test(refactor): switch to bashunit and start fleshing out a new test suite

Apply shfmt formatting and fix some schellcheck complaints.

.env

@@ -0,0 +1 @@
+BASHUNIT_BOOTSTRAP=tests/bootstrap.sh

.gitignore

@@ -0,0 +1,4 @@
+test-legacy/test-runner.sh
+test-legacy/assert.sh
+test-legacy/stub.sh
+test/bashunit

.travis.yml

@@ -0,0 +1,16 @@
+language: c
+env:
+  - TMUX_VERSION="1.6"
+  - TMUX_VERSION="1.7"
+  - TMUX_VERSION="1.8"
+  - TMUX_VERSION="1.9a"
+  - TMUX_VERSION="2.0"
+before_install:
+  - sudo apt-get update
+  - sudo apt-get install -y bc build-essential libevent-dev libncurses5-dev
+  - wget https://github.com/tmux/tmux/releases/download/${TMUX_VERSION}/tmux-${TMUX_VERSION}.tar.gz
+  - tar -zxf tmux-${TMUX_VERSION}.tar.gz
+  - cd tmux-${TMUX_VERSION}
+  - ./configure && make && sudo make install
+  - cd ..
+script: make test

AGENTS.md

@@ -0,0 +1,150 @@
+# AGENTS.md
+
+This file provides guidance to AI Agents when working with code in this
+repository.
+
+## Project Overview
+
+Tmuxifier is a shell-based tool for creating and managing complex Tmux session
+and window layouts. Users write layout files as shell scripts that use tmux
+commands and helper functions to define session/window configurations.
+
+## Architecture
+
+### Core Components
+
+- **bin/tmuxifier**: Main executable that bootstraps the environment, validates
+  Tmux version (≥1.6), and dispatches to libexec commands
+- **libexec/**: Command implementations (tmuxifier-*, e.g.,
+  tmuxifier-load-session, tmuxifier-new-window)
+- **lib/layout-helpers.sh**: Helper functions available within layout files
+  (new_window, split_v, split_h, run_cmd, select_pane, etc.)
+- **lib/runtime.sh**: Runtime environment loader sourced by layout files
+- **lib/env.sh**: Sets up TMUXIFIER_LAYOUT_PATH (defaults to $TMUXIFIER/layouts)
+- **templates/**: Templates for new session.sh and window.sh layout files
+- **examples/**: Example layout files demonstrating usage
+
+### Layout File Types
+
+**Session layouts** (*.session.sh):
+
+- Define entire Tmux sessions with multiple windows
+- Must call `initialize_session` to create the session
+- Can load window layouts via `load_window` or define windows inline
+- Must call `finalize_and_go_to_session` at the end
+- Can set `session_root` for default directory
+
+**Window layouts** (*.window.sh):
+
+- Define single window configurations with panes
+- Loaded into existing sessions or from session layouts
+- Can set `window_root` for window-specific directory
+- Use helper functions to split panes and run commands
+
+### Key Concepts
+
+- Layout files are executed as shell scripts with lib/layout-helpers.sh sourced
+- Helper functions wrap tmux commands, managing session/window context
+- The `tmux` command itself is aliased to tmuxifier-tmux wrapper
+- Session creation moves default window to position 999, then kills it in
+  finalize_and_go_to_session
+- TMUXIFIER_TMUX_OPTS allows passing custom arguments to tmux
+
+## Development Commands
+
+### Testing
+
+Tests use [bashunit](https://github.com/TypedDevs/bashunit) framework. Use
+deepwiki MCP tool to lookup bashunit documentation if needed.
+
+```bash
+make test                                  # Run all tests
+make test FILE=tests/lib/util/foo_test.sh  # Run a single test file
+make bootstrap                             # Fetch test dependencies
+```
+
+Tests are located in `tests/` directory and follow bashunit conventions. Test
+files are named `*_test.sh`.
+
+Legacy tests in `test-legacy/` use test-runner.sh framework with assert.sh and
+stub.sh libraries. Run with `make test-legacy`.
+
+### Manual Testing
+
+```bash
+# Create and load a test window layout
+./bin/tmuxifier new-window test-window
+./bin/tmuxifier load-window test-window
+
+# Create and load a test session layout
+./bin/tmuxifier new-session test-session
+./bin/tmuxifier load-session test-session
+
+# List available layouts
+./bin/tmuxifier list-sessions
+./bin/tmuxifier list-windows
+```
+
+## Code Style
+
+- Shell scripts follow Bash conventions
+- 2-space indentation
+- Functions document arguments in comments
+- Use local variables for function scope
+- Prefer `[ ]` over `[[ ]]` for basic tests
+- Command substitution uses `$()` not backticks
+
+## Important Implementation Details
+
+### Helper Function Pattern
+
+Helper functions in lib/layout-helpers.sh follow this pattern:
+
+```bash
+function_name() {
+  # Parse optional arguments
+  if [ -n "$1" ]; then local arg=(-flag "$1"); fi
+
+  # Execute tmux command with session/window context
+  tmuxifier-tmux command -t "$session:$window" "${arg[@]}"
+
+  # Update state if needed
+  __go_to_window_or_session_path
+}
+```
+
+### Tmux Version Handling
+
+Code must support Tmux 1.6+. Version-specific behavior uses
+tmuxifier-tmux-version comparisons:
+
+```bash
+if [ "$(tmuxifier-tmux-version "1.9")" == "<" ]; then
+  # Tmux 1.8 and earlier
+else
+  # Tmux 1.9 and later
+fi
+```
+
+### Path Expansion
+
+Use `__expand_path` to handle ~ and variables in paths:
+
+```bash
+session_root() {
+  local dir="$(__expand_path $@)"
+  if [ -d "$dir" ]; then
+    session_root="$dir"
+  fi
+}
+```
+
+## Environment Variables
+
+- **TMUXIFIER**: Set to installation directory (auto-detected from bin location)
+- **TMUXIFIER_LAYOUT_PATH**: Custom layouts directory (default:
+  $TMUXIFIER/layouts)
+- **TMUXIFIER_TMUX_OPTS**: Custom arguments passed to tmux
+- **TMUXIFIER_TMUX_ITERM_ATTACH**: Set to "-CC" for iTerm2 integration
+- **TMUXIFIER_NO_COMPLETE**: Disable shell completion if set
+- **TMUXIFIER_MIN_TMUX_VERSION**: Minimum required Tmux version (1.6)

CLAUDE.md

@@ -0,0 +1 @@
+./AGENTS.md

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2012 Jim Myhrberg.
+Copyright (c) 2014 Jim Myhrberg.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

Makefile

@@ -0,0 +1,43 @@
+FETCHED_FILES :=
+
+# $(1) = local file path, $(2) = remote URL, $(3) = optional post-curl command
+define FETCH_FILE
+FETCHED_FILES += $(1)
+
+$(1):
+	echo "fetching $(1)..." && \
+	mkdir -p $(dir $(1)) && \
+	curl -s -L -o $(1) $(2)$(if $(3), && $(3),)
+
+remove_$(1):
+	test -f "$(1)" && rm "$(1)" && echo "removed $(1)" || true
+
+update_$(1): remove_$(1) $(1)
+endef
+
+$(eval $(call FETCH_FILE,tests/bashunit,\
+	https://github.com/TypedDevs/bashunit/releases/download/0.26.0/bashunit,\
+	chmod +x tests/bashunit))
+
+$(eval $(call FETCH_FILE,test-legacy/test-runner.sh,\
+	https://github.com/jimeh/test-runner.sh/raw/v0.2.0/test-runner.sh,\
+	chmod +x test-legacy/test-runner.sh))
+$(eval $(call FETCH_FILE,test-legacy/assert.sh,\
+	https://raw.github.com/lehmannro/assert.sh/v1.0.2/assert.sh))
+$(eval $(call FETCH_FILE,test-legacy/stub.sh,\
+	https://raw.github.com/jimeh/stub.sh/v1.0.1/stub.sh))
+
+test: bootstrap
+	./tests/bashunit $(FILE)
+
+test-legacy: bootstrap
+	./test-legacy/test-runner.sh $(FILE)
+
+bootstrap: $(FETCHED_FILES)
+clean: $(addprefix remove_,$(FETCHED_FILES))
+update: $(addprefix update_,$(FETCHED_FILES))
+
+.SILENT:
+.PHONY: test bootstrap clean update \
+	$(addprefix remove_,$(FETCHED_FILES)) \
+	$(addprefix update_,$(FETCHED_FILES))

README.md

@@ -1,20 +1,20 @@
-# Tmuxifier
+# Tmuxifier [![Build Status](https://api.travis-ci.org/jimeh/tmuxifier.svg)](https://travis-ci.org/jimeh/tmuxifier)
 
-Tmuxify your Tmux. Create, edit, mangage and load complex Tmux session, window
+Tmuxify your Tmux. Create, edit, manage and load complex Tmux session, window
 and pane configurations with ease.
 
-In short, Tmuxifier allows you to easily create, edit, and load "layout"
+In short, Tmuxifier allows you to easily create, edit, and load "layout" files,
-files, which are simple shell scripts where you use the `tmux` command and
+which are simple shell scripts where you use the `tmux` command and helper
-helper commands provided by tmuxifier to manage Tmux sessions and windows
+commands provided by `tmuxifier` to manage Tmux sessions and windows
 
 ### Window Layouts
 
-Window layouts create a new Tmux window, optionally setting the window title
+Window layouts create a new Tmux window, optionally setting the window title and
-and root path where all shells are cd'd to by default. It allows you to easily
+root path where all shells are cd'd to by default. It allows you to easily split
-split a window into specifically sized panes and more as you wish.
+a window into specifically sized panes and more as you wish.
 
-You can load a window layout directly into your current Tmux session, or into
+You can load a window layout directly into your current Tmux session, or into a
-a session layout to have the window created along with the session.
+session layout to have the window created along with the session.
 
 ### Session Layouts
 
@@ -25,10 +25,11 @@ defined directly within the session layout file.
 
 ## Example
 
-Given we have a window layout file called [example.window.sh][] which
+Given we have a window layout file called [example.window.sh][] which looks
-looks like:
+like:
 
-[example.window.sh]: https://github.com/jimeh/tmuxifier/blob/master/examples/example.window.sh
+[example.window.sh]:
+  https://github.com/jimeh/tmuxifier/blob/master/examples/example.window.sh
 
 ```bash
 window_root "~/Desktop"
@@ -39,12 +40,10 @@ split_h 60
 select_pane 0
 ```
 
-You can then load that window layout into a new window in the
+You can then load that window layout into a new window in the current tmux
-current tmux session using:
+session using:
 
-```bash
+    tmuxifier load-window example
-tmuxifier load-window example
-```
 
 Which will yield a Tmux window looking like this:
 
@@ -52,34 +51,109 @@ Which will yield a Tmux window looking like this:
 
 ## Installation
 
+### Manual
+
 Clone the repo to your machine:
 
+    git clone https://github.com/jimeh/tmuxifier.git ~/.tmuxifier
+
+Then add `$HOME/.tmuxifier/bin` to your PATH to make the `tmuxifier` executable
+available to you:
+
+**In bash & zsh:**
+
 ```bash
-git clone https://github.com/jimeh/tmuxifier.git ~/.tmuxifier
+export PATH="$HOME/.tmuxifier/bin:$PATH"
 ```
 
-### bash & zsh
+**In tcsh:**
+
+```tcsh
+set path = ( "~/.tmuxifier/bin" $path )
+```
+
+**In fish:**
+
+```bash
+set -gx PATH "~/.tmuxifier/bin" $PATH
+```
+
+#### Custom Installation Path
+
+To install Tmuxifier somewhere else than the suggested `~/.tmuxifier`, simply
+clone the repository to your custom location, and ensure the `bin` folder is
+added to your PATH making the `tmuxifier` executable available to you.
+
+### TPM
+
+You can also install and update Tmuxifier with
+[TPM](https://github.com/tmux-plugins/tpm):
+
+```bash
+set -g @plugin 'jimeh/tmuxifier'
+```
+
+Trigger TPM's install command with `prefix` + `I` to install Tmuxifier to TPM's
+plugin directory (default is `$HOME/.tmux/plugins`).
+
+To use the `tmuxifier` command, you will need to add the `bin` directory to your
+PATH. If you are using the default TPM plugin directory, the `bin` directory
+will be `$HOME/.tmux/plugins/tmuxifier/bin`.
+
+## Setup
+
+**In bash & zsh:**
 
 And add the following to your `~/.profile`, `~/.bash_profile`, `~/.zshrc` or
 equivalent:
 
 ```bash
-[[ -s "$HOME/.tmuxifier/init.sh" ]] && source "$HOME/.tmuxifier/init.sh"
+eval "$(tmuxifier init -)"
 ```
 
-### tcsh
+**In tcsh:**
 
 Add the following to your `~/.cshrc`, `~/.tcshrc` or equivalent:
 
 ```tcsh
-if ( -s "$HOME/.tmuxifier/init.sh" ) then
+eval `tmuxifier init -`
-  source "$HOME/.tmuxifier/init.sh"
+```
-endif
+
+**In fish:**
+
+And add the following to your `~/.config/fish/config.fish` or equivalent:
+
+```bash
+eval (tmuxifier init - fish)
+```
+
+### Custom Tmux Arguments
+
+If you need to pass custom arguments to `tmux` itself, you can do so by setting
+the `TMUXIFIER_TMUX_OPTS` environment variable. For example to set custom
+arguments globally:
+
+```bash
+export TMUXIFIER_TMUX_OPTS="-L my-awesome-socket-name"
+eval "$(tmuxifier init -)"
+```
+
+And/or specify dynamically when calling `tmuxifier`:
+
+```bash
+TMUXIFIER_TMUX_OPTS="-L other-socket" tmuxifier load-session welcome
+```
+
+## Updating
+
+```bash
+cd ~/.tmuxifier # or where you've cloned tmuxifier to
+git pull
 ```
 
 ## Usage
 
-*__Note:__ This section needs expanding upon.*
+_**Note:** This section needs expanding upon._
 
 For a quick reference on available commands and their aliases, please run:
 
@@ -87,8 +161,8 @@ For a quick reference on available commands and their aliases, please run:
 
 Tmuxifier doesn't come with any layouts, so you'll want to create your own
 window and session layout files. New layout files are populated with examples
-and comments explaining what things do. Also, having a look at the
+and comments explaining what things do. Also, having a look at the [examples][]
-[examples][] directory will also give you a good idea.
+directory will also give you a good idea.
 
 ### Window Layouts
 
@@ -96,16 +170,16 @@ First off you'll want to define a window layout:
 
     tmuxifier new-window my-awesome-window
 
-This will create a new layout file called `my-awesome-window.window.sh` in
+This will create a new layout file called `my-awesome-window.window.sh` in your
-your `$TMUXIFIER_LAYOUT_PATH`, and open it with the editor defined in
+`$TMUXIFIER_LAYOUT_PATH`, and open it with the editor defined in `$EDITOR`.
-`$EDITOR`. Customize it as you wish, and save.
+Customize it as you wish, and save.
 
-You can now load *my-awesome-window* with the following command:
+You can now load _my-awesome-window_ with the following command:
 
     tmuxifier load-window my-awesome-window
 
-You should now have a new Tmux window open created from your custom and
+You should now have a new Tmux window open created from your custom and awesome
-awesome window layout.
+window layout.
 
 ### Session Layouts
 
@@ -115,8 +189,9 @@ To create your first session layout, run:
 
 Same deal as with creating a new window, except the filename ends with
 `.session.sh` instead of `.window.sh`, and the file's pre-populated content
-looks different. To have your awesome window loaded, add `load_window
+looks different. To have your awesome window loaded, add
-"my-awesome-window"` to the session layout next to existing examples.
+`load_window "my-awesome-window"` to the session layout next to existing
+examples.
 
 To load the session layout simply run:
 
@@ -129,17 +204,6 @@ in it.
 
 ## Configure & Customize
 
-### Custom Installaton Path
-
-To install Tmuxifier to a custom path, clone the repository to your desired
-path and set `$TMUXIFIER` to that path, additionally loading `init.sh` or
-`init.tcsh` from that same path.
-
-```bash
-export TMUXIFIER="$HOME/.dotfiles/tmuxifier"
-[[ -s "$TMUXIFIER/init.sh" ]] && source "$TMUXIFIER/init.sh"
-```
-
 ### Custom Layouts Path
 
 You can customize the layouts directory used by Tmuxifier by setting
@@ -151,13 +215,28 @@ export TMUXIFIER_LAYOUT_PATH="$HOME/.tmux-layouts"
 
 ### Disable Shell-Completion
 
-Tmuxifier comes with shell-completion for bash, zsh and tcsh. If for any
+Tmuxifier comes with shell-completion for bash, zsh, tcsh, and fish. If for any
 reason you need to disable it, just set `$TMUXIFIER_NO_COMPLETE`.
 
 ```bash
 export TMUXIFIER_NO_COMPLETE=1
 ```
 
+## Tips
+
+### iTerm2 Integration
+
+Tmuxifier supports iTerm2's [Tmux integration][]. It can be used in two ways:
+
+- Passing `-CC` as a second argument to the `load-session` command. For example:
+
+          tmuxifier load-session my-awesome-session -CC
+
+- Setting the `TMUXIFIER_TMUX_ITERM_ATTACH` environment variable to `-CC` before
+  calling the `load-session` command.
+
+[tmux integration]: https://gitlab.com/gnachman/iterm2/wikis/TmuxIntegration
+
 ## Inspiration
 
 - Tmuxifier is largely inspired by [Tmuxinator][].
@@ -166,56 +245,46 @@ export TMUXIFIER_NO_COMPLETE=1
 
 ## Tmuxifier vs. Tmuxinator
 
-Though Tmuxifier is largely inspired by the excellent [Tmuxinator][] project,
+Though Tmuxifier is largely inspired by the excellent [Tmuxinator][] project, it
-it does set itself apart in a number of ways:
+does set itself apart in a number of ways:
 
-- Uses shell scripts to define Tmux sessions and windows instead of YAML
+- Uses shell scripts to define Tmux sessions and windows instead of YAML files.
-  files. The benefit is total control over Tmux, but the definition files are
+  The benefit is total control over Tmux, but the definition files are more
-  more complicated to work with.
+  complicated to work with.
 - Instead of using a "project" concept, Tmuxifier uses a concept of "sessions"
   and "windows" just like Tmux itself. This allows you to load a whole session
-  with multiple pre-defined window configurations, or just load a single
+  with multiple pre-defined window configurations, or just load a single window
-  window configuration into your existing session.
+  configuration into your existing session.
 - Tmuxifier is a set of shell scripts, meaning it doesn't require Ruby to be
   installed on the machine.
 
 [tmuxinator]: https://github.com/aziz/tmuxinator
 [rbenv]: https://github.com/sstephenson/rbenv
 
-## Heed My Warning
-
-Tmuxifier is pretty much an alpha product hacked together over a weekend at
-this point. Documentation is sketchy at best, and things might drastically
-change and/or break.
-
-But if that doesn't put you off, please enjoy Tmuxifier :)
-
 ## Todos
 
-* Improve Readme, specially Usage section.
+- Improve Readme, specially Usage section.
-* Expand `help` command with details for most commands, rather than just the
+- Write up a detailed reference for all available layout helper functions.
-  essential ones.
 
