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;;; test-mousetrap-mode--lighter.el --- Tests for lighter functionality -*- lexical-binding: t; -*-
;;; Commentary:
;; Unit tests for mouse-trap-mode lighter functionality.
;; Tests the dynamic lighter display and interactive clicking behavior.
;;; Code:
(require 'ert)
(require 'mousetrap-mode)
;;; Normal Cases
(ert-deftest test-mousetrap-mode--lighter-normal-shows-mousetrap-when-enabled ()
"Test lighter shows 🪤 when mode is enabled."
(with-temp-buffer
(emacs-lisp-mode)
(mouse-trap-mode 1)
(let ((lighter (mouse-trap--lighter-string)))
(should (string-match-p "🪤" lighter)))))
(ert-deftest test-mousetrap-mode--lighter-normal-shows-mouse-when-disabled ()
"Test lighter shows 🐭 when mode is disabled."
(with-temp-buffer
(emacs-lisp-mode)
(mouse-trap-mode -1)
(let ((lighter (mouse-trap--lighter-string)))
(should (string-match-p "🐭" lighter)))))
(ert-deftest test-mousetrap-mode--lighter-normal-has-help-echo ()
"Test lighter has help-echo tooltip."
(with-temp-buffer
(emacs-lisp-mode)
(mouse-trap-mode 1)
(let ((lighter (mouse-trap--lighter-string)))
(should (get-text-property 0 'help-echo lighter))
(should (string-match-p "Toggle" (get-text-property 0 'help-echo lighter))))))
(ert-deftest test-mousetrap-mode--lighter-normal-has-mouse-face ()
"Test lighter has mouse-face for hover highlighting."
(with-temp-buffer
(emacs-lisp-mode)
(mouse-trap-mode 1)
(let ((lighter (mouse-trap--lighter-string)))
(should (eq (get-text-property 0 'mouse-face lighter) 'mode-line-highlight)))))
(ert-deftest test-mousetrap-mode--lighter-normal-has-local-map ()
"Test lighter has local-map for click handling."
(with-temp-buffer
(emacs-lisp-mode)
(mouse-trap-mode 1)
(let ((lighter (mouse-trap--lighter-string)))
(should (get-text-property 0 'local-map lighter))
(should (keymapp (get-text-property 0 'local-map lighter))))))
(ert-deftest test-mousetrap-mode--lighter-normal-keymap-has-mouse-1-binding ()
"Test lighter keymap has mouse-1 binding."
(should (keymapp mouse-trap--lighter-keymap))
(let ((binding (lookup-key mouse-trap--lighter-keymap [mode-line mouse-1])))
(should binding)
(should (functionp binding))))
(ert-deftest test-mousetrap-mode--lighter-normal-added-to-mode-line-misc-info ()
"Test lighter is added to mode-line-misc-info when mode enabled."
(with-temp-buffer
(emacs-lisp-mode)
(let ((mode-line-misc-info nil)) ; Start fresh
(mouse-trap-mode 1)
(should (member '(:eval (mouse-trap--lighter-string)) mode-line-misc-info)))))
(ert-deftest test-mousetrap-mode--lighter-normal-persists-when-mode-disabled ()
"Test lighter stays in mode-line-misc-info when mode disabled.
This allows it to show the 🐭 indicator when mode is off."
(with-temp-buffer
(emacs-lisp-mode)
(let ((mode-line-misc-info nil)) ; Start fresh
(mouse-trap-mode 1)
(should (member '(:eval (mouse-trap--lighter-string)) mode-line-misc-info))
(mouse-trap-mode -1)
;; Lighter should still be present (to show 🐭)
(should (member '(:eval (mouse-trap--lighter-string)) mode-line-misc-info)))))
;;; Boundary Cases
(ert-deftest test-mousetrap-mode--lighter-boundary-toggle-changes-display ()
"Test toggling mode changes lighter display between 🪤 and 🐭."
(with-temp-buffer
(emacs-lisp-mode)
(mouse-trap-mode 1)
(let ((lighter-on (mouse-trap--lighter-string)))
(should (string-match-p "🪤" lighter-on)))
(mouse-trap-mode -1)
(let ((lighter-off (mouse-trap--lighter-string)))
(should (string-match-p "🐭" lighter-off)))
(mouse-trap-mode 1)
(let ((lighter-on-again (mouse-trap--lighter-string)))
(should (string-match-p "🪤" lighter-on-again)))))
(ert-deftest test-mousetrap-mode--lighter-boundary-multiple-enables-no-duplicates ()
"Test enabling mode multiple times doesn't create duplicate lighters."
