Reorganize internal functions

test/lib/internals/locate-dotfile-test.sh

@@ -0,0 +1,51 @@
+#! /usr/bin/env bash
+source "../../test-helper.sh"
+source "../../../src/lib/internals.sh"
+
+#
+# locate-dotfile() tests
+#
+
+# Create temp files/folders used for locate-dotfile() tests.
+mkdir -p "test-tmp/with" "test-tmp/without"
+touch "test-tmp/with/Dotfile"
+
+# When $DOTFILE is empty and current path has a Dotfile.
+cd "test-tmp/with"
+DOTFILE=""
+assert_raises 'locate-dotfile' 0
+assert 'locate-dotfile; echo "$DOTFILE"' "$(pwd)/Dotfile"
+unset DOTFILE
+cd-back
+
+# When $DOTFILE is empty and current path does not have a Dotfile.
+cd "test-tmp/without"
+DOTFILE=""
+assert_raises 'locate-dotfile' 1
+assert 'locate-dotfile 2>&1' "ERROR: \"$(pwd)\" does not have a Dotfile."
+assert 'locate-dotfile; echo "$DOTFILE"' ""
+unset DOTFILE
+cd-back
+
+# When $DOTFILE is not empty and points at a existing Dotfile.
+DOTFILE="test-tmp/with/Dotfile"
+assert_raises 'locate-dotfile' 0
+assert 'locate-dotfile; echo "$DOTFILE"' "$DOTFILE"
+unset DOTFILE
+
+# When $DOTFILE is not empty and points at a non-existing Dotfile.
+DOTFILE="test-tmp/without/Dotfile"
+assert_raises 'locate-dotfile' 1
+assert 'locate-dotfile 2>&1' "ERROR: \"$DOTFILE\" does not exist."
+assert 'locate-dotfile; echo "$DOTFILE"' "$DOTFILE"
+unset DOTFILE
+
+# Remove temp files/folders used for locate-dotfile() tests.
+rm "test-tmp/with/Dotfile"
+rmdir "test-tmp/with" "test-tmp/without" "test-tmp"
+
+# Ensure temp files/folder were cleaned up.
+assert_raises "test -d test-tmp" 1
+
+# End of locate-dotfile() tests.
+assert_end 'locate-dotfile()'