 ## License
 
 (The MIT license)
 
-Copyright (c) 2013 Jim Myhrberg.
+Copyright (c) 2014 Jim Myhrberg.
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
+Permission is hereby granted, free of charge, to any person obtaining a copy of
-of this software and associated documentation files (the "Software"), to deal
+this software and associated documentation files (the "Software"), to deal in
-in the Software without restriction, including without limitation the rights
+the Software without restriction, including without limitation the rights to
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-copies of the Software, and to permit persons to whom the Software is
+the Software, and to permit persons to whom the Software is furnished to do so,
-furnished to do so, subject to the following conditions:
+subject to the following conditions:
 
 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-SOFTWARE.

bin/tmuxifier

@@ -2,28 +2,58 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+resolve_link() {
+  $(type -p greadlink readlink | head -1) $1
+}
+
+abs_dirname() {
+  local cwd="$(pwd)"
+  local path="$1"
+
+  while [ -n "$path" ]; do
+    cd "${path%/*}"
+    local name="${path##*/}"
+    path="$(resolve_link "$name" || true)"
+  done
+
+  pwd
+  cd "$cwd"
+}
+
 if [ -z "${TMUXIFIER}" ]; then
-  export TMUXIFIER="${HOME}/.tmuxifier"
+  # Set TMUXIFIER relative to the "tmuxifier" executable.
+  export TMUXIFIER="$(dirname "$(abs_dirname "$0")")"
 else
+  # Strip any trailing slash (/) characters from TMUXIFIER variable.
   export TMUXIFIER="${TMUXIFIER%/}"
 fi
 
 # Load tmuxifier environment variables.
 source "$TMUXIFIER/lib/env.sh"
 
+# Add tmuxifier's internal commands to PATH.
 export PATH="$TMUXIFIER/libexec:$PATH"
 
+# Check Tmux version.
+export TMUXIFIER_MIN_TMUX_VERSION="1.6"
+if [ "$(tmuxifier-tmux-version "$TMUXIFIER_MIN_TMUX_VERSION")" == "<" ]; then
+  echo -e "ERROR: Tmuxifier requires Tmux v${TMUXIFIER_MIN_TMUX_VERSION}" \
+    "or newer. You have v$(tmuxifier-tmux-version)." >&2
+  exit 1
+fi
+
+# Parse given command
 command="$1"
 case "$command" in
-  "" | "-h" | "--help" )
+  "" | "-h" | "--help")
     echo -e "tmuxifier $(tmuxifier-version)\n$(tmuxifier-help)" >&2
     ;;
 
-  "-v" | "--version" )
+  "-v" | "--version")
     tmuxifier-version
     ;;
 
-  * )
+  *)
     ! command_path="$(tmuxifier-resolve-command-path "$command")"
 
     if [ -z "$command_path" ]; then

completion/tmuxifier.bash

@@ -3,11 +3,11 @@ _tmuxifier() {
   local word="${COMP_WORDS[COMP_CWORD]}"
 
   if [ "$COMP_CWORD" -eq 1 ]; then
-    COMPREPLY=( $(compgen -W "$(tmuxifier commands)" -- "$word") )
+    COMPREPLY=($(compgen -W "$(tmuxifier commands)" -- "$word"))
   else
     local command="${COMP_WORDS[1]}"
     local completions="$(tmuxifier completions "$command")"
-    COMPREPLY=( $(compgen -W "$completions" -- "$word") )
+    COMPREPLY=($(compgen -W "$completions" -- "$word"))
   fi
 }
 

completion/tmuxifier.fish

@@ -0,0 +1,36 @@
+
+set -l cmd_load_session  'load-session s'
+set -l cmd_load_window   'load-window w'
+set -l cmd_list          'list l'
+set -l cmd_list_sessions 'list-sessions ls'
+set -l cmd_list_windows  'list-windows lw'
+set -l cmd_new_session   'new-session ns'
+set -l cmd_new_window    'new-window nw'
+set -l cmd_edit_session  'edit-session es'
+set -l cmd_edit_window   'edit-window ew'
+set -l cmd_commands      'commands'
+set -l cmd_version       'version'
+set -l cmd_help          'help'
+
+complete -c tmuxifier -x
+
+# Commands
+complete -c tmuxifier -n '__fish_use_subcommand' -a $cmd_load_session  -d 'Load the specified session layout.'
+complete -c tmuxifier -n '__fish_use_subcommand' -a $cmd_load_window   -d 'Load the specified window layout into current session.'
+complete -c tmuxifier -n '__fish_use_subcommand' -a $cmd_list          -d 'List all session and window layouts.'
+complete -c tmuxifier -n '__fish_use_subcommand' -a $cmd_list_sessions -d 'List session layouts.'
+complete -c tmuxifier -n '__fish_use_subcommand' -a $cmd_list_windows  -d 'List window layouts.'
+complete -c tmuxifier -n '__fish_use_subcommand' -a $cmd_new_session   -d 'Create new session layout and open it with $EDITOR.'
+complete -c tmuxifier -n '__fish_use_subcommand' -a $cmd_new_window    -d 'Create new window layout and open it with $EDITOR.'
+complete -c tmuxifier -n '__fish_use_subcommand' -a $cmd_edit_session  -d 'Edit specified session layout with $EDITOR.'
+complete -c tmuxifier -n '__fish_use_subcommand' -a $cmd_edit_window   -d 'Edit specified window layout with $EDITOR.'
+complete -c tmuxifier -n '__fish_use_subcommand' -a $cmd_commands      -d 'List all tmuxifier commands.'
+complete -c tmuxifier -n '__fish_use_subcommand' -a $cmd_version       -d 'Print Tmuxifier version.'
+complete -c tmuxifier -n '__fish_use_subcommand' -a $cmd_help          -d 'Show this message.'
+
+# Complete subcommands
+complete -c tmuxifier -x -n "__fish_seen_subcommand_from $cmd_load_session" -a '(tmuxifier list-sessions)' -d 'session-template'
+complete -c tmuxifier -x -n "__fish_seen_subcommand_from $cmd_load_window"  -a '(tmuxifier list-windows)'  -d 'window-template'
+complete -c tmuxifier -x -n "__fish_seen_subcommand_from $cmd_edit_session" -a '(tmuxifier list-sessions)' -d 'session-template'
+complete -c tmuxifier -x -n "__fish_seen_subcommand_from $cmd_edit_window"  -a '(tmuxifier list-windows)'  -d 'window-template'
+

init.fish

@@ -0,0 +1,20 @@
+# Set/fix Tmuxifier root path if needed.
+if test -z $TMUXIFIER
+  set -gx TMUXIFIER "$HOME/.tmuxifier"
+end
+
+# Add `bin` directroy to `$PATH`.
+if not contains "$TMUXIFIER/bin" $PATH
+  set -gx PATH "$TMUXIFIER/bin" $PATH
+end
+
+# If `tmuxifier` is available, and `$TMUXIFIER_NO_COMPLETE` is not set, then
+# load Tmuxifier shell completion.
+if test -n (which tmuxifier); and test -z $TMUXIFIER_NO_COMPLETE
+    # fish shell 2.0.0 does not have the source alias
+    if [ (fish --version 2>| awk -F'version ' '{print $2}') = '2.0.0' ];
+      . "$TMUXIFIER/completion/tmuxifier.fish"
+    else
+      source "$TMUXIFIER/completion/tmuxifier.fish"
+    end
+end

init.sh

@@ -1,4 +1,4 @@
-# Set tmuxifier root path.
+# Set/fix Tmuxifier root path if needed.
 if [ -z "${TMUXIFIER}" ]; then
   export TMUXIFIER="${HOME}/.tmuxifier"
 else
@@ -6,10 +6,12 @@ else
 fi
 
 # Add `bin` directroy to `$PATH`.
-export PATH="$TMUXIFIER/bin:$PATH"
+if [[ ":$PATH:" != *":$TMUXIFIER/bin:"* ]]; then
+  export PATH="$TMUXIFIER/bin:$PATH"
+fi
 
 # If `tmuxifier` is available, and `$TMUXIFIER_NO_COMPLETE` is not set, then
-# load tmuxifier shell completion.
+# load Tmuxifier shell completion.
 if [ -n "$(command -v "tmuxifier")" ] && [ -z "$TMUXIFIER_NO_COMPLETE" ]; then
   if [ -n "$BASH_VERSION" ]; then
     source "$TMUXIFIER/completion/tmuxifier.bash"

init.tcsh

@@ -1,13 +1,15 @@
-# Set tmuxifier root path.
+# Set Tmuxifier root path if needed.
 if ( ! $?TMUXIFIER ) then
   setenv TMUXIFIER "${HOME}/.tmuxifier"
 endif
 
-# Add `bin` directroy to `$PATH`.
+# Add `bin` directroy to `$path` if needed.
-set path = ( $TMUXIFIER/bin $path )
+if ( ! (" $path " =~ "* $TMUXIFIER/bin *" ) ) then
+  set path = ( $TMUXIFIER/bin $path )
+endif
 
 # If `tmuxifier` is available, and `$TMUXIFIER_NO_COMPLETE` is not set, then
-# load tmuxifier shell completion.
+# load Tmuxifier shell completion.
 if ( ! $?TMUXIFIER_NO_COMPLETE ) then
   which tmuxifier > /dev/null && source "$TMUXIFIER/completion/tmuxifier.tcsh"
 endif

lib/layout-helpers.sh

@@ -6,6 +6,11 @@
 # otherwise more complex means.
 #
 
+# Alias tmux to tmuxifier-tmux wrapper.
+tmux() {
+  tmuxifier-tmux "$@"
+}
+
 # Create a new window.
 #
 # Arguments:
@@ -13,11 +18,15 @@
 #   - $2: (optional) Shell command to execute when window is created.
 #
 new_window() {
-  if [ -n "$1" ]; then window="$1"; fi
+  if [ -n "$1" ]; then local winarg=(-n "$1"); fi
   if [ -n "$2" ]; then local command=("$2"); fi
-  if [ -n "$window" ]; then local winarg=(-n "$window"); fi
 
-  tmux new-window -t "$session:" "${winarg[@]}" "${command[@]}"
+  tmuxifier-tmux new-window -t "$session:" "${winarg[@]}" "${command[@]}"
+
+  # Disable renaming if a window name was given.
+  if [ -n "$1" ]; then tmuxifier-tmux set-option -t "$1" allow-rename off; fi
+
+  window="$(__get_current_window_index)"
   __go_to_window_or_session_path
 }
 
@@ -28,8 +37,13 @@ new_window() {
 #   - $2: (optional) Target pane ID to split in current window.
 #
 split_v() {
-  if [ -n "$1" ]; then local percentage=(-p "$1"); fi
+  if [ "$(tmuxifier-tmux-version "3.0")" == ">" ]; then
-  tmux split-window -t "$session:$window.$2" -v "${percentage[@]}"
+    # Tmux 3.1 and later.
+    if [ -n "$1" ]; then local percentage=(-l "$1"'%'); fi
+  else
+    if [ -n "$1" ]; then local percentage=(-p "$1"); fi
+  fi
+  tmuxifier-tmux split-window -t "$session:$window.$2" -v "${percentage[@]}"
   __go_to_window_or_session_path
 }
 
@@ -40,18 +54,56 @@ split_v() {
 #   - $2: (optional) Target pane ID to split in current window.
 #
 split_h() {
-  if [ -n "$1" ]; then local percentage=(-p "$1"); fi
+  if [ "$(tmuxifier-tmux-version "3.0")" == ">" ]; then
-  tmux split-window -t "$session:$window.$2" -h "${percentage[@]}"
+    # Tmux 3.1 and later.
+    if [ -n "$1" ]; then local percentage=(-l "$1"'%'); fi
+  else
+    if [ -n "$1" ]; then local percentage=(-p "$1"); fi
+  fi
+  tmuxifier-tmux split-window -t "$session:$window.$2" -h "${percentage[@]}"
   __go_to_window_or_session_path
 }
 
+# Split current window/pane vertically by line count.
+#
+# Arguments:
+#   - $1: (optional) Number of lines the new pane will use.
+#   - $2: (optional) Target pane ID to split in current window.
+#
+split_vl() {
+  if [ -n "$1" ]; then local count=(-l "$1"); fi
+  tmuxifier-tmux split-window -t "$session:$window.$2" -v "${count[@]}"
+  __go_to_window_or_session_path
+}
+
+# Split current window/pane horizontally by column count.
+#
+# Arguments:
+#   - $1: (optional) Number of columns the new pane will use.
+#   - $2: (optional) Target pane ID to split in current window.
+#
+split_hl() {
+  if [ -n "$1" ]; then local count=(-l "$1"); fi
+  tmuxifier-tmux split-window -t "$session:$window.$2" -h "${count[@]}"
+  __go_to_window_or_session_path
+}
+
+# Run clock mode.
+#
+# Arguments:
+#   - $1: (optional) Target pane ID in which to run
+clock() {
+  tmuxifier-tmux clock-mode -t "$session:$window.$1"
+}
+
 # Select a specific window.
 #
 # Arguments:
 #   - $1: Window ID or name to select.
 #
 select_window() {
-  tmux select-window -t "$session:$1"
+  tmuxifier-tmux select-window -t "$session:$1"
+  window="$(__get_current_window_index)"
 }
 
 # Select a specific pane in the current window.
@@ -60,7 +112,45 @@ select_window() {
 #   - $1: Pane ID to select.
 #
 select_pane() {
-  tmux select-pane -t "$session:$window.$1"
+  tmuxifier-tmux select-pane -t "$session:$window.$1"
+}
+
+# Balance windows vertically with the "even-vertical" layout.
+#
+# Arguments:
+#   - $1: (optional) Window ID or name to operate on.
+#
+balance_windows_vertical() {
+  tmuxifier-tmux select-layout -t "$session:${1:-$window}" even-vertical
+}
+
+# Balance windows horizontally with the "even-horizontal" layout.
+#
+# Arguments:
+#   - $1: (optional) Window ID or name to operate on.
+#
+balance_windows_horizontal() {
+  tmuxifier-tmux select-layout -t "$session:${1:-$window}" even-horizontal
+}
+
+# Turn on synchronize-panes in a window.
+#
+# Arguments:
+#   - $1: (optional) Window ID or name to operate on.
+#
+synchronize_on() {
+  tmuxifier-tmux set-window-option -t "$session:${1:-$window}" \
+    synchronize-panes on
+}
+
+# Turn off synchronize-panes in a window.
+#
+# Arguments:
+#   - $1: (optional) Window ID or name to operate on.
+#
+synchronize_off() {
+  tmuxifier-tmux set-window-option -t "$session:${1:-$window}" \
+    synchronize-panes off
 }
 
 # Send/paste keys to the currently active pane/window.
@@ -70,7 +160,7 @@ select_pane() {
 #   - $2: (optional) Target pane ID to send input to.
 #
 send_keys() {
-  tmux send-keys -t "$session:$window.$2" "$1"
+  tmuxifier-tmux send-keys -t "$session:$window.$2" "$1"
 }
 
 # Runs a shell command in the currently active pane/window.
@@ -84,7 +174,7 @@ run_cmd() {
   send_keys "C-m" "$2"
 }
 
-# Cusomize session root path. Default is `$HOME`.
+# Customize session root path. Default is `$HOME`.
 #
 # Arguments:
 #   - $1: Directory path to use for session root.
@@ -111,12 +201,22 @@ window_root() {
 # Load specified window layout.
 #
 # Arguments:
-#   - $1: Name of window layout to load.
+#   - $1: Name of or file path to window layout to load.
+#   - $2: (optional) Override default window name.
 #
 load_window() {
-  local file="$TMUXIFIER_LAYOUT_PATH/$1.window.sh"
+  local file="$1"
+  if [ ! -f "$file" ]; then
+    file="$TMUXIFIER_LAYOUT_PATH/$1.window.sh"
+  fi
+
   if [ -f "$file" ]; then
-    window="$1"
+    if [ $# -gt 1 ]; then
+      window="$2"
+    else
+      window="${1/%.window.sh/}"
+      window="${window/%.sh/}"
+    fi
     source "$file"
     window=
 
@@ -125,28 +225,50 @@ load_window() {
       window_root "$session_root"
     fi
   else
-    echo "No such window layout found '$1' in '$TMUXIFIER_LAYOUT_PATH'."
+    echo "\"$1\" window layout not found." >&2
+    return 1
   fi
 }
 
 # Load specified session layout.
 #
 # Arguments:
-#   - $1: Name of session layout to load.
+#   - $1: Name of or file path to session layout to load.
+#   - $2: (optional) Override default window name.
 #
 load_session() {
-  local file="$TMUXIFIER_LAYOUT_PATH/$1.session.sh"
+  local file
-  if [ -f "$file" ]; then
+  if [ "${1#*/}" = "$1" ]; then
-    session="$1"
+    # There's no slash in the path.
-    source "$file"
+    if [ -f "$TMUXIFIER_LAYOUT_PATH/$1.session.sh" ] || [ ! -f "$1" ]; then
-    session=
+      file="$TMUXIFIER_LAYOUT_PATH/$1.session.sh"
-
+    else
-    # Reset `$session_root`.
+      # bash's 'source' requires an slash in the filename to not use $PATH.
-    if [[ "$session_root" != "$HOME" ]]; then
+      file="./$1"
-      session_root="$HOME"
     fi
   else
-    echo "No such session layout found '$1' in '$TMUXIFIER_LAYOUT_PATH'."
+    file="$1"
+  fi
+
+  if ! [ -f "$file" ]; then
+    echo "\"$1\" session layout not found." >&2
+    return 1
+  fi
+
+  if [ $# -gt 1 ]; then
+    session="$2"
+  else
+    session="${1/%.session.sh/}"
+    session="${session/%.sh/}"
+  fi
+
+  set_default_path=true
+  source "$file"
+  session=
+
+  # Reset `$session_root`.
+  if [[ "$session_root" != "$HOME" ]]; then
+    session_root="$HOME"
   fi
 }
 
@@ -168,50 +290,66 @@ initialize_session() {
   fi
 
   # Ensure tmux server is running for has-session check.
-  tmux start-server
+  tmuxifier-tmux start-server
 
   # Check if the named session already exists.
-  if ! tmux has-session -t "$session:" 2>/dev/null; then
+  if tmuxifier-tmux list-sessions | grep -q "^$session:"; then
+    return 1
+  fi
+
+  # Tmux 1.8 and earlier.
+  if [ "$(tmuxifier-tmux-version "1.9")" == "<" ]; then
     # Create the new session.
-    env TMUX="" tmux new-session -d -s "$session"
+    TMUX="" tmuxifier-tmux new-session -d -s "$session"
 
     # Set default-path for session
     if [ -n "$session_root" ] && [ -d "$session_root" ]; then
       cd "$session_root"
-      tmux set-option -t "$session:" default-path "$session_root" 1>/dev/null
+
+      $set_default_path && tmuxifier-tmux \
+        set-option -t "$session:" \
+        default-path "$session_root" 1> /dev/null
     fi
 
-    # In order to ensure only specified windows are created, we move the
+  # Tmux 1.9 and later.
-    # default window to position 999, and later remove it with the
+  else
-    # `finalize_and_go_to_session` function.
+    if $set_default_path; then
-    local first_window_index=$(__get_first_window_index)
+      local session_args=(-c "$session_root")
-    tmux move-window -s "$session:$first_window_index" -t "$session:999"
+    fi
 
-    # Session created, return ok exit status.
+    TMUX="" tmuxifier-tmux new-session \
-    return 0
+      -d -s "$session" "${session_args[@]}"
   fi
-  # Session already existed, return error exit status.
+
-  return 1
+  if $set_default_path && [[ "$session_root" != "$HOME" ]]; then
+    tmuxifier-tmux setenv -t "$session:" \
+      TMUXIFIER_SESSION_ROOT "$session_root"
+  fi
+
+  # In order to ensure only specified windows are created, we move the
+  # default window to position 999, and later remove it with the
+  # `finalize_and_go_to_session` function.
+  local first_window_index=$(__get_first_window_index)
+  tmuxifier-tmux move-window \
+    -s "$session:$first_window_index" -t "$session:999"
 }
 
 # Finalize session creation and then switch to it if needed.
 #
-# When the session is created, it leaves a unused window in position #99, this
+# When the session is created, it leaves a unused window in position #999,
-# is the default window which was created with the session, but it's also a
+# this is the default window which was created with the session, but it's also
-# window that was not explicitly created. Hence we kill it.
+# a window that was not explicitly created. Hence we kill it.
 #
 # If the session was created, we've already been switched to it. If it was not
-# created, the session already exists, and we'll need to specifically switch
+# created, but already existed, then we'll need to specifically switch to it.
-# to it here.
 #
 finalize_and_go_to_session() {
-  ! tmux kill-window -t "$session:999" 2>/dev/null
+  ! tmuxifier-tmux kill-window -t "$session:999" 2> /dev/null
   if [[ "$(tmuxifier-current-session)" != "$session" ]]; then
     __go_to_session
   fi
 }
 
-
 #
 # Internal functions
 #
@@ -224,12 +362,13 @@ finalize_and_go_to_session() {
 #   /Users/jimeh/Projects
 #
 __expand_path() {
-  echo $(eval echo "$@")
+  eval echo "$*"
 }
 
 __get_first_window_index() {
-  local index
+  local index=$(tmuxifier-tmux list-windows -t "$session:" \
-  index=$(tmux list-windows -t "$session:" -F "#{window_index}" 2>/dev/null)
+    -F "#{window_index}" 2> /dev/null)
+
   if [ -n "$index" ]; then
     echo "$index" | head -1
   else
@@ -237,18 +376,38 @@ __get_first_window_index() {
   fi
 }
 
+__get_current_window_index() {
+  local lookup=$(tmuxifier-tmux list-windows -t "$session:" \
+    -F "#{window_active}:#{window_index}" 2> /dev/null | grep "^1:")
+
+  if [ -n "$lookup" ]; then
+    echo "${lookup/1:/}"
+  fi
+}
+
 __go_to_session() {
   if [ -z "$TMUX" ]; then
-    tmux -u attach-session -t "$session:"
+    tmuxifier-tmux $TMUXIFIER_TMUX_ITERM_ATTACH -u \
+      attach-session -t "$session:"
   else
-    tmux -u switch-client -t "$session:"
+    tmuxifier-tmux -u switch-client -t "$session:"
   fi
 }
 
 __go_to_window_or_session_path() {
-  local window_or_session_root=${window_root-$session_root}
+  local target_path
-  if [ -n "$window_or_session_root" ]; then
+
-    run_cmd "cd \"$window_or_session_root\""
+  if [ -n "$window_root" ]; then
-    send_keys "C-l"
+    target_path="$window_root"
+  elif [ -n "$TMUXIFIER_SESSION_ROOT" ]; then
+    target_path="$TMUXIFIER_SESSION_ROOT"
+  elif [ -n "$session_root" ]; then
+    target_path="$session_root"
+  fi
+
+  # local window_or_session_root=${window_root-$session_root}
+  if [ -n "$target_path" ]; then
+    run_cmd " cd \"$target_path\""
+    run_cmd " clear"
   fi
 }

lib/util.sh

@@ -0,0 +1,79 @@
+# Check if --help or -h flag is present in arguments.
+#
+# Usage:
+#   calling-help "$@" && { show_help; exit 0; }
+#
+# Arguments:
+#   $@ - Command-line arguments to check
+#
+# Returns:
+#   0 - If --help or -h is present as a standalone argument
+#   1 - Otherwise
+calling-help() {
+  if [[ " $* " != *" --help "* ]] && [[ " $* " != *" -h "* ]]; then
+    return 1
+  fi
+}
+
+# Check if --complete flag is present in arguments.
+#
+# Used to detect when shell completion is requesting completions.
+#
+# Usage:
+#   calling-complete "$@" && { generate_completions; exit 0; }
+#
+# Arguments:
+#   $@ - Command-line arguments to check
+#
+# Returns:
+#   0 - If --complete is present as a standalone argument
+#   1 - Otherwise
+calling-complete() {
+  if [[ " $* " != *" --complete "* ]]; then
+    return 1
+  fi
+}
+
+# Compare two dot-separated version strings.
+#
+# Based on: http://stackoverflow.com/a/4025065/42146
+#
+# Usage:
+#   vercomp "1.9.0" "1.10.0"
+#   case $? in
+#     0) echo "equal" ;;
+#     1) echo "first is greater" ;;
+#     2) echo "second is greater" ;;
+#   esac
+#
+# Arguments:
+#   $1 - First version string (e.g., "1.2.3")
+#   $2 - Second version string (e.g., "1.2.4")
+#
+# Returns:
+#   0 - Versions are equal
+#   1 - First version is greater than second
+#   2 - First version is less than second
+vercomp() {
+  if [[ "$1" == "$2" ]]; then return 0; fi
+
+  local IFS=. i
+  local -a ver1 ver2
+  read -ra ver1 <<< "$1"
+  read -ra ver2 <<< "$2"
+
+  # Fill empty fields in ver1 with zeros
+  for ((i = ${#ver1[@]}; i < ${#ver2[@]}; i++)); do ver1[i]=0; done
+
+  for ((i = 0; i < ${#ver1[@]}; i++)); do
+    # Fill empty fields in ver2 with zeros
+    if [[ -z ${ver2[i]} ]]; then ver2[i]=0; fi
+
+    if ((10#${ver1[i]} > 10#${ver2[i]})); then
+      return 1
+    elif ((10#${ver1[i]} < 10#${ver2[i]})); then
+      return 2
+    fi
+  done
+  return 0
+}

libexec/tmuxifier-alias

@@ -2,8 +2,11 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
 # Provide tmuxifier help
-if [ "$1" == "--help" ]; then
+if calling-help "$@"; then
   echo "usage: tmuxifier alias <alias>
 
