Update dotfile option parsing and complete tests

src/lib/parse-dotfile-options.sh

@@ -1,38 +1,36 @@
+# Parse Dotfile options and set relevant global variables.
 parse-dotfile-options() {
   OPT_ROOT_LINK="$(parse-dotfile-root_link-option)"
   OPT_DEFAULT_ACTION="$(parse-dotfile-default_action-option)"
 }
 
-parse-dotfile-root_link-option() {
-  local dotfile="$DOTFILE"
-  if [ -n "$1" ]; then dotfile="$1"; fi
-
-  # Set default.
-  local root_link=".dotfiles"
+# Extract a specific option from Dotfile.
+#
+# Arguments:
+#   - $1: Name of option to extract.
+#   - $2: (optional) Default value of option if not present in Dotfile.
+#   - $3: (optional) Specific Dotfile to read. Uses $DOTFILE if empty.
+#
+parse-dotfile-option() {
+  local name="$1"
+  local value="$2"
+  local dotfile="$3"
+  if [ -z "$dotfile" ]; then dotfile="$DOTFILE"; fi
 
   while read line; do
-    if [[ "$line" == "root_link "* ]]; then
-      root_link="$(trim "${line/#root_link /}")"
+    if [[ "$line" == "$name "* ]]; then
+      value="$(trim "${line/#$name }")"
       break
     fi
   done < "$dotfile"
 
-  echo "$root_link"
+  echo "$value"
+}
+
+parse-dotfile-root_link-option() {
+  echo "$(parse-dotfile-option "root_link" ".dotfiles" "$1")"
 }
 
 parse-dotfile-default_action-option() {
-  local dotfile="$DOTFILE"
-  if [ -n "$1" ]; then dotfile="$1"; fi
-
-  # Set default value.
-  default_action="link"
-
-  while read line; do
-    if [[ "$line" == "default_action "* ]]; then
-      default_action="$(trim "${line/#default_action /}")"
-      break
-    fi
-  done < "$dotfile"
-
-  echo "$default_action"
+  echo "$(parse-dotfile-option "default_action" "link" "$1")"
 }

test/lib/parse-dotfile-options-test.sh

@@ -1,6 +1,7 @@
 #! /usr/bin/env bash
 source "../test-helper.sh"
 source "../../src/lib/parse-dotfile-options.sh"
+source "../../src/lib/trim.sh"
 
 #
 # parse-dotfile-options()
@@ -16,6 +17,73 @@ assert 'echo "$OPT_DEFAULT_ACTION"' \
   "parse-dotfile-default_action-option stub: "
 
 restore "parse-dotfile-root_link-option"
-restore "parse-dotfile-default_link-option"
+restore "parse-dotfile-default_action-option"
+
 
 assert_end "parse-dotfile-options()"
+
+
+#
+# parse-dotfile-option()
+#
+
+# Create temp files/folders used for locate-dotfile() tests.
+mkdir -p "test-tmp/with" "test-tmp/without"
+echo -e "foo_bar .things\nlink: foo -> .foo" > "test-tmp/with/Dotfile"
+echo -e "link: foo -> .foo" > "test-tmp/without/Dotfile"
+
+# When $DOTFILE contains root_link option.
+DOTFILE="test-tmp/with/Dotfile"
+assert 'parse-dotfile-option foo_bar .none' ".things"
+unset DOTFILE
+
+# When $DOTFILE does not contain root_link option.
+DOTFILE="test-tmp/without/Dotfile"
+assert 'parse-dotfile-option foo_bar .none' ".none"
+unset DOTFILE
+
+# When Dotfile to parse is specified as argument.
+assert 'parse-dotfile-option foo_bar .none test-tmp/with/Dotfile' ".things"
+assert 'parse-dotfile-option foo_bar .none test-tmp/without/Dotfile' ".none"
+
+# When option is wrapped across multiple lines with a backslash.
+echo 'foo_bar \'         > "test-tmp/with/Dotfile"
+echo '  .things'        >> "test-tmp/with/Dotfile"
+echo 'link: foo -> bar' >> "test-tmp/with/Dotfile"
+DOTFILE="test-tmp/with/Dotfile"
+assert 'parse-dotfile-option foo_bar .none' ".things"
+unset DOTFILE
+
+# Remove temp files/folders used for locate-dotfile() tests.
+rm "test-tmp/with/Dotfile" "test-tmp/without/Dotfile"
+rmdir "test-tmp/with" "test-tmp/without" "test-tmp"
+
+assert_end "parse-dotfile-option()"
+
+
+#
+# parse-dotfile-root_link-option()
+#
+
+stub "parse-dotfile-option"
+assert 'parse-dotfile-root_link-option' \
+  'parse-dotfile-option stub: root_link .dotfiles '
+assert 'parse-dotfile-root_link-option "test-tmp/with/Dotfile"' \
+  'parse-dotfile-option stub: root_link .dotfiles test-tmp/with/Dotfile'
+restore "parse-dotfile-option"
+
+assert_end "parse-dotfile-root_link-option()"
+
+
+#
+# parse-dotfile-default_action-option()
+#
+
+stub "parse-dotfile-option"
+assert 'parse-dotfile-default_action-option' \
+  'parse-dotfile-option stub: default_action link '
+assert 'parse-dotfile-default_action-option "test-tmp/with/Dotfile"' \
+  'parse-dotfile-option stub: default_action link test-tmp/with/Dotfile'
+restore "parse-dotfile-option"
+
+assert_end "parse-dotfile-default_action-option()"