Reorganize internal functions

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

@@ -0,0 +1,36 @@
+#! /usr/bin/env bash
+source "../../test-helper.sh"
+source "../../../src/lib/internals.sh"
+
+#
+# locate-target() tests
+#
+
+# When $TARGET is empty.
+TARGET=""
+assert_raises 'locate-target' 0
+assert 'locate-target; echo "$TARGET"' "$HOME"
+unset TARGET
+
+# When $TARGET is not empty and is a directory.
+TARGET="$(pwd)"
+assert_raises 'locate-target' 0
+assert 'locate-target; echo "$TARGET"' "$(pwd)"
+unset TARGET
+
+# When $TARGET is not empty and is not a directory.
+TARGET="/tmp/this/does/not/exist"
+assert_raises 'locate-target' 1
+assert 'locate-target 2>&1' "ERROR: Target \"$TARGET\" is not a directory."
+assert 'locate-target; echo "$TARGET"' "$TARGET"
+unset TARGET
+
+# If neither $TARGET or $HOME is set, ~ is expanded to find home folder
+original_home="$HOME"
+unset HOME
+assert_raises 'locate-target' 0
+assert 'locate-target; echo "$TARGET"' "$original_home"
+HOME="$original_home"
+
+# End of locate-target() tests.
+assert_end 'locate-target()'