 Resolve a command alias to it's full name."
@@ -11,33 +14,34 @@ Resolve a command alias to it's full name."
 fi
 
 case "$1" in
-  "session" | "ses" | "s" )
+  "session" | "ses" | "s")
     echo "load-session"
     ;;
-  "window" | "win" | "w" )
+  "window" | "win" | "w")
     echo "load-window"
     ;;
-  "new-ses" | "nses" | "ns" )
+  "new-ses" | "nses" | "ns")
     echo "new-session"
     ;;
-  "new-win" | "nwin" | "nw" )
+  "new-win" | "nwin" | "nw")
     echo "new-window"
     ;;
-  "edit-ses" | "eses" | "es" )
+  "edit-ses" | "eses" | "es")
     echo "edit-session"
     ;;
-  "edit-win" | "ewin" | "ew" )
+  "edit-win" | "ewin" | "ew")
     echo "edit-window"
     ;;
-  "l" )
+  "l")
     echo "list"
     ;;
-  "list-ses" | "lses" | "ls" )
+  "list-ses" | "lses" | "ls")
     echo "list-sessions"
     ;;
-  "list-win" | "lwin" | "lw" )
+  "list-win" | "lwin" | "lw")
     echo "list-windows"
     ;;
-  * )
+  *)
     exit 1
+    ;;
 esac

libexec/tmuxifier-commands

@@ -2,8 +2,11 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
 # Provide tmuxifier help
-if [ "$1" == "--help" ]; then
+if calling-help "$@"; then
   echo "usage: tmuxifier commands
 
 List all available commands, includes internal commands not intended for
@@ -13,7 +16,8 @@ fi
 
 shopt -s nullglob
 
-{ for path in ${PATH//:/$'\n'}; do
+{
+  for path in ${PATH//:/$'\n'}; do
     for command in "${path}/tmuxifier-"*; do
       command="${command##*tmuxifier-}"
       echo "$command"

libexec/tmuxifier-completions

@@ -2,8 +2,11 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
 # Provide tmuxifier help
-if [ "$1" == "--help" ]; then
+if calling-help "$@"; then
   echo "usage: tmuxifier completion <command>
 
 Print a list of available completions for specified command."
@@ -11,17 +14,17 @@ Print a list of available completions for specified command."
 fi
 
 # Provide tmuxifier completions
-if [ "$1" == "--complete" ]; then
+if calling-complete "$@"; then
   tmuxifier-commands
   exit
 fi
 
 has-completions() {
-  grep -i "^# Provide tmuxifier completions" "$1" >/dev/null
+  grep -i "^# Provide tmuxifier completions" "$1" > /dev/null
 }
 
 if [ -z "$1" ]; then
-  echo "$(tmuxifier-help completions)" >&2
+  tmuxifier-help completions "$@" >&2
   exit 1
 fi
 

libexec/tmuxifier-current-session

@@ -2,8 +2,11 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
 # Provide tmuxifier help
-if [ "$1" == "--help" ]; then
+if calling-help "$@"; then
   echo "usage: tmuxifier current-session
 
 Outputs the name of the current Tmux session."
@@ -11,8 +14,8 @@ Outputs the name of the current Tmux session."
 fi
 
 if [ -n "$TMUX" ]; then
-  for item in $(tmux list-pane -F "#{session_name}");do
+  for item in $(tmuxifier-tmux list-pane -F "#{session_name}"); do
-    echo $item
+    echo "$item"
     exit 0
   done
 fi

libexec/tmuxifier-edit-session

@@ -2,8 +2,11 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
 # Provide tmuxifier help
-if [ "$1" == "--help" ]; then
+if calling-help "$@"; then
   echo "usage: tmuxifier edit-session <layout_name>
 
 Aliases: edit-ses, eses, es
@@ -13,15 +16,13 @@ Open specified session layout for editing in \$EDITOR."
 fi
 
 # Provide tmuxifier completions
-if [ "$1" == "--complete" ]; then
+if calling-complete "$@"; then
-  for item in $(tmuxifier-list-sessions); do
+  tmuxifier-list-sessions
-    echo "$item"
-  done
   exit
 fi
 
 if [ -z "$1" ]; then
-  echo "$(tmuxifier-help edit-session)" >&2
+  tmuxifier-help edit-session "$@" >&2
   exit 1
 fi
 
@@ -36,4 +37,10 @@ if [ ! -f "$layout_file" ]; then
   exit 1
 fi
 
-exec "$EDITOR" "$layout_file"
+if [ -n "$EDITOR" ]; then
+  exec $EDITOR "$layout_file"
+else
+  echo "'\$EDITOR' is not set. Please manually open the layout for editing:"
+  echo "$layout_file"
+  echo
+fi

libexec/tmuxifier-edit-window

@@ -2,8 +2,11 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
 # Provide tmuxifier help
-if [ "$1" == "--help" ]; then
+if calling-help "$@"; then
   echo "usage: tmuxifier edit-window <layout_name>
 
 Aliases: edit-win, ewin, ew
@@ -13,15 +16,13 @@ Open specified window layout for editing in \$EDITOR."
 fi
 
 # Provide tmuxifier completions
-if [ "$1" == "--complete" ]; then
+if calling-complete "$@"; then
-  for item in $(tmuxifier-list-windows); do
+  tmuxifier-list-windows
-    echo "$item"
-  done
   exit
 fi
 
 if [ -z "$1" ]; then
-  echo "$(tmuxifier-help edit-window)" >&2
+  tmuxifier-help edit-window "$@" >&2
   exit 1
 fi
 
@@ -36,4 +37,10 @@ if [ ! -f "$layout_file" ]; then
   exit 1
 fi
 
-exec "$EDITOR" "$layout_file"
+if [ -n "$EDITOR" ]; then
+  exec $EDITOR "$layout_file"
+else
+  echo "'\$EDITOR' is not set. Please manually open the layout for editing:"
+  echo "$layout_file"
+  echo
+fi

libexec/tmuxifier-help

@@ -2,23 +2,25 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
 # Provide tmuxifier help
-if [ "$1" == "--help" ]; then
+if calling-help "$@"; then
   tmuxifier-help
   exit
 fi
 
 # Provide tmuxifier completions
-if [ "$1" == "--complete" ]; then
+if calling-complete "$@"; then
   tmuxifier-commands
   exit
 fi
 
 has-help() {
-  grep -i "^# Provide tmuxifier help" "$1" >/dev/null
+  grep -i "^# Provide tmuxifier help" "$1" > /dev/null
 }
 
-command="$1"
 if [ -z "$1" ]; then
   echo "usage: tmuxifier <command> [<args>]
 
@@ -33,7 +35,7 @@ Some useful tmuxifier commands are:
    new-window     nw       Create new window layout and open it with \$EDITOR.
    edit-session   es       Edit specified session layout with \$EDITOR.
    edit-window    ew       Edit specified window layout with \$EDITOR.
-   commands                List all tmuxifier commands.
+   commands                List all tmuxifier commands (including internal).
    version                 Print Tmuxifier version.
    help                    Show this message.
 
@@ -50,7 +52,7 @@ fi
 
 if has-help "$command_path"; then
   shift
-  exec "$command_path" --help "$@"
+  exec "$command_path" "$@" --help
 else
   command="$(basename "$command_path")"
   command="${command/tmuxifier\-/}"

libexec/tmuxifier-init

@@ -0,0 +1,90 @@
+#! /usr/bin/env bash
+set -e
+[ -n "$TMUXIFIER_DEBUG" ] && set -x
+
+# Set shell to first argument that is not "-", "-h" or "--help".
+for arg in "$@"; do
+  if [ "$arg" != "-" ] && [ "$arg" != "-h" ] && [ "$arg" != "--help" ]; then
+    shell="$arg"
+  fi
+done
+
+if [ -z "$shell" ]; then
+  shell="$(basename "$SHELL")"
+fi
+
+case "$shell" in
+  bash)
+    profile='~/.bash_profile'
+    ;;
+  zsh)
+    profile='~/.zshrc'
+    ;;
+  ksh)
+    profile='~/.profile'
+    ;;
+  csh)
+    profile='~/.cshrc'
+    ;;
+  tcsh)
+    profile='~/.tcshrc'
+    ;;
+  fish)
+    profile='~/.config/fish/config.fish'
+    ;;
+  *)
+    profile='shell init file'
+    ;;
+esac
+
+# Provide tmuxifier help
+if [[ " $@ " == *" --help "* ]]; then
+  echo "usage: tmuxifier init -
+
+Load Tmuxifier by adding the following to your ${profile}:
+"
+
+  case "$shell" in
+    csh | tcsh)
+      echo "    eval \`tmuxifier init -\`
+"
+      ;;
+    fish)
+      echo "    eval (tmuxifier init -)
+"
+      ;;
+    *)
+      echo "    eval \"\$(tmuxifier init -)\"
+"
+      ;;
+  esac
+
+  echo "You might also need to add Tmuxifier's bin directory to your PATH."
+  exit
+fi
+
+# Print help if "-" argument is not given
+if [[ " $* " != *" - "* ]]; then
+  tmuxifier-help init "$@" >&2
+  exit 1
+fi
+
+case "$shell" in
+  csh | tcsh)
+    echo "setenv TMUXIFIER \"$TMUXIFIER\";"
+    echo "source \"\$TMUXIFIER/init.tcsh\";"
+    ;;
+  fish)
+    echo "set -gx TMUXIFIER \"$TMUXIFIER\";"
+    # fish shell 2.0.0 does not have the source alias
+    if [[ $(fish --version 2>&1 | awk -F'version ' '{print $2}') = '2.0.0' ]]; then
+      echo ". \"\$TMUXIFIER/init.fish\";"
+    else
+      echo "source \"\$TMUXIFIER/init.fish\";"
+    fi
+    ;;
+  *)
+    echo "export TMUXIFIER=\"$TMUXIFIER\";"
+    echo "source \"\$TMUXIFIER/init.sh\";"
+    ;;
+esac

libexec/tmuxifier-list

@@ -2,8 +2,11 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
 # Provide tmuxifier help
-if [ "$1" == "--help" ]; then
+if calling-help "$@"; then
   echo "usage: tmuxifier list
 
 Aliases: l

libexec/tmuxifier-list-sessions

@@ -2,8 +2,11 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
 # Provide tmuxifier help
-if [ "$1" == "--help" ]; then
+if calling-help "$@"; then
   echo "usage: tmuxifier list-sessions
 
 Aliases: list-ses, lses, ls
@@ -12,7 +15,7 @@ List all session layouts."
   exit
 fi
 
-list=$(find -L "$TMUXIFIER_LAYOUT_PATH" -name "*.session.sh")
+list=$(find -L "$TMUXIFIER_LAYOUT_PATH" -name "*.session.sh" | sort)
 for file in $list; do
   file=${file/$TMUXIFIER_LAYOUT_PATH\//}
   echo "${file/.session.sh/}"

libexec/tmuxifier-list-windows

@@ -2,8 +2,11 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
 # Provide tmuxifier help
-if [ "$1" == "--help" ]; then
+if calling-help "$@"; then
   echo "usage: tmuxifier list-windows
 
 Aliases: list-win, lwin, lw
@@ -12,7 +15,7 @@ List all window layouts."
   exit
 fi
 
-list=$(find -L "$TMUXIFIER_LAYOUT_PATH" -name "*.window.sh")
+list=$(find -L "$TMUXIFIER_LAYOUT_PATH" -name "*.window.sh" | sort)
 for file in $list; do
   file=${file/$TMUXIFIER_LAYOUT_PATH\//}
   echo "${file/.window.sh/}"

libexec/tmuxifier-load-session

@@ -2,32 +2,44 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
 # Provide tmuxifier help
-if [ "$1" == "--help" ]; then
+if calling-help "$@"; then
-  echo "usage: tmuxifier load-session <layout_name>
+  echo "usage: tmuxifier load-session <layout_name | file_path> [<iterm mode>]
 
 Aliases: session, ses, s
 
 Create a session using the session layout, unless the session already exists
-in which case, we simply attach/switch to the existing one."
+in which case, we simply attach/switch to the existing one.
+
+Arguments:
+   <layout_name | file_path>  - Name of a session layout stored in the layouts
+                                directory, or path to a session layout file.
+   <iterm mode>               - When given as \"-CC\" tmux will be called with
+                                the -CC argument enabling iTerm2 integration.
+                                More info: https://iterm2.com"
   exit
 fi
 
 # Provide tmuxifier completions
-if [ "$1" == "--complete" ]; then
+if calling-complete "$@"; then
-  for item in $(tmuxifier-list-sessions); do
+  tmuxifier-list-sessions
-    echo "$item"
-  done
   exit
 fi
 
 if [ -z "$1" ]; then
-  echo "$(tmuxifier-help load-session)" >&2
+  tmuxifier-help load-session "$@" >&2
   exit 1
 fi
 
 # Load runtime functions.
 source "$TMUXIFIER/lib/runtime.sh"
 
+if [ "$2" == "-CC" ]; then
+  export TMUXIFIER_TMUX_ITERM_ATTACH="-CC"
+fi
+
 # Load session file.
 load_session "$1"

libexec/tmuxifier-load-window

@@ -2,33 +2,38 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
 # Provide tmuxifier help
-if [ "$1" == "--help" ]; then
+if calling-help "$@"; then
-  echo "usage: tmuxifier load-window <layout_name>
+  echo "usage: tmuxifier load-window <layout_name | file_path>
 
 Aliases: window, win, w
 
-Create a new window using the specified window layout in the current session."
+Create a new window using the specified window layout in the current session.
+
+Arguments:
+   <layout_name | file_path>  - Name of a window layout stored in the layouts
+                                directory, or path to a window layout file."
   exit
 fi
 
 # Provide tmuxifier completions
-if [ "$1" == "--complete" ]; then
+if calling-complete "$@"; then
-  for item in $(tmuxifier-list-windows); do
+  tmuxifier-list-windows
-    echo "$item"
-  done
   exit
 fi
 
 if [ -z "$1" ]; then
-  echo "$(tmuxifier-help load-window)" >&2
+  tmuxifier-help load-window "$@" >&2
   exit 1
 fi
 
 # Load runtime functions.
 source "$TMUXIFIER/lib/runtime.sh"
 
-if [ ! -z $TMUX ]; then
+if [ ! -z "$TMUX" ]; then
   session="$(tmuxifier-current-session)"
   load_window "$1"
 else

libexec/tmuxifier-new-session

@@ -2,8 +2,11 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
 # Provide tmuxifier help
-if [ "$1" == "--help" ]; then
+if calling-help "$@"; then
   echo "usage: tmuxifier new-session <layout_name>
 
 Aliases: new-ses, nses, ns
@@ -13,15 +16,13 @@ Create a new session layout and open it for editing in \$EDITOR."
 fi
 
 # Provide tmuxifier completions
-if [ "$1" == "--complete" ]; then
+if calling-complete "$@"; then
-  for item in $(tmuxifier-list-sessions); do
+  tmuxifier-list-sessions
-    echo "$item"
-  done
   exit
 fi
 
 if [ -z "$1" ]; then
-  echo "$(tmuxifier-help new-session)" >&2
+  tmuxifier-help new-session "$@" >&2
   exit 1
 fi
 
@@ -45,8 +46,8 @@ fi
 content="$(cat "$template")"
 echo "${content//\{\{SESSION_NAME\}\}/$layout_name}" > "$layout_file"
 
-if [ ! -z "$EDITOR" ]; then
+if [ -n "$EDITOR" ]; then
-  exec "$EDITOR" "$layout_file"
+  exec $EDITOR "$layout_file"
 else
   echo "Layout file has been created, but '\$EDITOR' is not set. Please "
   echo "manually open the layout for editing:"

libexec/tmuxifier-new-window

@@ -2,8 +2,11 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
 # Provide tmuxifier help
-if [ "$1" == "--help" ]; then
+if calling-help "$@"; then
   echo "usage: tmuxifier new-window <layout_name>
 
 Aliases: new-win, nwin, nw
@@ -13,15 +16,13 @@ Create a new window layout and open it for editing in \$EDITOR."
 fi
 
 # Provide tmuxifier completions
-if [ "$1" == "--complete" ]; then
+if calling-complete "$@"; then
-  for item in $(tmuxifier-list-windows); do
+  tmuxifier-list-windows
-    echo "$item"
-  done
   exit
 fi
 
 if [ -z "$1" ]; then
-  echo "$(tmuxifier-help new-window)" >&2
+  tmuxifier-help new-window "$@" >&2
   exit 1
 fi
 
@@ -45,8 +46,8 @@ fi
 content="$(cat "$template")"
 echo "${content//\{\{WINDOW_NAME\}\}/$layout_name}" > "$layout_file"
 
-if [ ! -z "$EDITOR" ]; then
+if [ -n "$EDITOR" ]; then
-  exec "$EDITOR" "$layout_file"
+  exec $EDITOR "$layout_file"
 else
   echo "Layout file has been created, but '\$EDITOR' is not set. Please "
   echo "manually open the layout for editing:"

libexec/tmuxifier-resolve-command-path

@@ -2,8 +2,11 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
 # Provide tmuxifier help
-if [ "$1" == "--help" ]; then
+if calling-help "$@"; then
   echo "usage: tmuxifier resolve-command-path <command_or_alias>
 
 Outputs the absolute path to the given command or command alias."

libexec/tmuxifier-tmux

@@ -0,0 +1,5 @@
+#! /usr/bin/env bash
+set -e
+[ -n "$TMUXIFIER_DEBUG" ] && set -x
+
+tmux $TMUXIFIER_TMUX_OPTS "$@"

libexec/tmuxifier-tmux-version

@@ -0,0 +1,46 @@
+#! /usr/bin/env bash
+shopt -s extglob
+[ -n "$TMUXIFIER_DEBUG" ] && set -x
+
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
+# Provide tmuxifier help
+if calling-help "$@"; then
+  echo "usage: tmuxifier tmux-version [<target-version>]
+
+Outputs current Tmux version. If given optional target-version it outputs one
+of three possible characters indicating if the current Tmux version number is
+equal to, less than, or greater than the <target-version>.
+
+The three possible outputs are \"=\", \"<\", and \">\"."
+  exit
+fi
+
+version=$(tmux -V)
+version=${version/tmux /}
+
+# Fix for tmux next-* versions
+version=${version/next-/}
+
+if [ -z "$1" ]; then
+  echo "$version"
+  exit
+fi
+
+if [ "$version" == "master" ]; then
+  # When version string is "master", tmux was compiled from source, and we
+  # assume it's later than whatever the <target-version> is.
+  echo '>'
+else
+  # Fix for "1.9a" version comparison, as vercomp() can only deal with
+  # purely numeric version numbers.
+  version=${version//+([a-zA-Z])/}
+
+  vercomp "$version" "$1"
+  case $? in
+    0) echo '=' ;;
+    1) echo '>' ;;
+    2) echo '<' ;;
+  esac
+fi

libexec/tmuxifier-version

@@ -2,12 +2,15 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+# Load internal utility functions.
+source "$TMUXIFIER/lib/util.sh"
+
 # Provide tmuxifier help
-if [ "$1" == "--help" ]; then
+if calling-help "$@"; then
   echo "usage: tmuxifier version
 
 Outputs Tmuxifier version."
   exit
 fi
 
-echo "0.6.0"
+echo "0.13.0"

templates/window.sh

@@ -16,7 +16,7 @@ new_window "{{WINDOW_NAME}}"
 
 # Paste text
 #send_keys "top"    # paste into active pane
-#send_keys "date" 1 # paste into active pane
+#send_keys "date" 1 # paste into pane 1
 
