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106 lines
4.2 KiB
EmacsLisp
106 lines
4.2 KiB
EmacsLisp
;;; button-tests.el --- tests for button.el -*- lexical-binding: t -*-
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;; Copyright (C) 2019-2021 Free Software Foundation, Inc.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Code:
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(require 'ert)
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(defvar button-tests--map
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(let ((map (make-sparse-keymap)))
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(define-key map "x" #'ignore)
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map)
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"Keymap for testing command substitution.")
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(ert-deftest button-at ()
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"Test `button-at' behavior."
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(with-temp-buffer
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(should-not (button-at (point)))
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(let ((button (insert-text-button "text button"))
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(marker (button-at (1- (point)))))
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(should (markerp marker))
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(should (= (button-end button) (button-end marker) (point))))
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(let ((button (insert-button "overlay button"))
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(overlay (button-at (1- (point)))))
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(should (overlayp overlay))
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(should (eq button overlay)))
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;; Buttons and widgets are incompatible (bug#34506).
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(widget-create 'link "link widget")
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(should-not (button-at (1- (point))))))
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(ert-deftest button--help-echo-string ()
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"Test `button--help-echo' with strings."
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(with-temp-buffer
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;; Text property buttons.
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(let ((button (insert-text-button
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"text" 'help-echo "text: \\<button-tests--map>\\[ignore]")))
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(should (equal (button--help-echo button) "text: x")))
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;; Overlay buttons.
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(let ((button (insert-button "overlay" 'help-echo
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"overlay: \\<button-tests--map>\\[ignore]")))
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(should (equal (button--help-echo button) "overlay: x")))))
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(ert-deftest button--help-echo-form ()
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"Test `button--help-echo' with forms."
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(with-temp-buffer
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;; Test text property buttons with dynamic scoping.
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(let* ((help (make-symbol "help"))
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(form `(funcall (let ((,help "lexical form"))
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(lambda () ,help))))
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(button (insert-text-button "text" 'help-echo form)))
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(set help "dynamic: \\<button-tests--map>\\[ignore]")
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(should (equal (button--help-echo button) "dynamic: x")))
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;; Test overlay buttons with lexical scoping.
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(setq lexical-binding t)
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(let* ((help (make-symbol "help"))
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(form `(funcall
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(let ((,help "lexical: \\<button-tests--map>\\[ignore]"))
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(lambda () ,help))))
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(button (insert-button "overlay" 'help-echo form)))
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(set help "dynamic form")
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(should (equal (button--help-echo button) "lexical: x")))))
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(ert-deftest button--help-echo-function ()
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"Test `button--help-echo' with functions."
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(with-temp-buffer
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;; Text property buttons.
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(let* ((owin (selected-window))
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(obuf (current-buffer))
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(opos (point))
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(help (lambda (win obj pos)
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(should (eq win owin))
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(should (eq obj obuf))
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(should (= pos opos))
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"text: \\<button-tests--map>\\[ignore]"))
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(button (insert-text-button "text" 'help-echo help)))
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(should (equal (button--help-echo button) "text: x"))
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;; Overlay buttons.
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(setq help (lambda (win obj pos)
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(should (eq win owin))
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(should (overlayp obj))
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(should (eq obj button))
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(should (eq (overlay-buffer obj) obuf))
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(should (= (overlay-start obj) opos))
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(should (= pos opos))
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"overlay: \\<button-tests--map>\\[ignore]"))
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(setq opos (point))
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(setq button (insert-button "overlay" 'help-echo help))
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(should (equal (button--help-echo button) "overlay: x")))))
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;;; button-tests.el ends here
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