(with-temp-buffer
(emacs-lisp-mode)
(let ((mode-line-misc-info nil)) ; Start fresh
(mouse-trap-mode 1)
(mouse-trap-mode -1)
(mouse-trap-mode 1)
;; Should only have one entry
(let ((count 0))
(dolist (item mode-line-misc-info)
(when (equal item '(:eval (mouse-trap--lighter-string)))
(setq count (1+ count))))
(should (= count 1))))))
(ert-deftest test-mousetrap-mode--lighter-boundary-different-buffers-independent ()
"Test lighter state is independent in different buffers."
(let ((buf1 (generate-new-buffer "test1"))
(buf2 (generate-new-buffer "test2")))
(unwind-protect
(progn
(with-current-buffer buf1
(emacs-lisp-mode)
(mouse-trap-mode 1)
(should (string-match-p "🪤" (mouse-trap--lighter-string))))
(with-current-buffer buf2
(emacs-lisp-mode)
(mouse-trap-mode -1)
(should (string-match-p "🐭" (mouse-trap--lighter-string))))
;; Verify buf1 still shows 🪤
(with-current-buffer buf1
(should (string-match-p "🪤" (mouse-trap--lighter-string)))))
(kill-buffer buf1)
(kill-buffer buf2))))
;;; Edge Cases
(ert-deftest test-mousetrap-mode--lighter-edge-always-evaluates-regardless-of-mode-state ()
"Test that lighter entry always evaluates, even when mode is disabled.
This is critical - the entry structure is (:eval ...) not (mouse-trap-mode (:eval ...))
so it displays regardless of the mode variable's value."
(with-temp-buffer
(emacs-lisp-mode)
(let ((mode-line-misc-info nil))
;; Enable mode - adds lighter
(mouse-trap-mode 1)
(let ((entry (car (member '(:eval (mouse-trap--lighter-string)) mode-line-misc-info))))
(should entry)
;; Entry should be (:eval ...) not (mouse-trap-mode (:eval ...))
(should (eq (car entry) :eval))
;; Verify it's not conditional on mouse-trap-mode being the car
(should-not (eq (car entry) 'mouse-trap-mode)))
;; Disable mode - lighter stays and still evaluates
(mouse-trap-mode -1)
(let ((entry (car (member '(:eval (mouse-trap--lighter-string)) mode-line-misc-info))))
(should entry)
(should (eq (car entry) :eval))))))
(ert-deftest test-mousetrap-mode--lighter-edge-string-always-has-space-prefix ()
"Test lighter string always starts with space for proper modeline spacing."
(with-temp-buffer
(emacs-lisp-mode)
(mouse-trap-mode 1)
(let ((lighter-on (mouse-trap--lighter-string)))
(should (string-prefix-p " " lighter-on)))
(mouse-trap-mode -1)
(let ((lighter-off (mouse-trap--lighter-string)))
(should (string-prefix-p " " lighter-off)))))
(ert-deftest test-mousetrap-mode--lighter-edge-properties-cover-entire-string ()
"Test text properties are applied to entire lighter string."
(with-temp-buffer
(emacs-lisp-mode)
(mouse-trap-mode 1)
(let ((lighter (mouse-trap--lighter-string)))
;; Check properties at each position
(dotimes (i (length lighter))
(should (get-text-property i 'local-map lighter))
(should (get-text-property i 'mouse-face lighter))
(should (get-text-property i 'help-echo lighter))))))
(ert-deftest test-mousetrap-mode--lighter-edge-same-keymap-instance ()
"Test all lighters use the same keymap instance for efficiency."
(with-temp-buffer
(emacs-lisp-mode)
(mouse-trap-mode 1)
(let ((lighter1 (mouse-trap--lighter-string))
(lighter2 (mouse-trap--lighter-string)))
(should (eq (get-text-property 0 'local-map lighter1)
(get-text-property 0 'local-map lighter2)))
(should (eq (get-text-property 0 'local-map lighter1)
mouse-trap--lighter-keymap)))))
(provide 'test-mousetrap-mode--lighter)
;;; test-mousetrap-mode--lighter.el ends here
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