 # Set active pane.
 #select_pane 0

test-legacy/lib/env.test.sh

@@ -0,0 +1,33 @@
+#! /usr/bin/env bash
+source "../test-helper.sh"
+
+#
+# env.sh tests.
+#
+
+# Setup.
+realTMUXIFIER="$TMUXIFIER"
+TMUXIFER="/path/to/tmuxifier"
+
+# When TMUXIFIER_LAYOUT_PATH is not set.
+source "${root}/lib/env.sh"
+assert 'echo $TMUXIFIER_LAYOUT_PATH' "${TMUXIFIER}/layouts"
+
+# When TMUXIFIER_LAYOUT_PATH is set and has a trailing slash.
+TMUXIFIER_LAYOUT_PATH="/path/to/layouts/"
+source "${root}/lib/env.sh"
+assert 'echo $TMUXIFIER_LAYOUT_PATH' "/path/to/layouts"
+unset TMUXIFIER_LAYOUT_PATH
+
+# When TMUXIFIER_LAYOUT_PATH is set and does not have a trailing slash.
+TMUXIFIER_LAYOUT_PATH="/path/to/layouts"
+source "${root}/lib/env.sh"
+assert 'echo $TMUXIFIER_LAYOUT_PATH' "/path/to/layouts"
+unset TMUXIFIER_LAYOUT_PATH
+
+# Tear down.
+TMUXIFER="$realTMUXIFIER"
+unset realTMUXIFIER
+
+# End of tests.
+assert_end "env.sh"

test-legacy/lib/layout-helpers/__expand_path.test.sh

@@ -0,0 +1,27 @@
+#! /usr/bin/env bash
+source "../../test-helper.sh"
+source "${root}/lib/layout-helpers.sh"
+
+#
+# __expand_path() tests.
+#
+
+# Setup.
+realHOME="$HOME"
+HOME="/home/test-user"
+
+# When given a path containing "~", it expands "~" to "$HOME".
+assert '__expand_path "~/Foo/Bar"' "${HOME}/Foo/Bar"
+
+# When given a path without "~", it returns path as is.
+assert '__expand_path "/path/to/file"' "/path/to/file"
+
+# When given a path containing spaces, it returns path correctly.
+assert '__expand_path "~/Path To/File"' "${HOME}/Path To/File"
+
+# Tear down.
+HOME="$realHOME"
+unset realHOME
+
+# End of tests.
+assert_end "__expand_path()"

test-legacy/lib/layout-helpers/__get_current_window_index.test.sh

@@ -0,0 +1,48 @@
+#! /usr/bin/env bash
+source "../../test-helper.sh"
+source "${root}/lib/layout-helpers.sh"
+
+#
+# __get_current_window_index() tests.
+#
+
+# When current window is the first and only window.
+create-test-session
+assert "__get_current_window_index" "0"
+kill-test-session
+
+# When creating a second window.
+create-test-session
+test-socket-tmux new-window -t "$session:1"
+assert "__get_current_window_index" "1"
+kill-test-session
+
+# When creating a second window and then switching back to the first window.
+create-test-session
+test-socket-tmux new-window -t "$session:1"
+test-socket-tmux select-window -t "$session:0"
+assert "__get_current_window_index" "0"
+kill-test-session
+
+# When creating multiples windows and switching between them randomly.
+create-test-session
+assert "__get_current_window_index" "0"
+test-socket-tmux new-window -t "$session:1"
+assert "__get_current_window_index" "1"
+test-socket-tmux new-window -t "$session:2"
+assert "__get_current_window_index" "2"
+test-socket-tmux new-window -t "$session:3"
+assert "__get_current_window_index" "3"
+test-socket-tmux select-window -t "$session:1"
+assert "__get_current_window_index" "1"
+test-socket-tmux select-window -t "$session:0"
+assert "__get_current_window_index" "0"
+test-socket-tmux select-window -t "$session:3"
+assert "__get_current_window_index" "3"
+test-socket-tmux select-window -t "$session:2"
+assert "__get_current_window_index" "2"
+kill-test-session
+
+
+# End of tests.
+assert_end "__get_current_window_index()"

test-legacy/lib/layout-helpers/__get_first_window_index.test.sh

@@ -0,0 +1,30 @@
+#! /usr/bin/env bash
+source "../../test-helper.sh"
+source "${root}/lib/layout-helpers.sh"
+
+#
+# __get_first_window_index() tests.
+#
+
+# When first window has a index of 0.
+create-test-session
+assert "__get_first_window_index" "0"
+kill-test-session
+
+# When first window has a index of 1.
+create-test-session
+test-socket-tmux new-window -t "$session:1"
+test-socket-tmux kill-window -t "$session:0"
+assert "__get_first_window_index" "1"
+kill-test-session
+
+# When first window has a index of 2.
+create-test-session
+test-socket-tmux new-window -t "$session:2"
+test-socket-tmux kill-window -t "$session:0"
+assert "__get_first_window_index" "2"
+kill-test-session
+
+
+# End of tests.
+assert_end "__get_first_window_index()"

test-legacy/lib/layout-helpers/__go_to_session.test.sh

@@ -0,0 +1,42 @@
+#! /usr/bin/env bash
+source "../../test-helper.sh"
+source "${root}/lib/layout-helpers.sh"
+
+#
+# __go_to_session() tests.
+#
+
+# Setup.
+session="tmuxifier-test-session"
+
+# When TMUX is not set, attach to $session.
+stub tmuxifier-tmux
+__go_to_session
+assert_raises \
+  "stub_called_with tmuxifier-tmux -u attach-session -t \"${session}:\"" 0
+restore tmuxifier-tmux
+
+# When TMUXIFIER_TMUX_ITERM_ATTACH is set, pass it in as first argument(s) to
+# tmuxifier-tmux
+TMUXIFIER_TMUX_ITERM_ATTACH="-CC"
+stub tmuxifier-tmux
+__go_to_session
+assert_raises \
+  "stub_called_with tmuxifier-tmux -CC -u attach-session -t \"${session}:\"" 0
+restore tmuxifier-tmux
+unset TMUXIFIER_TMUX_ITERM_ATTACH
+
+# When TMUX is set, switch to $session.
+TMUX="/tmp/tmux-501/default,1203,0"
+stub tmuxifier-tmux
+__go_to_session
+assert_raises \
+  "stub_called_with tmuxifier-tmux -u switch-client -t \"${session}:\"" 0
+restore tmuxifier-tmux
+unset TMUX
+
+# Tear down.
+unset session
+
+# End of tests.
+assert_end "__go_to_session()"

test-legacy/lib/layout-helpers/__go_to_window_or_session_path.test.sh

@@ -0,0 +1,88 @@
+#! /usr/bin/env bash
+source "../../test-helper.sh"
+source "${root}/lib/layout-helpers.sh"
+
+#
+# __go_to_window_or_session_path() tests.
+#
+
+# When neither $window_root or $session_root are set, does nothing.
+stub run_cmd
+__go_to_window_or_session_path
+assert "stub_called_times run_cmd" "0"
+restore run_cmd
+
+
+# When only $window_root is set, runs cd to $window_root path.
+stub run_cmd
+window_root="/tmp"
+__go_to_window_or_session_path
+assert 'stub_called_with_times run_cmd cd \"/tmp\"' "1"
+assert 'stub_called_with_times run_cmd clear' "1"
+unset window_root
+restore run_cmd
+
+
+# When only $TMUXIFIER_SESSION_ROOT is set, runs cd to $TMUXIFIER_SESSION_ROOT
+# path.
+stub run_cmd
+TMUXIFIER_SESSION_ROOT="/opt"
+__go_to_window_or_session_path
+assert 'stub_called_with_times run_cmd cd \"/opt\"' "1"
+assert 'stub_called_with_times run_cmd clear' "1"
+unset TMUXIFIER_SESSION_ROOT
+restore run_cmd
+
+
+# When only $session_root is set, runs cd to $session_root path.
+stub run_cmd
+session_root="/usr"
+__go_to_window_or_session_path
+assert 'stub_called_with_times run_cmd cd \"/usr\"' "1"
+assert 'stub_called_with_times run_cmd clear' "1"
+unset session_root
+restore run_cmd
+
+
+# When $window_root and $session_root are set, runs cd to $window_root path.
+stub run_cmd
+window_root="/tmp"
+session_root="/usr"
+__go_to_window_or_session_path
+assert 'stub_called_with_times run_cmd cd \"/tmp\"' "1"
+assert 'stub_called_with_times run_cmd clear' "1"
+unset window_root
+unset session_root
+restore run_cmd
+
+
+# When $TMUXIFIER_SESSION_ROOT and $session_root are set, runs cd to
+# $TMUXIFIER_SESSION_ROOT path.
+stub run_cmd
+TMUXIFIER_SESSION_ROOT="/opt"
+session_root="/usr"
+__go_to_window_or_session_path
+assert 'stub_called_with_times run_cmd cd \"/opt\"' "1"
+assert 'stub_called_with_times run_cmd clear' "1"
+unset TMUXIFIER_SESSION_ROOT
+unset session_root
+restore run_cmd
+
+
+# When $window_root, $TMUXIFIER_SESSION_ROOT, and $session_root are set, runs
+# cd to $window_root path.
+stub run_cmd
+window_root="/tmp"
+TMUXIFIER_SESSION_ROOT="/opt"
+session_root="/usr"
+__go_to_window_or_session_path
+assert 'stub_called_with_times run_cmd cd \"/tmp\"' "1"
+assert 'stub_called_with_times run_cmd clear' "1"
+unset window_root
+unset TMUXIFIER_SESSION_ROOT
+unset session_root
+restore run_cmd
+
+
+# End of tests.
+assert_end "__go_to_window_or_session_path()"

test-legacy/lib/layout-helpers/new_window.test.sh

@@ -0,0 +1,59 @@
+#! /usr/bin/env bash
+source "../../test-helper.sh"
+source "${root}/lib/layout-helpers.sh"
+
+#
+# new_window() tests.
+#
+
+# When called without arguments, creates new window.
+create-test-session
+stub __go_to_window_or_session_path
+assert "test-socket-window-count" "1"
+new_window
+assert "test-socket-window-count" "2"
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+kill-test-session
+
+# When called with name argument, creates new window with specified name.
+create-test-session
+stub __go_to_window_or_session_path
+assert "test-socket-window-count yippieezzz" "0"
+new_window "yippieezzz"
+assert "test-socket-window-count" "2"
+assert "test-socket-window-count yippieezzz" "1"
+restore __go_to_window_or_session_path
+kill-test-session
+
+# When called with name and command argument, creates new window with
+# specified name and executes given command.
+rm "/tmp/tmuxifier-new_window-test" &> /dev/null
+create-test-session
+stub __go_to_window_or_session_path
+new_window "foobardoo" "touch /tmp/tmuxifier-new_window-test; bash"
+assert "test-socket-window-count" "2"
+assert "test-socket-window-count foobardoo" "1"
+sleep 0.1 # attempt to avoid timing issue causing flicker
+assert_raises 'test -f "/tmp/tmuxifier-new_window-test"' 0
+restore __go_to_window_or_session_path
+kill-test-session
+rm "/tmp/tmuxifier-new_window-test" &> /dev/null
+
+# When called ensure it sets the $window variable to the index of the newly
+# created window.
+unset window
+create-test-session
+stub __go_to_window_or_session_path
+new_window "foo"
+assert "echo $window" "1"
+new_window
+assert "echo $window" "2"
+new_window "bar"
+assert "echo $window" "3"
+restore __go_to_window_or_session_path
+kill-test-session
+unset window
+
+# End of tests.
+assert_end "new_window()"

test-legacy/lib/layout-helpers/select_window.test.sh

@@ -0,0 +1,55 @@
+#! /usr/bin/env bash
+source "../../test-helper.sh"
+source "${root}/lib/layout-helpers.sh"
+
+#
+# select_window() tests.
+#
+
+window_list() {
+  test-socket-tmux list-windows -t "$session:" \
+    -F "#{window_active}:#{window_index}" 2>/dev/null
+}
+
+# Selects given window when passed a window index
+create-test-session
+test-socket-tmux new-window -t "$session:1"
+test-socket-tmux new-window -t "$session:2"
+select_window 0
+assert "window_list | grep '^1:'" "1:0"
+select_window 1
+assert "window_list | grep '^1:'" "1:1"
+select_window 2
+assert "window_list | grep '^1:'" "1:2"
+kill-test-session
+
+# Selects given window when passed a window name
+create-test-session
+test-socket-tmux new-window -t "$session:1" -n "foo"
+test-socket-tmux new-window -t "$session:2" -n "bar"
+select_window foo
+assert "window_list | grep '^1:'" "1:1"
+select_window bar
+assert "window_list | grep '^1:'" "1:2"
+kill-test-session
+
+
+# When called ensure it sets the $window variable to the index of the newly
+# created window.
+unset window
+create-test-session
+test-socket-tmux new-window -t "$session:1" -n "foo"
+test-socket-tmux new-window -t "$session:2" -n "bar"
+select_window "foo"
+assert "echo $window" "1"
+select_window "bar"
+assert "echo $window" "2"
+select_window 1
+assert "echo $window" "1"
+select_window 2
+assert "echo $window" "2"
+kill-test-session
+unset window
+
+# End of tests.
+assert_end "select_window()"

test-legacy/lib/layout-helpers/split_h.test.sh

@@ -0,0 +1,70 @@
+#! /usr/bin/env bash
+source "../../test-helper.sh"
+source "${root}/lib/layout-helpers.sh"
+
+#
+# split_h() tests.
+#
+
+# When called without arguments, calls tmuxifier-tmux split-window with -h flag.
+session="test-session"
+window="0"
+stub tmuxifier-tmux
+stub __go_to_window_or_session_path
+split_h
+assert_raises \
+  "stub_called_with tmuxifier-tmux split-window -t test-session:0. -h" 0
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+restore tmuxifier-tmux
+
+# When called with percentage argument, includes -p flag.
+session="test-session"
+window="0"
+stub tmuxifier-tmux
+stub __go_to_window_or_session_path
+split_h 30
+assert_raises \
+  "stub_called_with tmuxifier-tmux split-window -t test-session:0. -h -p 30" 0
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+restore tmuxifier-tmux
+
+# When called with percentage and target pane, targets that pane.
+session="mysession"
+window="2"
+stub tmuxifier-tmux
+stub __go_to_window_or_session_path
+split_h 50 1
+assert_raises \
+  "stub_called_with tmuxifier-tmux split-window -t mysession:2.1 -h -p 50" 0
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+restore tmuxifier-tmux
+
+# When called with only target pane (empty percentage), targets that pane.
+session="test"
+window="1"
+stub tmuxifier-tmux
+stub __go_to_window_or_session_path
+split_h "" 2
+assert_raises \
+  "stub_called_with tmuxifier-tmux split-window -t test:1.2 -h" 0
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+restore tmuxifier-tmux
+
+# Integration: actually splits pane in tmux session.
+create-test-session
+window="0"
+stub __go_to_window_or_session_path
+assert "test-socket-pane-count" "1"
+split_h
+assert "test-socket-pane-count" "2"
+split_h 30
+assert "test-socket-pane-count" "3"
+restore __go_to_window_or_session_path
+kill-test-session
+
+# End of tests.
+assert_end "split_h()"

test-legacy/lib/layout-helpers/split_hl.test.sh

@@ -0,0 +1,70 @@
+#! /usr/bin/env bash
+source "../../test-helper.sh"
+source "${root}/lib/layout-helpers.sh"
+
+#
+# split_hl() tests.
+#
+
+# When called without arguments, calls tmuxifier-tmux split-window with -h flag.
+session="test-session"
+window="0"
+stub tmuxifier-tmux
+stub __go_to_window_or_session_path
+split_hl
+assert_raises \
+  "stub_called_with tmuxifier-tmux split-window -t test-session:0. -h" 0
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+restore tmuxifier-tmux
+
+# When called with column count argument, includes -l flag.
+session="test-session"
+window="0"
+stub tmuxifier-tmux
+stub __go_to_window_or_session_path
+split_hl 20
+assert_raises \
+  "stub_called_with tmuxifier-tmux split-window -t test-session:0. -h -l 20" 0
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+restore tmuxifier-tmux
+
+# When called with column count and target pane, targets that pane.
+session="mysession"
+window="2"
+stub tmuxifier-tmux
+stub __go_to_window_or_session_path
+split_hl 25 1
+assert_raises \
+  "stub_called_with tmuxifier-tmux split-window -t mysession:2.1 -h -l 25" 0
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+restore tmuxifier-tmux
+
+# When called with only target pane (empty column count), targets that pane.
+session="test"
+window="1"
+stub tmuxifier-tmux
+stub __go_to_window_or_session_path
+split_hl "" 2
+assert_raises \
+  "stub_called_with tmuxifier-tmux split-window -t test:1.2 -h" 0
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+restore tmuxifier-tmux
+
+# Integration: actually splits pane in tmux session.
+create-test-session
+window="0"
+stub __go_to_window_or_session_path
+assert "test-socket-pane-count" "1"
+split_hl
+assert "test-socket-pane-count" "2"
+split_hl 10
+assert "test-socket-pane-count" "3"
+restore __go_to_window_or_session_path
+kill-test-session
+
+# End of tests.
+assert_end "split_hl()"

test-legacy/lib/layout-helpers/split_v.test.sh

@@ -0,0 +1,70 @@
+#! /usr/bin/env bash
+source "../../test-helper.sh"
+source "${root}/lib/layout-helpers.sh"
+
+#
+# split_v() tests.
+#
+
+# When called without arguments, calls tmuxifier-tmux split-window with -v flag.
+session="test-session"
+window="0"
+stub tmuxifier-tmux
+stub __go_to_window_or_session_path
+split_v
+assert_raises \
+  "stub_called_with tmuxifier-tmux split-window -t test-session:0. -v" 0
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+restore tmuxifier-tmux
+
+# When called with percentage argument, includes -p flag.
+session="test-session"
+window="0"
+stub tmuxifier-tmux
+stub __go_to_window_or_session_path
+split_v 30
+assert_raises \
+  "stub_called_with tmuxifier-tmux split-window -t test-session:0. -v -p 30" 0
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+restore tmuxifier-tmux
+
+# When called with percentage and target pane, targets that pane.
+session="mysession"
+window="2"
+stub tmuxifier-tmux
+stub __go_to_window_or_session_path
+split_v 50 1
+assert_raises \
+  "stub_called_with tmuxifier-tmux split-window -t mysession:2.1 -v -p 50" 0
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+restore tmuxifier-tmux
+
+# When called with only target pane (empty percentage), targets that pane.
+session="test"
+window="1"
+stub tmuxifier-tmux
+stub __go_to_window_or_session_path
+split_v "" 2
+assert_raises \
+  "stub_called_with tmuxifier-tmux split-window -t test:1.2 -v" 0
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+restore tmuxifier-tmux
+
+# Integration: actually splits pane in tmux session.
+create-test-session
+window="0"
+stub __go_to_window_or_session_path
+assert "test-socket-pane-count" "1"
+split_v
+assert "test-socket-pane-count" "2"
+split_v 30
+assert "test-socket-pane-count" "3"
+restore __go_to_window_or_session_path
+kill-test-session
+
+# End of tests.
+assert_end "split_v()"

test-legacy/lib/layout-helpers/split_vl.test.sh

@@ -0,0 +1,70 @@
+#! /usr/bin/env bash
+source "../../test-helper.sh"
+source "${root}/lib/layout-helpers.sh"
+
+#
+# split_vl() tests.
+#
+
+# When called without arguments, calls tmuxifier-tmux split-window with -v flag.
+session="test-session"
+window="0"
+stub tmuxifier-tmux
+stub __go_to_window_or_session_path
+split_vl
+assert_raises \
+  "stub_called_with tmuxifier-tmux split-window -t test-session:0. -v" 0
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+restore tmuxifier-tmux
+
+# When called with line count argument, includes -l flag.
+session="test-session"
+window="0"
+stub tmuxifier-tmux
+stub __go_to_window_or_session_path
+split_vl 10
+assert_raises \
+  "stub_called_with tmuxifier-tmux split-window -t test-session:0. -v -l 10" 0
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+restore tmuxifier-tmux
+
+# When called with line count and target pane, targets that pane.
+session="mysession"
+window="2"
+stub tmuxifier-tmux
+stub __go_to_window_or_session_path
+split_vl 15 1
+assert_raises \
+  "stub_called_with tmuxifier-tmux split-window -t mysession:2.1 -v -l 15" 0
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+restore tmuxifier-tmux
+
+# When called with only target pane (empty line count), targets that pane.
+session="test"
+window="1"
+stub tmuxifier-tmux
+stub __go_to_window_or_session_path
+split_vl "" 2
+assert_raises \
+  "stub_called_with tmuxifier-tmux split-window -t test:1.2 -v" 0
+assert "stub_called_times __go_to_window_or_session_path" "1"
+restore __go_to_window_or_session_path
+restore tmuxifier-tmux
+
+# Integration: actually splits pane in tmux session.
+create-test-session
+window="0"
+stub __go_to_window_or_session_path
+assert "test-socket-pane-count" "1"
+split_vl
+assert "test-socket-pane-count" "2"
+split_vl 5
+assert "test-socket-pane-count" "3"
+restore __go_to_window_or_session_path
+kill-test-session
+
+# End of tests.
+assert_end "split_vl()"

test-legacy/lib/layout-helpers/tmux.test.sh

@@ -0,0 +1,20 @@
+#! /usr/bin/env bash
+source "../../test-helper.sh"
+source "${root}/lib/layout-helpers.sh"
+
+#
+# tmux() tests.
+#
+
+# Passes all arguments to tmuxifier-tmux.
+stub tmuxifier-tmux
+tmux -V
+tmux --help
+tmux new -s dude
+assert_raises "stub_called_with tmuxifier-tmux -V" 0
+assert_raises "stub_called_with tmuxifier-tmux --help" 0
+assert_raises "stub_called_with tmuxifier-tmux new -s dude" 0
+restore tmuxifier-tmux
+
+# End of tests.
+assert_end "tmux()"

test-legacy/lib/runtime.test.sh

@@ -0,0 +1,23 @@
+#! /usr/bin/env bash
+source "../test-helper.sh"
+
+#
+# runtime.sh tests.
+#
+
+source "${root}/lib/runtime.sh"
+
+# We assume env.sh has been sourced if $TMUXIFIER_LAYOUT_PATH has been set.
+assert 'echo $TMUXIFIER_LAYOUT_PATH' "${TMUXIFIER}/layouts"
+
+# We ensure $session_root is set to $HOME by default.
+assert 'echo $session_root' "$HOME"
+
+# We assume layout-helpers.sh has been sourced if a few of them are available.
+for helper in new_window split_v split_h select_window select_pane; do
+  assert "type $helper | head -1" "$helper is a function"
+done
+
+
+# End of tests.
+assert_end "runtime.sh"

test-legacy/lib/util.test.sh

@@ -0,0 +1,58 @@
+#! /usr/bin/env bash
+source "../test-helper.sh"
+source "${root}/lib/util.sh"
+
+#
+# calling-help() tests.
+#
+
+# Returns 0 when "--help" is part of passed arguments.
+assert_raises 'calling-help --help' 0
+assert_raises 'calling-help foo --help' 0
+assert_raises 'calling-help --help bar' 0
+assert_raises 'calling-help foo --help bar' 0
+
+# Returns 0 when "-h" is part of passed arguments.
+assert_raises 'calling-help -h' 0
+assert_raises 'calling-help foo -h' 0
+assert_raises 'calling-help -h bar' 0
+assert_raises 'calling-help foo -h bar' 0
+
+# Returns 1 when neither "--help" or "-h" is not part of passed arguments.
+assert_raises 'calling-help' 1
+assert_raises 'calling-help foo' 1
+assert_raises 'calling-help foo bar' 1
+
+# Returns 1 when "--help" is part of passed arguments, but not free-standing.
+assert_raises 'calling-help --help-me' 1
+assert_raises 'calling-help foo--help' 1
+
+# Returns 1 when "-h" is part of passed arguments, but not free-standing.
+assert_raises 'calling-help -hj' 1
+assert_raises 'calling-help welcome-home' 1
+
+# End of tests.
+assert_end "calling-help()"
+
+
+#
+# calling-complete() tests.
+#
+
+# Returns 0 when "--complete" is part of passed arguments.
+assert_raises 'calling-complete --complete' 0
+assert_raises 'calling-complete foo --complete' 0
+assert_raises 'calling-complete --complete bar' 0
+assert_raises 'calling-complete foo --complete bar' 0
+
+# Returns 1 when "--complete" is not part of passed arguments.
+assert_raises 'calling-complete' 1
+assert_raises 'calling-complete foo' 1
+assert_raises 'calling-complete foo bar' 1
+
+# Returns 1 when "--complete" is part of passed arguments, but not free-standing.
+assert_raises 'calling-complete --complete-me' 1
+assert_raises 'calling-complete foo--complete' 1
+
+# End of tests.
+assert_end "calling-complete()"

test-legacy/libexec/tmuxifier-tmux.test.sh

@@ -0,0 +1,22 @@
+#! /usr/bin/env bash
+source "../test-helper.sh"
+source "${root}/lib/util.sh"
+
+#
+# tmuxifier-tmux tests.
+#
+
+# Setup.
+test-socket-tmux new-session -d -s foobar
+test-socket-tmux new-session -d -s dude
+baseCommand="${root}/bin/tmuxifier tmux"
+
+# Passes all arguments to Tmux.
+assert "${baseCommand} list-sessions -F \"- #{session_name}\"" \
+       "- dude\n- foobar"
+
+# Tear down.
+kill-test-server
+
+# End of tests.
+assert_end "tmuxifier-tmux"

test-legacy/test-helper.sh

@@ -0,0 +1,91 @@
+[ -n "$TEST_DEBUG" ] && set -x
+
+resolve_link() {
+  $(type -p greadlink readlink | head -1) $1
+}
+
+abs_dirname() {
+  local cwd="$(pwd)"
+  local path="$1"
+
+  while [ -n "$path" ]; do
+    cd "${path%/*}"
+    local name="${path##*/}"
+    path="$(resolve_link "$name" || true)"
+  done
+
+  pwd
+  cd "$cwd"
+}
+
+# Find and store path to Tmux binary.
+TMUX_BIN="$(command -v tmux)"
+
+# Set testroot variable.
+testroot="$(abs_dirname "$BASH_SOURCE")"
+
+# Set root variable.
+root="$(abs_dirname "$testroot/../..")"
+
+# Set TMUXIFIER environment variable.
+TMUXIFIER="$root"
+
+# Setup PATH environment variable.
+PATH="$root/bin:$root/libexec:$PATH"
+
+# Unset TMUX environment variable, tests assume they're not running within
+# Tmux.
+unset TMUX
+
+# Unset various Tmuxifier environment variables to prevent a local install of
+# Tmuxifier interfering with tests.
+unset TMUXIFIER_LAYOUT_PATH
+unset TMUXIFIER_TMUX_OPTS
+unset TMUXIFIER_NO_COMPLETE
+
+# Include assert.sh and stub.sh libraries.
+source "${testroot}/assert.sh"
+source "${testroot}/stub.sh"
+
+#
+# Test Helpers
+#
+
+test-socket-tmux() {
+  export TMUXIFIER_TMUX_OPTS="-L tmuxifier-tests"
+  "$TMUX_BIN" $TMUXIFIER_TMUX_OPTS "$@"
+}
+
+create-test-session() {
+  session="$1"
+  if [ -z "$session" ]; then session="test"; fi
+
+  test-socket-tmux new-session -d -s "$session"
+}
+
+kill-test-session() {
+  local target="$1"
+  if [ -z "$target" ]; then target="$session"; fi
+
+  test-socket-tmux kill-session -t "$target"
+}
+
+kill-test-server() {
+  test-socket-tmux kill-server
+  unset TMUXIFIER_TMUX_OPTS
+  unset session
+}
+
+test-socket-window-count() {
+  local list="$(test-socket-tmux list-windows)"
+  if [ -n "$1" ]; then
+    echo "$list" | grep $1 | wc -l | awk '{print $1}'
+  else
+    echo "$list" | wc -l | awk '{print $1}'
+  fi
+}
+
+test-socket-pane-count() {
+  local list="$(test-socket-tmux list-panes -t "$session:")"
+  echo "$list" | wc -l | awk '{print $1}'
+}

tests/bootstrap.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -euo pipefail
+# Place your common test setup here
+
+# Resolve the project root directory
+_test_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+_root_dir="$(cd "${_test_dir}/.." && pwd)"
+
+# Set TMUXIFIER so libexec commands can find lib/util.sh
+export TMUXIFIER="${_root_dir}"
+
+# Add libexec to PATH so tmuxifier commands are available
+export PATH="${_root_dir}/libexec:${PATH}"

tests/lib/layout-helpers/__get_current_window_index_test.sh

@@ -0,0 +1,209 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# __get_current_window_index() tests
+#
+
+function set_up() {
+  # Reset session variable to known state
+  session=""
+}
+
+function tear_down() {
+  unset session
+}
+
+#
+# Basic functionality
+#
+
+function test_get_current_window_index_returns_active_window_index() {
+  session="test-session"
+  mock tmuxifier-tmux << EOF
+1:0
+0:1
+0:2
+EOF
+
+  local result
+  result=$(__get_current_window_index)
+
+  assert_same "0" "$result"
+}
+
+function test_get_current_window_index_returns_index_when_second_window_active() {
+  session="test-session"
+  mock tmuxifier-tmux << EOF
+0:0
+1:1
+0:2
+EOF
+
+  local result
+  result=$(__get_current_window_index)
+
+  assert_same "1" "$result"
+}
+
+function test_get_current_window_index_returns_index_when_last_window_active() {
+  session="test-session"
+  mock tmuxifier-tmux << EOF
+0:0
+0:1
+1:2
+EOF
+
+  local result
+  result=$(__get_current_window_index)
+
+  assert_same "2" "$result"
+}
+
+#
+# Non-standard window indices
+#
+
+function test_get_current_window_index_handles_non_zero_base_index() {
+  session="test-session"
+  # When base-index is 1
+  mock tmuxifier-tmux << EOF
+1:1
+0:2
+0:3
+EOF
+
+  local result
+  result=$(__get_current_window_index)
+
+  assert_same "1" "$result"
+}
+
+function test_get_current_window_index_handles_high_window_index() {
+  session="test-session"
+  mock tmuxifier-tmux << EOF
+0:0
+0:1
+1:999
+EOF
+
+  local result
+  result=$(__get_current_window_index)
+
+  assert_same "999" "$result"
+}
+
+function test_get_current_window_index_handles_gaps_in_window_indices() {
+  session="test-session"
+  # Windows 0, 5, 10 with window 5 being active
+  mock tmuxifier-tmux << EOF
+0:0
+1:5
+0:10
+EOF
+
+  local result
+  result=$(__get_current_window_index)
+
+  assert_same "5" "$result"
+}
+
+#
+# Single window
+#
+
+function test_get_current_window_index_returns_index_for_single_window() {
+  session="test-session"
+  mock tmuxifier-tmux echo "1:0"
+
+  local result
+  result=$(__get_current_window_index)
+
+  assert_same "0" "$result"
+}
+
+function test_get_current_window_index_returns_index_for_single_window_non_zero() {
+  session="test-session"
+  mock tmuxifier-tmux echo "1:5"
+
+  local result
+  result=$(__get_current_window_index)
+
+  assert_same "5" "$result"
+}
+
+#
+# Edge cases and error handling
+#
+
+function test_get_current_window_index_returns_empty_when_no_active_window() {
+  session="test-session"
+  # No window marked as active (shouldn't happen in practice)
+  mock tmuxifier-tmux << EOF
+0:0
+0:1
+0:2
+EOF
+
+  local result
+  result=$(__get_current_window_index)
+
+  assert_empty "$result"
+}
+
+function test_get_current_window_index_returns_empty_when_no_windows() {
+  session="test-session"
+  mock tmuxifier-tmux echo ""
+
+  local result
+  result=$(__get_current_window_index)
+
+  assert_empty "$result"
+}
+
+function test_get_current_window_index_returns_empty_on_tmux_error() {
+  session="test-session"
+  # Simulate tmux error (stderr is redirected to /dev/null in the function)
+  mock tmuxifier-tmux return 1
+
+  local result
+  result=$(__get_current_window_index)
+
+  assert_empty "$result"
+}
+
+#
+# Tmux command verification
+#
+
+function test_get_current_window_index_calls_tmux_with_correct_args() {
+  session="my-session"
+  spy tmuxifier-tmux
+
+  __get_current_window_index
+
+  assert_have_been_called_with tmuxifier-tmux \
+    "list-windows -t my-session: -F #{window_active}:#{window_index}"
+}
+
+function test_get_current_window_index_uses_session_variable() {
+  session="another-session"
+  spy tmuxifier-tmux
+
+  __get_current_window_index
+
+  assert_have_been_called_with tmuxifier-tmux \
+    "list-windows -t another-session: -F #{window_active}:#{window_index}"
+}
+
+function test_get_current_window_index_handles_special_session_names() {
+  session="my-project_v2"
+  spy tmuxifier-tmux
+
+  __get_current_window_index
+
+  assert_have_been_called_with tmuxifier-tmux \
+    "list-windows -t my-project_v2: -F #{window_active}:#{window_index}"
+}

tests/lib/layout-helpers/__get_first_window_index_test.sh

@@ -0,0 +1,146 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# __get_first_window_index() tests
+#
+
+function set_up() {
+  # Reset session variable to known state
+  session=""
+}
+
+function tear_down() {
+  unset session
+}
+
+#
+# Return value behavior
+#
+
+function test_get_first_window_index_returns_first_index_from_list() {
+  session="test-session"
+  mock tmuxifier-tmux echo "0"
+
+  local result
+  result=$(__get_first_window_index)
+
+  assert_same "0" "$result"
+}
+
+function test_get_first_window_index_returns_first_of_multiple_indices() {
+  session="test-session"
+  mock tmuxifier-tmux echo $'1\n2\n3'
+
+  local result
+  result=$(__get_first_window_index)
+
+  assert_same "1" "$result"
+}
+
+function test_get_first_window_index_returns_0_when_list_empty() {
+  session="test-session"
+  mock tmuxifier-tmux echo ""
+
+  local result
+  result=$(__get_first_window_index)
+
+  assert_same "0" "$result"
+}
+
+function test_get_first_window_index_returns_0_when_command_fails() {
+  session="test-session"
+  # Simulate tmux command failure by returning nothing
+  mock tmuxifier-tmux true
+
+  local result
+  result=$(__get_first_window_index)
+
+  assert_same "0" "$result"
+}
+
+#
+# Non-zero first window index
+#
+
+function test_get_first_window_index_handles_nonzero_first_index() {
+  session="test-session"
+  mock tmuxifier-tmux echo "5"
+
+  local result
+  result=$(__get_first_window_index)
+
+  assert_same "5" "$result"
+}
+
+function test_get_first_window_index_returns_first_even_when_not_sequential() {
+  session="test-session"
+  # Simulate windows at indices 3, 7, 12
+  mock tmuxifier-tmux echo $'3\n7\n12'
+
+  local result
+  result=$(__get_first_window_index)
+
+  assert_same "3" "$result"
+}
+
+#
+# Session target format
+#
+
+function test_get_first_window_index_uses_session_variable() {
+  session="my-project"
+  spy tmuxifier-tmux
+
+  __get_first_window_index > /dev/null
+
+  assert_have_been_called_with tmuxifier-tmux \
+    "list-windows -t my-project: -F #{window_index}"
+}
+
+function test_get_first_window_index_includes_trailing_colon_in_target() {
+  session="test"
+  spy tmuxifier-tmux
+
+  __get_first_window_index > /dev/null
+
+  # Verify the -t argument includes trailing colon
+  assert_have_been_called_with tmuxifier-tmux \
+    "list-windows -t test: -F #{window_index}"
+}
+
+#
+# Edge cases
+#
+
+function test_get_first_window_index_handles_session_with_special_chars() {
+  session="my-project_v2"
+  spy tmuxifier-tmux
+
+  __get_first_window_index > /dev/null
+
+  assert_have_been_called_with tmuxifier-tmux \
+    "list-windows -t my-project_v2: -F #{window_index}"
+}
+
+function test_get_first_window_index_handles_high_window_index() {
+  session="test-session"
+  mock tmuxifier-tmux echo "999"
+
+  local result
+  result=$(__get_first_window_index)
+
+  assert_same "999" "$result"
+}
+
+function test_get_first_window_index_handles_empty_session_name() {
+  session=""
+  spy tmuxifier-tmux
+
+  __get_first_window_index > /dev/null
+
+  assert_have_been_called_with tmuxifier-tmux \
+    "list-windows -t : -F #{window_index}"
+}

tests/lib/layout-helpers/__go_to_window_or_session_path_test.sh

@@ -0,0 +1,197 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# __go_to_window_or_session_path() tests
+#
+
+function set_up() {
+  # Reset all path-related variables before each test
+  window_root=""
+  session_root=""
+  TMUXIFIER_SESSION_ROOT=""
+
+  # Default session and window for run_cmd context
+  session="test-session"
+  window="0"
+}
+
+function tear_down() {
+  unset window_root session_root TMUXIFIER_SESSION_ROOT
+  unset session window
+}
+
+#
+# No path set
+#
+
+function test_does_nothing_when_no_paths_set() {
+  spy run_cmd
+
+  __go_to_window_or_session_path
+
+  assert_not_called run_cmd
+}
+
+function test_does_nothing_with_empty_string_paths() {
+  window_root=""
+  session_root=""
+  TMUXIFIER_SESSION_ROOT=""
+  spy run_cmd
+
+  __go_to_window_or_session_path
+
+  assert_not_called run_cmd
+}
+
+#
+# Single path set
+#
+
+function test_uses_session_root_when_only_session_root_is_set() {
+  session_root="/path/to/session"
+  spy run_cmd
+
+  __go_to_window_or_session_path
+
+  assert_have_been_called_times 2 run_cmd
+  assert_have_been_called_with run_cmd ' cd "/path/to/session"' 1
+  assert_have_been_called_with run_cmd ' clear' 2
+}
+
+function test_uses_tmuxifier_session_root_when_only_env_var_is_set() {
+  TMUXIFIER_SESSION_ROOT="/path/from/env"
+  spy run_cmd
+
+  __go_to_window_or_session_path
+
+  assert_have_been_called_times 2 run_cmd
+  assert_have_been_called_with run_cmd ' cd "/path/from/env"' 1
+  assert_have_been_called_with run_cmd ' clear' 2
+}
+
+function test_uses_window_root_when_only_window_root_is_set() {
+  window_root="/path/to/window"
+  spy run_cmd
+
+  __go_to_window_or_session_path
+
+  assert_have_been_called_times 2 run_cmd
+  assert_have_been_called_with run_cmd ' cd "/path/to/window"' 1
+  assert_have_been_called_with run_cmd ' clear' 2
+}
+
+#
+# Priority: window_root > TMUXIFIER_SESSION_ROOT > session_root
+#
+
+function test_window_root_takes_priority_over_session_root() {
+  window_root="/window/path"
+  session_root="/session/path"
+  spy run_cmd
+
+  __go_to_window_or_session_path
+
+  assert_have_been_called_with run_cmd ' cd "/window/path"' 1
+}
+
+function test_tmuxifier_session_root_takes_priority_over_session_root() {
+  TMUXIFIER_SESSION_ROOT="/env/path"
+  session_root="/session/path"
+  spy run_cmd
+
+  __go_to_window_or_session_path
+
+  assert_have_been_called_with run_cmd ' cd "/env/path"' 1
+}
+
+function test_window_root_takes_priority_over_tmuxifier_session_root() {
+  window_root="/window/path"
+  TMUXIFIER_SESSION_ROOT="/env/path"
+  spy run_cmd
+
+  __go_to_window_or_session_path
+
+  assert_have_been_called_with run_cmd ' cd "/window/path"' 1
+}
+
+function test_window_root_takes_priority_over_all_other_paths() {
+  window_root="/window/path"
+  TMUXIFIER_SESSION_ROOT="/env/path"
+  session_root="/session/path"
+  spy run_cmd
+
+  __go_to_window_or_session_path
+
+  assert_have_been_called_with run_cmd ' cd "/window/path"' 1
+}
+
+#
+# Command format
+#
+
+function test_cd_command_has_leading_space_for_history_suppression() {
+  session_root="/some/path"
+  spy run_cmd
+
+  __go_to_window_or_session_path
+
+  # Leading space prevents command from being saved in shell history
+  assert_have_been_called_with run_cmd ' cd "/some/path"' 1
+}
+
+function test_clear_command_has_leading_space_for_history_suppression() {
+  session_root="/some/path"
+  spy run_cmd
+
+  __go_to_window_or_session_path
+
+  # Leading space prevents command from being saved in shell history
+  assert_have_been_called_with run_cmd ' clear' 2
+}
+
+function test_path_is_quoted_in_cd_command() {
+  session_root="/path/with spaces/in it"
+  spy run_cmd
+
+  __go_to_window_or_session_path
+
+  # Path should be quoted to handle spaces
+  assert_have_been_called_with run_cmd ' cd "/path/with spaces/in it"' 1
+}
+
+#
+# Edge cases
+#
+
+function test_handles_path_with_special_characters() {
+  session_root="/path/with\$pecial-chars_123"
+  spy run_cmd
+
+  __go_to_window_or_session_path
+
+  assert_have_been_called_with run_cmd ' cd "/path/with$pecial-chars_123"' 1
+}
+
+function test_handles_home_directory_path() {
+  session_root="$HOME"
+  spy run_cmd
+
+  __go_to_window_or_session_path
+
+  assert_have_been_called_with run_cmd " cd \"$HOME\"" 1
+}
+
+function test_always_calls_clear_after_cd() {
+  window_root="/any/path"
+  spy run_cmd
+
+  __go_to_window_or_session_path
+
+  # Verify order: cd first, then clear
+  assert_have_been_called_times 2 run_cmd
+  assert_have_been_called_with run_cmd ' cd "/any/path"' 1
+  assert_have_been_called_with run_cmd ' clear' 2
+}

tests/lib/layout-helpers/balance_windows_horizontal_test.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# balance_windows_horizontal() tests
+#
+
+function set_up() {
+  # Default session and window for tests
+  session="test-session"
+  window="0"
+}
+
+function tear_down() {
+  unset session window
+}
+
+function test_balance_windows_horizontal_uses_current_window_by_default() {
+  spy tmuxifier-tmux
+
+  balance_windows_horizontal
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "select-layout -t test-session:0 even-horizontal"
+}
+
+function test_balance_windows_horizontal_with_specific_window() {
+  spy tmuxifier-tmux
+
+  balance_windows_horizontal 2
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "select-layout -t test-session:2 even-horizontal"
+}
+
+function test_balance_windows_horizontal_with_window_name() {
+  spy tmuxifier-tmux
+
+  balance_windows_horizontal "editor"
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "select-layout -t test-session:editor even-horizontal"
+}
+
+function test_balance_windows_horizontal_with_different_session() {
+  session="mysession"
+  window="3"
+  spy tmuxifier-tmux
+
+  balance_windows_horizontal
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "select-layout -t mysession:3 even-horizontal"
+}

tests/lib/layout-helpers/balance_windows_vertical_test.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# balance_windows_vertical() tests
+#
+
+function set_up() {
+  # Default session and window for tests
+  session="test-session"
+  window="0"
+}
+
+function tear_down() {
+  unset session window
+}
+
+function test_balance_windows_vertical_uses_current_window_by_default() {
+  spy tmuxifier-tmux
+
+  balance_windows_vertical
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "select-layout -t test-session:0 even-vertical"
+}
+
+function test_balance_windows_vertical_with_specific_window() {
+  spy tmuxifier-tmux
+
+  balance_windows_vertical 2
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "select-layout -t test-session:2 even-vertical"
+}
+
+function test_balance_windows_vertical_with_window_name() {
+  spy tmuxifier-tmux
+
+  balance_windows_vertical "editor"
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "select-layout -t test-session:editor even-vertical"
+}
+
+function test_balance_windows_vertical_with_different_session() {
+  session="mysession"
+  window="3"
+  spy tmuxifier-tmux
+
+  balance_windows_vertical
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "select-layout -t mysession:3 even-vertical"
+}

tests/lib/layout-helpers/clock_test.sh

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# clock() tests
+#
+
+function set_up() {
+  # Default session and window for tests
+  session="test-session"
+  window="0"
+}
+
+function tear_down() {
+  unset session window
+}
+
+function test_clock_calls_tmux_clock_mode() {
+  spy tmuxifier-tmux
+
+  clock
+
+  assert_have_been_called_with tmuxifier-tmux "clock-mode -t test-session:0."
+}
+
+function test_clock_with_target_pane() {
+  spy tmuxifier-tmux
+
+  clock 1
+
+  assert_have_been_called_with tmuxifier-tmux "clock-mode -t test-session:0.1"
+}
+
+function test_clock_with_different_session_and_window() {
+  session="mysession"
+  window="2"
+  spy tmuxifier-tmux
+
+  clock 3
+
+  assert_have_been_called_with tmuxifier-tmux "clock-mode -t mysession:2.3"
+}
+
+function test_clock_with_named_window() {
+  session="dev"
+  window="editor"
+  spy tmuxifier-tmux
+
+  clock 0
+
+  assert_have_been_called_with tmuxifier-tmux "clock-mode -t dev:editor.0"
+}

tests/lib/layout-helpers/finalize_and_go_to_session_test.sh

@@ -0,0 +1,255 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# finalize_and_go_to_session() tests
+#
+
+function set_up() {
+  # Create temp directory for testing
+  _test_tmp_dir=$(mktemp -d)
+
+  # Save original values
+  _orig_home="$HOME"
+  _orig_tmux="$TMUX"
+  _orig_iterm_attach="$TMUXIFIER_TMUX_ITERM_ATTACH"
+  HOME="$_test_tmp_dir"
+
+  # Reset variables to known state
+  session=""
+  TMUX=""
+  TMUXIFIER_TMUX_ITERM_ATTACH=""
+}
+
+function tear_down() {
+  HOME="$_orig_home"
+  TMUX="$_orig_tmux"
+  TMUXIFIER_TMUX_ITERM_ATTACH="$_orig_iterm_attach"
+  unset session
+  rm -rf "$_test_tmp_dir"
+}
+
+#
+# Kill window 999 behavior
+#
+
+function test_finalize_kills_window_999() {
+  session="mysession"
+  spy tmuxifier-tmux
+  mock tmuxifier-current-session echo "mysession"
+
+  finalize_and_go_to_session
+
+  assert_have_been_called_with tmuxifier-tmux "kill-window -t mysession:999"
+}
+
+function test_finalize_continues_when_kill_window_fails() {
+  session="mysession"
+  # Simulate kill-window failure (window doesn't exist)
+  mock tmuxifier-tmux return 1
+  mock tmuxifier-current-session echo "mysession"
+
+  local result
+  finalize_and_go_to_session
+  result=$?
+
+  # Function should succeed even if kill-window fails due to ! negation
+  assert_same "0" "$result"
+}
+
+function test_finalize_continues_when_kill_window_succeeds() {
+  session="mysession"
+  mock tmuxifier-tmux return 0
+  mock tmuxifier-current-session echo "mysession"
+
+  local result
+  finalize_and_go_to_session
+  result=$?
+
+  # Function succeeds when kill-window succeeds
+  # Note: ! negation means exit code is inverted (1 becomes 0, 0 becomes 1)
+  # but the conditional check for __go_to_session still runs
+  assert_successful_code "true"
+}
+
+#
+# Session switching when current session differs
+#
+
+function test_finalize_calls_attach_when_current_session_differs_and_not_in_tmux() {
+  session="newsession"
+  TMUX=""
+  spy tmuxifier-tmux
+  mock tmuxifier-current-session echo "othersession"
+
+  finalize_and_go_to_session
+
+  # Should call attach-session when not inside tmux
+  assert_have_been_called_with tmuxifier-tmux \
+    "-u attach-session -t newsession:" 2
+}
+
+function test_finalize_calls_switch_when_current_session_differs_and_inside_tmux() {
+  session="newsession"
+  TMUX="/tmp/tmux-1000/default,12345,0"
+  spy tmuxifier-tmux
+  mock tmuxifier-current-session echo "othersession"
+
+  finalize_and_go_to_session
+
+  # Should call switch-client when inside tmux
+  assert_have_been_called_with tmuxifier-tmux \
+    "-u switch-client -t newsession:" 2
+}
+
+#
+# Session switching when current session matches
+#
+
+function test_finalize_does_not_switch_when_current_session_matches() {
+  session="mysession"
+  TMUX=""
+  spy tmuxifier-tmux
+  mock tmuxifier-current-session echo "mysession"
+
+  finalize_and_go_to_session
+
+  # Should only call kill-window, not attach/switch
+  assert_have_been_called_times 1 tmuxifier-tmux
+  assert_have_been_called_with tmuxifier-tmux "kill-window -t mysession:999" 1
+}
+
+function test_finalize_does_not_switch_when_already_in_session_inside_tmux() {
+  session="current"
+  TMUX="/tmp/tmux-1000/default,12345,0"
+  spy tmuxifier-tmux
+  mock tmuxifier-current-session echo "current"
+
+  finalize_and_go_to_session
+
+  # Should only call kill-window
+  assert_have_been_called_times 1 tmuxifier-tmux
+}
+
+#
+# iTerm2 integration
+#
+
+function test_finalize_uses_iterm_attach_flag_when_set() {
+  session="newsession"
+  TMUX=""
+  TMUXIFIER_TMUX_ITERM_ATTACH="-CC"
+  spy tmuxifier-tmux
+  mock tmuxifier-current-session echo "othersession"
+
+  finalize_and_go_to_session
+
+  # Should include -CC flag for iTerm2 integration
+  assert_have_been_called_with tmuxifier-tmux \
+    "-CC -u attach-session -t newsession:" 2
+}
+
+function test_finalize_iterm_flag_not_used_when_switching_client() {
+  session="newsession"
+  TMUX="/tmp/tmux-1000/default,12345,0"
+  TMUXIFIER_TMUX_ITERM_ATTACH="-CC"
+  spy tmuxifier-tmux
+  mock tmuxifier-current-session echo "othersession"
+
+  finalize_and_go_to_session
+
+  # switch-client doesn't use ITERM_ATTACH
+  assert_have_been_called_with tmuxifier-tmux \
+    "-u switch-client -t newsession:" 2
+}
+
+#
+# Edge cases
+#
+
+function test_finalize_handles_session_with_special_characters() {
+  session="my-project_v2.0"
+  spy tmuxifier-tmux
+  mock tmuxifier-current-session echo "my-project_v2.0"
+
+  finalize_and_go_to_session
+
+  assert_have_been_called_with tmuxifier-tmux \
+    "kill-window -t my-project_v2.0:999"
+}
+
+function test_finalize_handles_empty_current_session_output() {
+  session="newsession"
+  TMUX=""
+  spy tmuxifier-tmux
+  # Empty output from tmuxifier-current-session (not in any session)
+  mock tmuxifier-current-session echo ""
+
+  finalize_and_go_to_session
+
+  # Empty != "newsession", so should call attach
+  assert_have_been_called_with tmuxifier-tmux \
+    "-u attach-session -t newsession:" 2
+}
+
+function test_finalize_handles_session_name_with_spaces() {
+  session="my session"
+  spy tmuxifier-tmux
+  mock tmuxifier-current-session echo "my session"
+
+  finalize_and_go_to_session
+
+  assert_have_been_called_with tmuxifier-tmux \
+    "kill-window -t my session:999"
+}
+
+#
+# Integration-style tests
+#
+
+function test_finalize_full_flow_when_session_exists_and_matches() {
+  session="existing"
+  TMUX=""
+  spy tmuxifier-tmux
+  mock tmuxifier-current-session echo "existing"
+
+  finalize_and_go_to_session
+
+  # Verify single call to kill-window only
+  assert_have_been_called_times 1 tmuxifier-tmux
+  assert_have_been_called_with tmuxifier-tmux "kill-window -t existing:999" 1
+}
+
+function test_finalize_full_flow_when_session_needs_attach() {
+  session="newproject"
+  TMUX=""
+  spy tmuxifier-tmux
+  mock tmuxifier-current-session echo ""
+
+  finalize_and_go_to_session
+
+  # Verify both calls: kill-window and attach-session
+  assert_have_been_called_times 2 tmuxifier-tmux
+  assert_have_been_called_with tmuxifier-tmux \
+    "kill-window -t newproject:999" 1
+  assert_have_been_called_with tmuxifier-tmux \
+    "-u attach-session -t newproject:" 2
+}
+
+function test_finalize_full_flow_when_switching_from_another_session() {
+  session="target"
+  TMUX="/tmp/tmux-1000/default,12345,0"
+  spy tmuxifier-tmux
+  mock tmuxifier-current-session echo "source"
+
+  finalize_and_go_to_session
+
+  # Verify both calls: kill-window and switch-client
+  assert_have_been_called_times 2 tmuxifier-tmux
+  assert_have_been_called_with tmuxifier-tmux \
+    "kill-window -t target:999" 1
+  assert_have_been_called_with tmuxifier-tmux \
+    "-u switch-client -t target:" 2
+}

tests/lib/layout-helpers/initialize_session_test.sh

@@ -0,0 +1,430 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# initialize_session() tests
+#
+
+function set_up() {
+  # Create temp directory for testing
+  _test_tmp_dir=$(mktemp -d)
+
+  # Save original values
+  _orig_home="$HOME"
+  HOME="$_test_tmp_dir"
+
+  # Reset variables to known state
+  session=""
+  session_root="$HOME"
+  set_default_path=true
+  window=""
+  TMUX=""
+}
+
+function tear_down() {
+  HOME="$_orig_home"
+  unset session session_root set_default_path window
+  rm -rf "$_test_tmp_dir"
+}
+
+#
+# Session name handling
+#
+
+function test_initialize_session_uses_session_variable_when_no_argument() {
+  session="my-session"
+  mock tmuxifier-tmux echo ""
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  initialize_session
+
+  assert_same "my-session" "$session"
+}
+
+function test_initialize_session_uses_argument_as_session_name() {
+  session=""
+  mock tmuxifier-tmux echo ""
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  initialize_session "custom-session"
+
+  assert_same "custom-session" "$session"
+}
+
+function test_initialize_session_overrides_session_variable_with_argument() {
+  session="original"
+  mock tmuxifier-tmux echo ""
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  initialize_session "override"
+
+  assert_same "override" "$session"
+}
+
+#
+# Server startup
+#
+
+function test_initialize_session_starts_tmux_server() {
+  session="test"
+  spy tmuxifier-tmux
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  initialize_session
+
+  assert_have_been_called_with tmuxifier-tmux "start-server" 1
+}
+
+#
+# Session existence check
+#
+
+function test_initialize_session_returns_1_when_session_exists() {
+  session="existing"
+  # Mock list-sessions to return a matching session (output is also used by
+  # start-server but ignored there)
+  mock tmuxifier-tmux printf '%s\n' "existing: 1 windows"
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  local result
+  initialize_session
+  result=$?
+
+  assert_same "1" "$result"
+}
+
+function test_initialize_session_returns_0_when_session_does_not_exist() {
+  session="newsession"
+  mock tmuxifier-tmux echo ""
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  local result
+  initialize_session
+  result=$?
+
+  assert_same "0" "$result"
+}
+
+function test_initialize_session_checks_exact_session_name_match() {
+  session="test"
+  # Return a session with similar but different name - grep pattern "^test:"
+  # won't match "test-other:"
+  mock tmuxifier-tmux printf '%s\n' "test-other: 1 windows"
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  local result
+  initialize_session
+  result=$?
+
+  # Should succeed because "test:" pattern doesn't match "test-other:"
+  assert_same "0" "$result"
+}
+
+#
+# Tmux 1.9+ behavior (modern tmux)
+#
+
+function test_initialize_session_creates_session_with_c_flag_for_tmux_19_plus() {
+  session="newsession"
+  session_root="$_test_tmp_dir"
+  set_default_path=true
+  spy tmuxifier-tmux
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  initialize_session
+
+  # Calls: start-server(1), list-sessions(2), new-session(3), setenv(4),
+  # move-window(5)
+  assert_have_been_called_with tmuxifier-tmux \
+    "new-session -d -s newsession -c $_test_tmp_dir" 3
+}
+
+function test_initialize_session_omits_c_flag_when_set_default_path_false() {
+  session="newsession"
+  session_root="$_test_tmp_dir"
+  set_default_path=false
+  spy tmuxifier-tmux
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  initialize_session
+
+  # Calls: start-server(1), list-sessions(2), new-session(3), move-window(4)
+  assert_have_been_called_with tmuxifier-tmux \
+    "new-session -d -s newsession" 3
+}
+
+#
+# Tmux 1.8 and earlier behavior (legacy tmux)
+#
+
+function test_initialize_session_creates_session_without_c_for_tmux_18() {
+  session="newsession"
+  session_root="$_test_tmp_dir"
+  spy tmuxifier-tmux
+  mock tmuxifier-tmux-version <<< "<"
+  mock __get_first_window_index echo "0"
+
+  initialize_session
+
+  # Calls: start-server(1), list-sessions(2), new-session(3), ...
+  assert_have_been_called_with tmuxifier-tmux \
+    "new-session -d -s newsession" 3
+}
+
+function test_initialize_session_sets_default_path_option_for_tmux_18() {
+  session="newsession"
+  session_root="$_test_tmp_dir"
+  set_default_path=true
+  spy tmuxifier-tmux
+  mock tmuxifier-tmux-version <<< "<"
+  mock __get_first_window_index echo "0"
+
+  initialize_session
+
+  # Calls: start-server(1), list-sessions(2), new-session(3), set-option(4),
+  # setenv(5), move-window(6)
+  assert_have_been_called_with tmuxifier-tmux \
+    "set-option -t newsession: default-path $_test_tmp_dir" 4
+}
+
+function test_initialize_session_skips_default_path_when_set_default_path_false() {
+  session="newsession"
+  session_root="$_test_tmp_dir"
+  set_default_path=false
+  spy tmuxifier-tmux
+  mock tmuxifier-tmux-version <<< "<"
+  mock __get_first_window_index echo "0"
+
+  initialize_session
+
+  # Should have 4 calls: start-server, list-sessions, new-session, move-window
+  # (no set-option default-path call, no setenv call)
+  assert_have_been_called_times 4 tmuxifier-tmux
+  assert_have_been_called_with tmuxifier-tmux "start-server" 1
+  assert_have_been_called_with tmuxifier-tmux "list-sessions" 2
+  assert_have_been_called_with tmuxifier-tmux "new-session -d -s newsession" 3
+  assert_have_been_called_with tmuxifier-tmux \
+    "move-window -s newsession:0 -t newsession:999" 4
+}
+
+#
+# Session root environment variable
+#
+
+function test_initialize_session_sets_session_root_env_when_not_home() {
+  session="newsession"
+  # Use a subdirectory so session_root != HOME
+  mkdir -p "$_test_tmp_dir/project"
+  session_root="$_test_tmp_dir/project"
+  set_default_path=true
+  spy tmuxifier-tmux
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  initialize_session
+
+  # Calls: start-server(1), list-sessions(2), new-session(3), setenv(4),
+  # move-window(5)
+  assert_have_been_called_with tmuxifier-tmux \
+    "setenv -t newsession: TMUXIFIER_SESSION_ROOT $_test_tmp_dir/project" 4
+}
+
+function test_initialize_session_skips_session_root_env_when_equal_to_home() {
+  session="newsession"
+  session_root="$HOME"
+  set_default_path=true
+  spy tmuxifier-tmux
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  initialize_session
+
+  # Should have 4 calls (no setenv call when session_root == HOME)
+  assert_have_been_called_times 4 tmuxifier-tmux
+  assert_have_been_called_with tmuxifier-tmux "start-server" 1
+  assert_have_been_called_with tmuxifier-tmux "list-sessions" 2
+  assert_have_been_called_with tmuxifier-tmux \
+    "new-session -d -s newsession -c $HOME" 3
+  assert_have_been_called_with tmuxifier-tmux \
+    "move-window -s newsession:0 -t newsession:999" 4
+}
+
+function test_initialize_session_skips_session_root_env_when_set_default_path_false() {
+  session="newsession"
+  session_root="$_test_tmp_dir"
+  set_default_path=false
+  spy tmuxifier-tmux
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  initialize_session
+
+  # Should have 4 calls (no setenv call when set_default_path is false)
+  assert_have_been_called_times 4 tmuxifier-tmux
+  assert_have_been_called_with tmuxifier-tmux "start-server" 1
+  assert_have_been_called_with tmuxifier-tmux "list-sessions" 2
+  assert_have_been_called_with tmuxifier-tmux "new-session -d -s newsession" 3
+  assert_have_been_called_with tmuxifier-tmux \
+    "move-window -s newsession:0 -t newsession:999" 4
+}
+
+#
+# Default window handling
+#
+
+function test_initialize_session_moves_default_window_to_position_999() {
+  session="newsession"
+  session_root="$HOME"
+  set_default_path=true
+  spy tmuxifier-tmux
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  initialize_session
+
+  assert_have_been_called_with tmuxifier-tmux \
+    "move-window -s newsession:0 -t newsession:999"
+}
+
+function test_initialize_session_uses_first_window_index_for_move() {
+  session="newsession"
+  session_root="$HOME"
+  set_default_path=true
+  spy tmuxifier-tmux
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "1"
+
+  initialize_session
+
+  # Should use the actual first window index (1 in this case)
+  assert_have_been_called_with tmuxifier-tmux \
+    "move-window -s newsession:1 -t newsession:999"
+}
+
+#
+# Integration-style tests
+#
+
+function test_initialize_session_full_flow_tmux_19_returns_success() {
+  session="myproject"
+  mkdir -p "$_test_tmp_dir/project"
+  session_root="$_test_tmp_dir/project"
+  set_default_path=true
+  spy tmuxifier-tmux
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  local result
+  initialize_session
+  result=$?
+
+  assert_same "0" "$result"
+  assert_same "myproject" "$session"
+}
+
+function test_initialize_session_full_flow_tmux_19_calls_expected_commands() {
+  session="myproject"
+  mkdir -p "$_test_tmp_dir/project"
+  session_root="$_test_tmp_dir/project"
+  set_default_path=true
+  spy tmuxifier-tmux
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  initialize_session
+
+  # Verify all expected calls
+  assert_have_been_called_times 5 tmuxifier-tmux
+  assert_have_been_called_with tmuxifier-tmux "start-server" 1
+  assert_have_been_called_with tmuxifier-tmux "list-sessions" 2
+  assert_have_been_called_with tmuxifier-tmux \
+    "new-session -d -s myproject -c $_test_tmp_dir/project" 3
+  assert_have_been_called_with tmuxifier-tmux \
+    "setenv -t myproject: TMUXIFIER_SESSION_ROOT $_test_tmp_dir/project" 4
+  assert_have_been_called_with tmuxifier-tmux \
+    "move-window -s myproject:0 -t myproject:999" 5
+}
+
+function test_initialize_session_full_flow_tmux_18_returns_success() {
+  session="oldproject"
+  mkdir -p "$_test_tmp_dir/project"
+  session_root="$_test_tmp_dir/project"
+  set_default_path=true
+  spy tmuxifier-tmux
+  mock tmuxifier-tmux-version <<< "<"
+  mock __get_first_window_index echo "0"
+
+  local result
+  initialize_session
+  result=$?
+
+  assert_same "0" "$result"
+  assert_same "oldproject" "$session"
+}
+
+function test_initialize_session_full_flow_tmux_18_calls_expected_commands() {
+  session="oldproject"
+  mkdir -p "$_test_tmp_dir/project"
+  session_root="$_test_tmp_dir/project"
+  set_default_path=true
+  spy tmuxifier-tmux
+  mock tmuxifier-tmux-version <<< "<"
+  mock __get_first_window_index echo "0"
+
+  initialize_session
+
+  # Verify all expected calls
+  assert_have_been_called_times 6 tmuxifier-tmux
+  assert_have_been_called_with tmuxifier-tmux "start-server" 1
+  assert_have_been_called_with tmuxifier-tmux "list-sessions" 2
+  assert_have_been_called_with tmuxifier-tmux \
+    "new-session -d -s oldproject" 3
+  assert_have_been_called_with tmuxifier-tmux \
+    "set-option -t oldproject: default-path $_test_tmp_dir/project" 4
+  assert_have_been_called_with tmuxifier-tmux \
+    "setenv -t oldproject: TMUXIFIER_SESSION_ROOT $_test_tmp_dir/project" 5
+  assert_have_been_called_with tmuxifier-tmux \
+    "move-window -s oldproject:0 -t oldproject:999" 6
+}
+
+#
+# Edge cases
+#
+
+function test_initialize_session_does_not_create_when_session_already_exists() {
+  session="existing"
+  mock tmuxifier-tmux printf '%s\n' "existing: 1 windows"
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  local result
+  initialize_session
+  result=$?
+
+  assert_same "1" "$result"
+}
+
+function test_initialize_session_handles_session_with_special_chars() {
+  session="my-project_v2"
+  mock tmuxifier-tmux echo ""
+  mock tmuxifier-tmux-version <<< ">"
+  mock __get_first_window_index echo "0"
+
+  local result
+  initialize_session
+  result=$?
+
+  assert_same "0" "$result"
+  assert_same "my-project_v2" "$session"
+}

tests/lib/layout-helpers/load_session_test.sh

@@ -0,0 +1,200 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# load_session() tests
+#
+
+function set_up() {
+  # Create temp directory structure for testing (per-test for parallel support)
+  _test_tmp_dir=$(mktemp -d)
+  _test_layout_path="${_test_tmp_dir}/layouts"
+  mkdir -p "$_test_layout_path"
+
+  # Create a simple session layout file in layout path
+  cat > "${_test_layout_path}/mysession.session.sh" << 'EOF'
+_test_layout_sourced="mysession"
+EOF
+
+  # Create layout file with .sh extension only
+  cat > "${_test_layout_path}/other.sh" << 'EOF'
+_test_layout_sourced="other"
+EOF
+
+  # Create a layout file as a direct path (with slash)
+  cat > "${_test_tmp_dir}/direct.session.sh" << 'EOF'
+_test_layout_sourced="direct"
+EOF
+
+  # Save original values and set test values
+  _orig_layout_path="$TMUXIFIER_LAYOUT_PATH"
+  _orig_home="$HOME"
+  TMUXIFIER_LAYOUT_PATH="$_test_layout_path"
+
+  # Reset variables
+  session=""
+  session_root=""
+  set_default_path=""
+  _test_layout_sourced=""
+}
+
+function tear_down() {
+  TMUXIFIER_LAYOUT_PATH="$_orig_layout_path"
+  HOME="$_orig_home"
+  unset session session_root set_default_path _test_layout_sourced
+  rm -rf "$_test_tmp_dir"
+}
+
+function test_load_session_finds_layout_by_name_in_layout_path() {
+  load_session "mysession"
+
+  assert_same "mysession" "$_test_layout_sourced"
+}
+
+function test_load_session_finds_layout_by_direct_file_path() {
+  load_session "${_test_tmp_dir}/direct.session.sh"
+
+  assert_same "direct" "$_test_layout_sourced"
+}
+
+function test_load_session_sets_session_from_name_stripping_session_sh() {
+  # Capture session value during source, before it's reset
+  cat > "${_test_layout_path}/capture.session.sh" << 'EOF'
+_captured_session="$session"
+EOF
+
+  load_session "capture"
+
+  assert_same "capture" "$_captured_session"
+}
+
+function test_load_session_sets_session_from_path_stripping_session_sh() {
+  cat > "${_test_tmp_dir}/pathtest.session.sh" << 'EOF'
+_captured_session="$session"
+EOF
+
+  load_session "${_test_tmp_dir}/pathtest.session.sh"
+
+  assert_same "${_test_tmp_dir}/pathtest" "$_captured_session"
+}
+
+function test_load_session_uses_override_name_when_provided() {
+  cat > "${_test_layout_path}/named.session.sh" << 'EOF'
+_captured_session="$session"
+EOF
+
+  load_session "named" "custom-session"
+
+  assert_same "custom-session" "$_captured_session"
+}
+
+function test_load_session_resets_session_variable_after_load() {
+  load_session "mysession"
+
+  assert_empty "$session"
+}
+
+function test_load_session_sets_set_default_path_to_true() {
+  cat > "${_test_layout_path}/checkpath.session.sh" << 'EOF'
+_captured_set_default_path="$set_default_path"
+EOF
+
+  load_session "checkpath"
+
+  assert_same "true" "$_captured_set_default_path"
+}
+
+function test_load_session_resets_session_root_to_home_when_different() {
+  HOME="$_test_tmp_dir"
+  session_root="${_test_tmp_dir}/layouts"
+
+  load_session "mysession"
+
+  assert_same "$_test_tmp_dir" "$session_root"
+}
+
+function test_load_session_does_not_reset_session_root_when_equal_to_home() {
+  HOME="$_test_tmp_dir"
+  session_root="$_test_tmp_dir"
+
+  # Create a layout that changes session_root
+  cat > "${_test_layout_path}/nochange.session.sh" << 'EOF'
+# This layout doesn't change session_root
+EOF
+
+  load_session "nochange"
+
+  # session_root should still be the same (HOME)
+  assert_same "$_test_tmp_dir" "$session_root"
+}
+
+function test_load_session_returns_1_when_file_not_found() {
+  load_session "nonexistent" 2> /dev/null
+  local exit_code=$?
+
+  assert_same "1" "$exit_code"
+}
+
+function test_load_session_prints_error_to_stderr_when_not_found() {
+  local stderr_output
+  stderr_output=$(load_session "nonexistent" 2>&1 > /dev/null)
+
+  assert_contains "nonexistent" "$stderr_output"
+  assert_contains "not found" "$stderr_output"
+}
+
+function test_load_session_sources_file_content() {
+  cat > "${_test_layout_path}/content.session.sh" << 'EOF'
+_test_var_one="session_value1"
+_test_var_two="session_value2"
+EOF
+
+  load_session "content"
+
+  assert_same "session_value1" "$_test_var_one"
+  assert_same "session_value2" "$_test_var_two"
+}
+
+function test_load_session_prefers_layout_path_when_no_slash_in_name() {
+  # Create a file in layout path
+  cat > "${_test_layout_path}/conflict.session.sh" << 'EOF'
+_test_layout_sourced="from_layout_path"
+EOF
+
+  # When given name without slash, should use layout path
+  load_session "conflict"
+
+  assert_same "from_layout_path" "$_test_layout_sourced"
+}
+
+function test_load_session_uses_direct_path_when_slash_present() {
+  mkdir -p "${_test_layout_path}/sub"
+  cat > "${_test_layout_path}/sub/nested.session.sh" << 'EOF'
+_test_layout_sourced="from_nested"
+EOF
+
+  # When given path with slash, should use it directly
+  load_session "${_test_layout_path}/sub/nested.session.sh"
+
+  assert_same "from_nested" "$_test_layout_sourced"
+}
+
+function test_load_session_handles_relative_path_in_current_dir() {
+  # Save current directory and change to temp dir
+  local orig_pwd="$PWD"
+  cd "$_test_tmp_dir"
+
+  # Create a file without .session.sh suffix in current dir
+  cat > "localfile.sh" << 'EOF'
+_test_layout_sourced="from_local"
+EOF
+
+  # When file exists locally and no slash, it should prepend ./
+  load_session "localfile.sh"
+
+  assert_same "from_local" "$_test_layout_sourced"
+
+  cd "$orig_pwd"
+}

tests/lib/layout-helpers/load_window_test.sh

@@ -0,0 +1,175 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# load_window() tests
+#
+
+function set_up() {
+  # Create temp directory structure for testing (per-test for parallel support)
+  _test_tmp_dir=$(mktemp -d)
+  _test_layout_path="${_test_tmp_dir}/layouts"
+  mkdir -p "$_test_layout_path"
+
+  # Create a simple window layout file in layout path
+  cat > "${_test_layout_path}/mywindow.window.sh" << 'EOF'
+_test_layout_sourced="mywindow"
+EOF
+
+  # Create layout file with .sh extension only
+  cat > "${_test_layout_path}/other.sh" << 'EOF'
+_test_layout_sourced="other"
+EOF
+
+  # Create a layout file as a direct path
+  cat > "${_test_tmp_dir}/direct.window.sh" << 'EOF'
+_test_layout_sourced="direct"
+EOF
+
+  # Create a layout that modifies window_root
+  cat > "${_test_layout_path}/chroot.window.sh" << 'EOF'
+_test_layout_sourced="chroot"
+EOF
+
+  # Save original TMUXIFIER_LAYOUT_PATH and set test value
+  _orig_layout_path="$TMUXIFIER_LAYOUT_PATH"
+  TMUXIFIER_LAYOUT_PATH="$_test_layout_path"
+
+  # Reset variables
+  window=""
+  window_root=""
+  session_root=""
+  _test_layout_sourced=""
+}
+
+function tear_down() {
+  TMUXIFIER_LAYOUT_PATH="$_orig_layout_path"
+  unset window window_root session_root _test_layout_sourced
+  rm -rf "$_test_tmp_dir"
+}
+
+function test_load_window_finds_layout_by_name_in_layout_path() {
+  load_window "mywindow"
+
+  assert_same "mywindow" "$_test_layout_sourced"
+}
+
+function test_load_window_finds_layout_by_direct_file_path() {
+  load_window "${_test_tmp_dir}/direct.window.sh"
+
+  assert_same "direct" "$_test_layout_sourced"
+}
+
+function test_load_window_sets_window_from_name_stripping_window_sh() {
+  # We need to capture window value during source, before it's reset
+  cat > "${_test_layout_path}/capture.window.sh" << 'EOF'
+_captured_window="$window"
+EOF
+
+  load_window "capture"
+
+  assert_same "capture" "$_captured_window"
+}
+
+function test_load_window_sets_window_from_name_stripping_sh_only() {
+  cat > "${_test_layout_path}/simple.sh" << 'EOF'
+_captured_window="$window"
+EOF
+
+  # Load by direct path to test .sh stripping
+  load_window "${_test_layout_path}/simple.sh"
+
+  assert_same "${_test_layout_path}/simple" "$_captured_window"
+}
+
+function test_load_window_uses_override_name_when_provided() {
+  cat > "${_test_layout_path}/named.window.sh" << 'EOF'
+_captured_window="$window"
+EOF
+
+  load_window "named" "custom-name"
+
+  assert_same "custom-name" "$_captured_window"
+}
+
+function test_load_window_resets_window_variable_after_load() {
+  load_window "mywindow"
+
+  assert_empty "$window"
+}
+
+function test_load_window_resets_window_root_when_different_from_session_root() {
+  session_root="$_test_tmp_dir"
+  window_root="${_test_tmp_dir}/layouts"
+
+  # Mock the window_root function to track if it's called
+  _window_root_called=""
+  _window_root_arg=""
+  function window_root() {
+    _window_root_called="yes"
+    _window_root_arg="$1"
+  }
+
+  load_window "mywindow"
+
+  assert_same "yes" "$_window_root_called"
+  assert_same "$_test_tmp_dir" "$_window_root_arg"
+}
+
+function test_load_window_does_not_reset_window_root_when_equal_to_session_root() {
+  session_root="$_test_tmp_dir"
+  window_root="$_test_tmp_dir"
+
+  _window_root_called=""
+  function window_root() {
+    _window_root_called="yes"
+  }
+
+  load_window "mywindow"
+
+  assert_empty "$_window_root_called"
+}
+
+function test_load_window_returns_1_when_file_not_found() {
+  load_window "nonexistent" 2> /dev/null
+  local exit_code=$?
+
+  assert_same "1" "$exit_code"
+}
+
+function test_load_window_prints_error_to_stderr_when_not_found() {
+  local stderr_output
+  stderr_output=$(load_window "nonexistent" 2>&1 > /dev/null)
+
+  assert_contains "nonexistent" "$stderr_output"
+  assert_contains "not found" "$stderr_output"
+}
+
+function test_load_window_sources_file_content() {
+  cat > "${_test_layout_path}/content.window.sh" << 'EOF'
+_test_var_one="value1"
+_test_var_two="value2"
+EOF
+
+  load_window "content"
+
+  assert_same "value1" "$_test_var_one"
+  assert_same "value2" "$_test_var_two"
+}
+
+function test_load_window_prefers_direct_file_over_layout_path() {
+  # Create a file that would match both direct path and layout path lookup
+  cat > "${_test_layout_path}/conflict.window.sh" << 'EOF'
+_test_layout_sourced="from_layout_path"
+EOF
+  cat > "${_test_tmp_dir}/conflict.window.sh" << 'EOF'
+_test_layout_sourced="from_direct_path"
+EOF
+
+  # When given as direct path, should use direct file
+  load_window "${_test_tmp_dir}/conflict.window.sh"
+
+  assert_same "from_direct_path" "$_test_layout_sourced"
+}

tests/lib/layout-helpers/new_window_test.sh

@@ -0,0 +1,99 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# new_window() tests
+#
+
+function set_up() {
+  session="test-session"
+  window=""
+}
+
+function tear_down() {
+  unset session window
+}
+
+function test_new_window_calls_tmux_new_window() {
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+  mock __get_current_window_index echo "1"
+
+  new_window
+
+  assert_have_been_called_with tmuxifier-tmux "new-window -t test-session:"
+}
+
+function test_new_window_calls_go_to_window_or_session_path() {
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+  mock __get_current_window_index echo "1"
+
+  new_window
+
+  assert_have_been_called __go_to_window_or_session_path
+}
+
+function test_new_window_sets_window_variable_to_current_index() {
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+  mock __get_current_window_index echo "5"
+
+  new_window
+
+  assert_same "5" "$window"
+}
+
+function test_new_window_with_name_includes_n_flag() {
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+  mock __get_current_window_index echo "1"
+
+  new_window "mywindow"
+
+  assert_have_been_called_with tmuxifier-tmux "new-window -t test-session: -n mywindow" 1
+}
+
+function test_new_window_with_name_disables_allow_rename() {
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+  mock __get_current_window_index echo "1"
+
+  new_window "mywindow"
+
+  assert_have_been_called_with tmuxifier-tmux "set-option -t mywindow allow-rename off" 2
+}
+
+function test_new_window_with_name_and_command() {
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+  mock __get_current_window_index echo "1"
+
+  new_window "editor" "vim"
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "new-window -t test-session: -n editor vim" 1
+}
+
+function test_new_window_with_only_command_via_empty_name() {
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+  mock __get_current_window_index echo "1"
+
+  new_window "" "htop"
+
+  assert_have_been_called_with tmuxifier-tmux "new-window -t test-session: htop"
+}
+
+function test_new_window_without_name_does_not_disable_rename() {
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+  mock __get_current_window_index echo "1"
+
+  new_window
+
+  # Only one call to tmuxifier-tmux (new-window), no set-option call
+  assert_have_been_called_times 1 tmuxifier-tmux
+}

tests/lib/layout-helpers/run_cmd_test.sh

@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# run_cmd() tests
+#
+
+function set_up() {
+  # Default session and window for tests
+  session="test-session"
+  window="0"
+}
+
+function tear_down() {
+  unset session window
+}
+
+function test_run_cmd_sends_command_then_enter() {
+  spy tmuxifier-tmux
+
+  run_cmd "ls -la"
+
+  assert_have_been_called_times 2 tmuxifier-tmux
+}
+
+function test_run_cmd_first_call_sends_command() {
+  spy tmuxifier-tmux
+
+  run_cmd "ls -la"
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "send-keys -t test-session:0. ls -la" 1
+}
+
+function test_run_cmd_second_call_sends_enter_key() {
+  spy tmuxifier-tmux
+
+  run_cmd "ls -la"
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "send-keys -t test-session:0. C-m" 2
+}
+
+function test_run_cmd_with_target_pane() {
+  spy tmuxifier-tmux
+
+  run_cmd "echo hello" 1
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "send-keys -t test-session:0.1 echo hello" 1
+  assert_have_been_called_with \
+    tmuxifier-tmux "send-keys -t test-session:0.1 C-m" 2
+}
+
+function test_run_cmd_with_different_session_and_window() {
+  session="mysession"
+  window="2"
+  spy tmuxifier-tmux
+
+  run_cmd "npm start" 3
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "send-keys -t mysession:2.3 npm start" 1
+  assert_have_been_called_with \
+    tmuxifier-tmux "send-keys -t mysession:2.3 C-m" 2
+}
+
+function test_run_cmd_with_complex_command() {
+  spy tmuxifier-tmux
+
+  run_cmd "cd /tmp && ls"
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "send-keys -t test-session:0. cd /tmp && ls" 1
+  assert_have_been_called_with \
+    tmuxifier-tmux "send-keys -t test-session:0. C-m" 2
+}

tests/lib/layout-helpers/select_pane_test.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# select_pane() tests
+#
+
+function set_up() {
+  # Default session and window for tests
+  session="test-session"
+  window="0"
+}
+
+function tear_down() {
+  unset session window
+}
+
+function test_select_pane_calls_tmux_select_pane() {
+  spy tmuxifier-tmux
+
+  select_pane 1
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "select-pane -t test-session:0.1"
+}
+
+function test_select_pane_with_pane_zero() {
+  spy tmuxifier-tmux
+
+  select_pane 0
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "select-pane -t test-session:0.0"
+}
+
+function test_select_pane_with_different_session_and_window() {
+  session="mysession"
+  window="2"
+  spy tmuxifier-tmux
+
+  select_pane 3
+
+  assert_have_been_called_with tmuxifier-tmux "select-pane -t mysession:2.3"
+}
+
+function test_select_pane_with_named_window() {
+  session="dev"
+  window="editor"
+  spy tmuxifier-tmux
+
+  select_pane 1
+
+  assert_have_been_called_with tmuxifier-tmux "select-pane -t dev:editor.1"
+}

tests/lib/layout-helpers/select_window_test.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# select_window() tests
+#
+
+function set_up() {
+  # Default session and window for tests
+  session="test-session"
+  window="0"
+}
+
+function tear_down() {
+  unset session window
+}
+
+function test_select_window_calls_tmux_select_window() {
+  spy tmuxifier-tmux
+  mock __get_current_window_index echo "1"
+
+  select_window 1
+
+  assert_have_been_called_with tmuxifier-tmux "select-window -t test-session:1"
+}
+
+function test_select_window_with_window_name() {
+  spy tmuxifier-tmux
+  mock __get_current_window_index echo "editor"
+
+  select_window "editor"
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "select-window -t test-session:editor"
+}
+
+function test_select_window_updates_window_variable() {
+  spy tmuxifier-tmux
+  mock __get_current_window_index echo "5"
+
+  select_window 5
+
+  assert_equals "5" "$window"
+}
+
+function test_select_window_with_different_session() {
+  session="mysession"
+  spy tmuxifier-tmux
+  mock __get_current_window_index echo "2"
+
+  select_window 2
+
+  assert_have_been_called_with tmuxifier-tmux "select-window -t mysession:2"
+}

tests/lib/layout-helpers/send_keys_test.sh

@@ -0,0 +1,76 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# send_keys() tests
+#
+
+function set_up() {
+  # Default session and window for tests
+  session="test-session"
+  window="0"
+}
+
+function tear_down() {
+  unset session window
+}
+
+function test_send_keys_sends_string_to_current_pane() {
+  spy tmuxifier-tmux
+
+  send_keys "hello"
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "send-keys -t test-session:0. hello"
+}
+
+function test_send_keys_with_target_pane() {
+  spy tmuxifier-tmux
+
+  send_keys "hello" 1
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "send-keys -t test-session:0.1 hello"
+}
+
+function test_send_keys_with_special_key() {
+  spy tmuxifier-tmux
+
+  send_keys "C-m"
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "send-keys -t test-session:0. C-m"
+}
+
+function test_send_keys_with_command_string() {
+  spy tmuxifier-tmux
+
+  send_keys "ls -la"
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "send-keys -t test-session:0. ls -la"
+}
+
+function test_send_keys_with_different_session_and_window() {
+  session="mysession"
+  window="2"
+  spy tmuxifier-tmux
+
+  send_keys "echo test" 3
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "send-keys -t mysession:2.3 echo test"
+}
+
+function test_send_keys_with_named_window() {
+  session="dev"
+  window="editor"
+  spy tmuxifier-tmux
+
+  send_keys "vim ." 0
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "send-keys -t dev:editor.0 vim ."
+}

tests/lib/layout-helpers/session_root_test.sh

@@ -0,0 +1,90 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# session_root() tests
+#
+
+function set_up() {
+  # Create temp directories for testing (per-test for parallel support)
+  _test_tmp_dir=$(mktemp -d)
+  _test_valid_dir="${_test_tmp_dir}/valid"
+  mkdir -p "$_test_valid_dir"
+  _test_nonexistent_dir="${_test_tmp_dir}/nonexistent"
+
+  # Reset session_root variable before each test
+  session_root=""
+}
+
+function tear_down() {
+  unset session_root
+  rm -rf "$_test_tmp_dir"
+}
+
+function test_session_root_sets_variable_for_existing_directory() {
+  # Mock __expand_path to return the valid directory
+  mock __expand_path echo "$_test_valid_dir"
+
+  session_root "~/some/path"
+
+  assert_same "$_test_valid_dir" "$session_root"
+}
+
+function test_session_root_does_not_set_variable_for_nonexistent_directory() {
+  # Mock __expand_path to return a nonexistent directory
+  mock __expand_path echo "$_test_nonexistent_dir"
+
+  session_root "~/nonexistent"
+
+  assert_empty "$session_root"
+}
+
+function test_session_root_calls_expand_path_with_arguments() {
+  spy __expand_path
+  # Since spy doesn't return anything, the dir check will fail
+  # but we can still verify __expand_path was called
+
+  session_root "~/Projects"
+
+  assert_have_been_called_with __expand_path "~/Projects"
+}
+
+function test_session_root_passes_multiple_arguments_to_expand_path() {
+  spy __expand_path
+
+  session_root '~/$USER/path'
+
+  assert_have_been_called_with __expand_path '~/$USER/path'
+}
+
+function test_session_root_preserves_existing_value_on_invalid_path() {
+  session_root="$_test_valid_dir"
+  mock __expand_path echo "$_test_nonexistent_dir"
+
+  session_root "~/invalid"
+
+  # Original value should be preserved since new path doesn't exist
+  assert_same "$_test_valid_dir" "$session_root"
+}
+
+function test_session_root_overwrites_existing_value_on_valid_path() {
+  local new_dir="${_test_tmp_dir}/another"
+  mkdir -p "$new_dir"
+  session_root="$_test_valid_dir"
+  mock __expand_path echo "$new_dir"
+
+  session_root "~/another"
+
+  assert_same "$new_dir" "$session_root"
+}
+
+function test_session_root_handles_home_directory() {
+  # Use actual HOME which should exist
+  mock __expand_path echo "$HOME"
+
+  session_root "~"
+
+  assert_same "$HOME" "$session_root"
+}

tests/lib/layout-helpers/split_h_test.sh

@@ -0,0 +1,118 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# split_h() tests
+#
+
+function set_up() {
+  # Default session and window for tests
+  session="test-session"
+  window="0"
+}
+
+function tear_down() {
+  unset session window
+}
+
+function test_split_h_calls_tmux_then_go_to_path() {
+  local calls=()
+  function tmuxifier-tmux() { calls+=("tmuxifier-tmux:$*"); }
+  function __go_to_window_or_session_path() { calls+=("go_to_path"); }
+
+  split_h
+
+  assert_equals "tmuxifier-tmux:split-window -t test-session:0. -h" "${calls[0]}"
+  assert_equals "go_to_path" "${calls[1]}"
+}
+
+#
+# Tmux 3.1+ tests (uses -l with % suffix)
+#
+
+function test_split_h_tmux_31_with_percentage_uses_l_flag() {
+  mock tmuxifier-tmux-version <<< ">"
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_h 30
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "split-window -t test-session:0. -h -l 30%"
+}
+
+function test_split_h_tmux_31_with_percentage_and_target_pane() {
+  session="mysession"
+  window="2"
+  mock tmuxifier-tmux-version <<< ">"
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_h 50 1
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "split-window -t mysession:2.1 -h -l 50%"
+}
+
+function test_split_h_tmux_31_with_only_target_pane_empty_percentage() {
+  session="test"
+  window="1"
+  mock tmuxifier-tmux-version <<< ">"
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_h "" 2
+
+  assert_have_been_called_with tmuxifier-tmux "split-window -t test:1.2 -h"
+}
+
+#
+# Tmux 3.0 and earlier tests (uses -p flag)
+#
+
+function test_split_h_tmux_30_with_percentage_uses_p_flag() {
+  mock tmuxifier-tmux-version <<< "="
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_h 30
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "split-window -t test-session:0. -h -p 30"
+}
+
+function test_split_h_tmux_30_with_percentage_and_target_pane() {
+  session="mysession"
+  window="2"
+  mock tmuxifier-tmux-version <<< "<"
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_h 50 1
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "split-window -t mysession:2.1 -h -p 50"
+}
+
+function test_split_h_tmux_30_with_only_target_pane_empty_percentage() {
+  session="test"
+  window="1"
+  mock tmuxifier-tmux-version <<< "="
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_h "" 2
+
+  assert_have_been_called_with tmuxifier-tmux "split-window -t test:1.2 -h"
+}
+
+function test_split_h_always_calls_go_to_window_or_session_path() {
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_h 50 1
+
+  assert_have_been_called_times 1 __go_to_window_or_session_path
+}

tests/lib/layout-helpers/split_hl_test.sh

@@ -0,0 +1,71 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# split_hl() tests
+#
+
+function set_up() {
+  # Default session and window for tests
+  session="test-session"
+  window="0"
+}
+
+function tear_down() {
+  unset session window
+}
+
+function test_split_hl_calls_tmux_then_go_to_path() {
+  local calls=()
+  function tmuxifier-tmux() { calls+=("tmuxifier-tmux:$*"); }
+  function __go_to_window_or_session_path() { calls+=("go_to_path"); }
+
+  split_hl
+
+  assert_equals "tmuxifier-tmux:split-window -t test-session:0. -h" "${calls[0]}"
+  assert_equals "go_to_path" "${calls[1]}"
+}
+
+function test_split_hl_with_column_count_includes_l_flag() {
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_hl 80
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "split-window -t test-session:0. -h -l 80"
+}
+
+function test_split_hl_with_column_count_and_target_pane() {
+  session="mysession"
+  window="2"
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_hl 40 1
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "split-window -t mysession:2.1 -h -l 40"
+}
+
+function test_split_hl_with_only_target_pane_empty_count() {
+  session="test"
+  window="1"
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_hl "" 2
+
+  assert_have_been_called_with tmuxifier-tmux "split-window -t test:1.2 -h"
+}
+
+function test_split_hl_always_calls_go_to_window_or_session_path() {
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_hl 60 1
+
+  assert_have_been_called_times 1 __go_to_window_or_session_path
+}

tests/lib/layout-helpers/split_v_test.sh

@@ -0,0 +1,118 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# split_v() tests
+#
+
+function set_up() {
+  # Default session and window for tests
+  session="test-session"
+  window="0"
+}
+
+function tear_down() {
+  unset session window
+}
+
+function test_split_v_calls_tmux_then_go_to_path() {
+  local calls=()
+  function tmuxifier-tmux() { calls+=("tmuxifier-tmux:$*"); }
+  function __go_to_window_or_session_path() { calls+=("go_to_path"); }
+
+  split_v
+
+  assert_equals "tmuxifier-tmux:split-window -t test-session:0. -v" "${calls[0]}"
+  assert_equals "go_to_path" "${calls[1]}"
+}
+
+#
+# Tmux 3.1+ tests (uses -l with % suffix)
+#
+
+function test_split_v_tmux_31_with_percentage_uses_l_flag() {
+  mock tmuxifier-tmux-version <<< ">"
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_v 30
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "split-window -t test-session:0. -v -l 30%"
+}
+
+function test_split_v_tmux_31_with_percentage_and_target_pane() {
+  session="mysession"
+  window="2"
+  mock tmuxifier-tmux-version <<< ">"
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_v 50 1
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "split-window -t mysession:2.1 -v -l 50%"
+}
+
+function test_split_v_tmux_31_with_only_target_pane_empty_percentage() {
+  session="test"
+  window="1"
+  mock tmuxifier-tmux-version <<< ">"
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_v "" 2
+
+  assert_have_been_called_with tmuxifier-tmux "split-window -t test:1.2 -v"
+}
+
+#
+# Tmux 3.0 and earlier tests (uses -p flag)
+#
+
+function test_split_v_tmux_30_with_percentage_uses_p_flag() {
+  mock tmuxifier-tmux-version <<< "="
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_v 30
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "split-window -t test-session:0. -v -p 30"
+}
+
+function test_split_v_tmux_30_with_percentage_and_target_pane() {
+  session="mysession"
+  window="2"
+  mock tmuxifier-tmux-version <<< "<"
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_v 50 1
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "split-window -t mysession:2.1 -v -p 50"
+}
+
+function test_split_v_tmux_30_with_only_target_pane_empty_percentage() {
+  session="test"
+  window="1"
+  mock tmuxifier-tmux-version <<< "="
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_v "" 2
+
+  assert_have_been_called_with tmuxifier-tmux "split-window -t test:1.2 -v"
+}
+
+function test_split_v_always_calls_go_to_window_or_session_path() {
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_v 50 1
+
+  assert_have_been_called_times 1 __go_to_window_or_session_path
+}

tests/lib/layout-helpers/split_vl_test.sh

@@ -0,0 +1,71 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# split_vl() tests
+#
+
+function set_up() {
+  # Default session and window for tests
+  session="test-session"
+  window="0"
+}
+
+function tear_down() {
+  unset session window
+}
+
+function test_split_vl_calls_tmux_then_go_to_path() {
+  local calls=()
+  function tmuxifier-tmux() { calls+=("tmuxifier-tmux:$*"); }
+  function __go_to_window_or_session_path() { calls+=("go_to_path"); }
+
+  split_vl
+
+  assert_equals "tmuxifier-tmux:split-window -t test-session:0. -v" "${calls[0]}"
+  assert_equals "go_to_path" "${calls[1]}"
+}
+
+function test_split_vl_with_line_count_includes_l_flag() {
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_vl 20
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "split-window -t test-session:0. -v -l 20"
+}
+
+function test_split_vl_with_line_count_and_target_pane() {
+  session="mysession"
+  window="2"
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_vl 15 1
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "split-window -t mysession:2.1 -v -l 15"
+}
+
+function test_split_vl_with_only_target_pane_empty_count() {
+  session="test"
+  window="1"
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_vl "" 2
+
+  assert_have_been_called_with tmuxifier-tmux "split-window -t test:1.2 -v"
+}
+
+function test_split_vl_always_calls_go_to_window_or_session_path() {
+  spy tmuxifier-tmux
+  spy __go_to_window_or_session_path
+
+  split_vl 10 1
+
+  assert_have_been_called_times 1 __go_to_window_or_session_path
+}

tests/lib/layout-helpers/synchronize_off_test.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# synchronize_off() tests
+#
+
+function set_up() {
+  # Default session and window for tests
+  session="test-session"
+  window="0"
+}
+
+function tear_down() {
+  unset session window
+}
+
+function test_synchronize_off_uses_current_window_by_default() {
+  spy tmuxifier-tmux
+
+  synchronize_off
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "set-window-option -t test-session:0 synchronize-panes off"
+}
+
+function test_synchronize_off_with_specific_window() {
+  spy tmuxifier-tmux
+
+  synchronize_off 2
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "set-window-option -t test-session:2 synchronize-panes off"
+}
+
+function test_synchronize_off_with_window_name() {
+  spy tmuxifier-tmux
+
+  synchronize_off "editor"
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "set-window-option -t test-session:editor synchronize-panes off"
+}
+
+function test_synchronize_off_with_different_session() {
+  session="mysession"
+  window="3"
+  spy tmuxifier-tmux
+
+  synchronize_off
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "set-window-option -t mysession:3 synchronize-panes off"
+}

tests/lib/layout-helpers/synchronize_on_test.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# synchronize_on() tests
+#
+
+function set_up() {
+  # Default session and window for tests
+  session="test-session"
+  window="0"
+}
+
+function tear_down() {
+  unset session window
+}
+
+function test_synchronize_on_uses_current_window_by_default() {
+  spy tmuxifier-tmux
+
+  synchronize_on
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "set-window-option -t test-session:0 synchronize-panes on"
+}
+
+function test_synchronize_on_with_specific_window() {
+  spy tmuxifier-tmux
+
+  synchronize_on 2
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "set-window-option -t test-session:2 synchronize-panes on"
+}
+
+function test_synchronize_on_with_window_name() {
+  spy tmuxifier-tmux
+
+  synchronize_on "editor"
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "set-window-option -t test-session:editor synchronize-panes on"
+}
+
+function test_synchronize_on_with_different_session() {
+  session="mysession"
+  window="3"
+  spy tmuxifier-tmux
+
+  synchronize_on
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "set-window-option -t mysession:3 synchronize-panes on"
+}

tests/lib/layout-helpers/tmux_test.sh

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# tmux() tests
+#
+
+function test_tmux_passes_single_arg_to_tmuxifier_tmux() {
+  spy tmuxifier-tmux
+
+  tmux -V
+
+  assert_have_been_called_with tmuxifier-tmux "-V"
+}
+
+function test_tmux_passes_help_flag_to_tmuxifier_tmux() {
+  spy tmuxifier-tmux
+
+  tmux --help
+
+  assert_have_been_called_with tmuxifier-tmux "--help"
+}
+
+function test_tmux_passes_multiple_args_to_tmuxifier_tmux() {
+  spy tmuxifier-tmux
+
+  tmux new -s dude
+
+  assert_have_been_called_with tmuxifier-tmux "new -s dude"
+}
+
+function test_tmux_passes_complex_args_to_tmuxifier_tmux() {
+  spy tmuxifier-tmux
+
+  tmux new-session -d -s "my-session" -n "main"
+
+  assert_have_been_called_with \
+    tmuxifier-tmux "new-session -d -s my-session -n main"
+}
+
+function test_tmux_called_multiple_times() {
+  spy tmuxifier-tmux
+
+  tmux list-sessions
+  tmux list-windows
+  tmux list-panes
+
+  assert_have_been_called_times 3 tmuxifier-tmux
+  assert_have_been_called_with tmuxifier-tmux "list-sessions" 1
+  assert_have_been_called_with tmuxifier-tmux "list-windows" 2
+  assert_have_been_called_with tmuxifier-tmux "list-panes" 3
+}

tests/lib/layout-helpers/window_root_test.sh

@@ -0,0 +1,90 @@
+#!/usr/bin/env bash
+
+# Load the layout-helpers.sh library under test
+source "${_root_dir}/lib/layout-helpers.sh"
+
+#
+# window_root() tests
+#
+
+function set_up() {
+  # Create temp directories for testing (per-test for parallel support)
+  _test_tmp_dir=$(mktemp -d)
+  _test_valid_dir="${_test_tmp_dir}/valid"
+  mkdir -p "$_test_valid_dir"
+  _test_nonexistent_dir="${_test_tmp_dir}/nonexistent"
+
+  # Reset window_root variable before each test
+  window_root=""
+}
+
+function tear_down() {
+  unset window_root
+  rm -rf "$_test_tmp_dir"
+}
+
+function test_window_root_sets_variable_for_existing_directory() {
+  # Mock __expand_path to return the valid directory
+  mock __expand_path echo "$_test_valid_dir"
+
+  window_root "~/some/path"
+
+  assert_same "$_test_valid_dir" "$window_root"
+}
+
+function test_window_root_does_not_set_variable_for_nonexistent_directory() {
+  # Mock __expand_path to return a nonexistent directory
+  mock __expand_path echo "$_test_nonexistent_dir"
+
+  window_root "~/nonexistent"
+
+  assert_empty "$window_root"
+}
+
+function test_window_root_calls_expand_path_with_arguments() {
+  spy __expand_path
+  # Since spy doesn't return anything, the dir check will fail
+  # but we can still verify __expand_path was called
+
+  window_root "~/Projects"
+
+  assert_have_been_called_with __expand_path "~/Projects"
+}
+
+function test_window_root_passes_multiple_arguments_to_expand_path() {
+  spy __expand_path
+
+  window_root '~/$USER/path'
+
+  assert_have_been_called_with __expand_path '~/$USER/path'
+}
+
+function test_window_root_preserves_existing_value_on_invalid_path() {
+  window_root="$_test_valid_dir"
+  mock __expand_path echo "$_test_nonexistent_dir"
+
+  window_root "~/invalid"
+
+  # Original value should be preserved since new path doesn't exist
+  assert_same "$_test_valid_dir" "$window_root"
+}
+
+function test_window_root_overwrites_existing_value_on_valid_path() {
+  local new_dir="${_test_tmp_dir}/another"
+  mkdir -p "$new_dir"
+  window_root="$_test_valid_dir"
+  mock __expand_path echo "$new_dir"
+
+  window_root "~/another"
+
+  assert_same "$new_dir" "$window_root"
+}
+
+function test_window_root_handles_home_directory() {
+  # Use actual HOME which should exist
+  mock __expand_path echo "$HOME"
+
+  window_root "~"
+
+  assert_same "$HOME" "$window_root"
+}

tests/lib/util/calling-complete_test.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+
+# Load the util.sh library under test
+source "${_root_dir}/lib/util.sh"
+
+#
+# calling-complete() tests
+#
+
+function test_calling-complete_returns_0_with_complete_flag() {
+  calling-complete --complete
+  assert_exit_code "0"
+}
+
+function test_calling-complete_returns_0_with_complete_flag_after_arg() {
+  calling-complete foo --complete
+  assert_exit_code "0"
+}
+
+function test_calling-complete_returns_0_with_complete_flag_before_arg() {
+  calling-complete --complete bar
+  assert_exit_code "0"
+}
+
+function test_calling-complete_returns_0_with_complete_flag_between_args() {
+  calling-complete foo --complete bar
+  assert_exit_code "0"
+}
+
+function test_calling-complete_returns_1_with_no_args() {
+  calling-complete
+  assert_exit_code "1"
+}
+
+function test_calling-complete_returns_1_with_unrelated_arg() {
+  calling-complete foo
+  assert_exit_code "1"
+}
+
+function test_calling-complete_returns_1_with_multiple_unrelated_args() {
+  calling-complete foo bar
+  assert_exit_code "1"
+}
+
+function test_calling-complete_returns_1_when_complete_is_not_freestanding() {
+  calling-complete --complete-me
+  assert_exit_code "1"
+}
+
+function test_calling-complete_returns_1_when_complete_is_suffix() {
+  calling-complete foo--complete
+  assert_exit_code "1"
+}

tests/lib/util/calling-help_test.sh

@@ -0,0 +1,83 @@
+#!/usr/bin/env bash
+
+# Load the util.sh library under test
+source "${_root_dir}/lib/util.sh"
+
+#
+# calling-help() tests
+#
+
+function test_calling-help_returns_0_with_help_flag() {
+  calling-help --help
+  assert_exit_code "0"
+}
+
+function test_calling-help_returns_0_with_help_flag_after_arg() {
+  calling-help foo --help
+  assert_exit_code "0"
+}
+
+function test_calling-help_returns_0_with_help_flag_before_arg() {
+  calling-help --help bar
+  assert_exit_code "0"
+}
+
+function test_calling-help_returns_0_with_help_flag_between_args() {
+  calling-help foo --help bar
+  assert_exit_code "0"
+}
+
+function test_calling-help_returns_0_with_h_flag() {
+  calling-help -h
+  assert_exit_code "0"
+}
+
+function test_calling-help_returns_0_with_h_flag_after_arg() {
+  calling-help foo -h
+  assert_exit_code "0"
+}
+
+function test_calling-help_returns_0_with_h_flag_before_arg() {
+  calling-help -h bar
+  assert_exit_code "0"
+}
+
+function test_calling-help_returns_0_with_h_flag_between_args() {
+  calling-help foo -h bar
+  assert_exit_code "0"
+}
+
+function test_calling-help_returns_1_with_no_args() {
+  calling-help
+  assert_exit_code "1"
+}
+
+function test_calling-help_returns_1_with_unrelated_arg() {
+  calling-help foo
+  assert_exit_code "1"
+}
+
+function test_calling-help_returns_1_with_multiple_unrelated_args() {
+  calling-help foo bar
+  assert_exit_code "1"
+}
+
+function test_calling-help_returns_1_when_help_is_not_freestanding() {
+  calling-help --help-me
+  assert_exit_code "1"
+}
+
+function test_calling-help_returns_1_when_help_is_suffix() {
+  calling-help foo--help
+  assert_exit_code "1"
+}
+
+function test_calling-help_returns_1_when_h_is_not_freestanding() {
+  calling-help -hj
+  assert_exit_code "1"
+}
+
+function test_calling-help_returns_1_when_h_is_embedded_in_word() {
+  calling-help welcome-home
+  assert_exit_code "1"
+}

tests/lib/util/vercomp_test.sh

@@ -0,0 +1,132 @@
+#!/usr/bin/env bash
+
+# Load the util.sh library under test
+source "${_root_dir}/lib/util.sh"
+
+#
+# vercomp() tests
+#
+# Return values:
+#   0 = versions are equal
+#   1 = first version is greater
+#   2 = first version is less
+#
+
+# Equal versions
+function test_vercomp_returns_0_for_identical_versions() {
+  vercomp "1.0.0" "1.0.0"
+  assert_exit_code "0"
+}
+
+function test_vercomp_returns_0_for_identical_two_part_versions() {
+  vercomp "1.2" "1.2"
+  assert_exit_code "0"
+}
+
+function test_vercomp_returns_0_for_identical_single_part_versions() {
+  vercomp "5" "5"
+  assert_exit_code "0"
+}
+
+function test_vercomp_returns_0_when_trailing_zeros_differ() {
+  vercomp "1.0" "1.0.0"
+  assert_exit_code "0"
+}
+
+function test_vercomp_returns_0_when_trailing_zeros_differ_reversed() {
+  vercomp "1.0.0" "1.0"
+  assert_exit_code "0"
+}
+
+function test_vercomp_returns_0_for_equal_versions_with_many_parts() {
+  vercomp "1.2.3.4.5" "1.2.3.4.5"
+  assert_exit_code "0"
+}
+
+# First version greater (returns 1)
+function test_vercomp_returns_1_when_major_is_greater() {
+  vercomp "2.0.0" "1.0.0"
+  assert_exit_code "1"
+}
+
+function test_vercomp_returns_1_when_minor_is_greater() {
+  vercomp "1.2.0" "1.1.0"
+  assert_exit_code "1"
+}
+
+function test_vercomp_returns_1_when_patch_is_greater() {
+  vercomp "1.0.2" "1.0.1"
+  assert_exit_code "1"
+}
+
+function test_vercomp_returns_1_when_first_has_more_parts_and_greater() {
+  vercomp "1.0.1" "1.0"
+  assert_exit_code "1"
+}
+
+function test_vercomp_returns_1_for_double_digit_greater() {
+  vercomp "1.10.0" "1.9.0"
+  assert_exit_code "1"
+}
+
+function test_vercomp_returns_1_for_large_version_numbers() {
+  vercomp "100.200.300" "100.200.299"
+  assert_exit_code "1"
+}
+
+# First version less (returns 2)
+function test_vercomp_returns_2_when_major_is_less() {
+  vercomp "1.0.0" "2.0.0"
+  assert_exit_code "2"
+}
+
+function test_vercomp_returns_2_when_minor_is_less() {
+  vercomp "1.1.0" "1.2.0"
+  assert_exit_code "2"
+}
+
+function test_vercomp_returns_2_when_patch_is_less() {
+  vercomp "1.0.1" "1.0.2"
+  assert_exit_code "2"
+}
+
+function test_vercomp_returns_2_when_second_has_more_parts_and_greater() {
+  vercomp "1.0" "1.0.1"
+  assert_exit_code "2"
+}
+
+function test_vercomp_returns_2_for_double_digit_less() {
+  vercomp "1.9.0" "1.10.0"
+  assert_exit_code "2"
+}
+
+function test_vercomp_returns_2_for_large_version_numbers() {
+  vercomp "100.200.299" "100.200.300"
+  assert_exit_code "2"
+}
+
+# Edge cases
+function test_vercomp_returns_0_for_empty_strings() {
+  vercomp "" ""
+  assert_exit_code "0"
+}
+
+function test_vercomp_returns_0_for_zeros() {
+  vercomp "0" "0"
+  assert_exit_code "0"
+}
+
+function test_vercomp_returns_0_for_zero_and_zero_zero() {
+  vercomp "0" "0.0"
+  assert_exit_code "0"
+}
+
+function test_vercomp_handles_leading_zeros_in_parts() {
+  vercomp "1.01" "1.1"
+  assert_exit_code "0"
+}
+
+function test_vercomp_handles_leading_zeros_comparison() {
+  vercomp "1.02" "1.1"
+  assert_exit_code "1"
+}

tmuxifier.tmux

@@ -0,0 +1 @@
+#!/usr/bin/env bash