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|
;;; custom-tests.el --- tests for custom.el -*- lexical-binding: t -*-
;; Copyright (C) 2018-2025 Free Software Foundation, Inc.
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
;;; Code:
(require 'ert)
(require 'ert-x)
(require 'wid-edit)
(require 'cus-edit)
(require 'bytecomp)
(ert-deftest custom-theme--load-path ()
"Test `custom-theme--load-path' behavior."
(ert-with-temp-directory temporary-file-directory
;; Path is empty.
(let ((custom-theme-load-path ()))
(should (null (custom-theme--load-path))))
;; Path comprises non-existent file.
(let* ((name (make-temp-name temporary-file-directory))
(custom-theme-load-path (list name)))
(should (not (file-exists-p name)))
(should (null (custom-theme--load-path))))
;; Path comprises existing file.
(ert-with-temp-file file
(let* ((custom-theme-load-path (list file)))
(should (file-exists-p file))
(should (not (file-directory-p file)))
(should (null (custom-theme--load-path)))))
;; Path comprises existing directory.
(ert-with-temp-directory dir
(let* ((custom-theme-load-path (list dir)))
(should (file-directory-p dir))
(should (equal (custom-theme--load-path) custom-theme-load-path))))
;; Expand `custom-theme-directory' path element.
(let ((custom-theme-load-path '(custom-theme-directory)))
(let ((custom-theme-directory (make-temp-name temporary-file-directory)))
(should (not (file-exists-p custom-theme-directory)))
(should (null (custom-theme--load-path))))
(ert-with-temp-file custom-theme-directory
(should (file-exists-p custom-theme-directory))
(should (not (file-directory-p custom-theme-directory)))
(should (null (custom-theme--load-path))))
(ert-with-temp-directory custom-theme-directory
(should (file-directory-p custom-theme-directory))
(should (equal (custom-theme--load-path)
(list custom-theme-directory)))))
;; Expand t path element.
(let ((custom-theme-load-path '(t)))
(let ((data-directory (make-temp-name temporary-file-directory)))
(should (not (file-exists-p data-directory)))
(should (null (custom-theme--load-path))))
(let ((data-directory temporary-file-directory)
(themedir (expand-file-name "themes" temporary-file-directory)))
(should (not (file-exists-p themedir)))
(should (null (custom-theme--load-path)))
(with-temp-file themedir)
(should (file-exists-p themedir))
(should (not (file-directory-p themedir)))
(should (null (custom-theme--load-path)))
(delete-file themedir)
(make-directory themedir)
(should (file-directory-p themedir))
(should (equal (custom-theme--load-path) (list themedir)))))))
(ert-deftest custom-tests-require-theme ()
"Test `require-theme'."
(require 'warnings)
(ert-with-temp-directory temporary-file-directory
(let* ((default-directory temporary-file-directory)
(custom-theme-load-path (list default-directory))
(load-path ()))
;; Generate some `.el' and `.elc' files.
(with-temp-file "custom-tests--a.el"
(insert "(provide 'custom-tests--a)"))
(make-empty-file "custom-tests--b.el")
(with-temp-file "custom-tests--b.elc"
(byte-compile-insert-header nil (current-buffer))
(insert "(provide 'custom-tests--b)"))
(make-empty-file "custom-tests--c.el")
(with-temp-file "custom-tests--d.elc"
(byte-compile-insert-header nil (current-buffer)))
;; Load them.
(dolist (feature '(a b c d e))
(should-not (featurep (intern (format "custom-tests--%s" feature)))))
(should (eq (require-theme 'custom-tests--a) 'custom-tests--a))
(delete-file "custom-tests--a.el")
(dolist (feature '(custom-tests--a custom-tests--b))
(should (eq (require-theme feature) feature))
(should (featurep feature)))
(dolist (feature '(custom-tests--c custom-tests--d))
(dolist (noerror '(nil t))
(let ((err (should-error (require-theme feature noerror))))
(should (string-search "failed to provide feature" (cadr err))))))
(should-error (require-theme 'custom-tests--e) :type 'file-missing)
(should-not (require-theme 'custom-tests--e t))
(dolist (feature '(custom-tests--c custom-tests--d custom-tests--e))
(should-not (featurep feature))))))
(defcustom custom--test-user-option 'foo
"User option for test."
:group 'emacs
:type 'symbol)
(defvar custom--test-variable 'foo
"Variable for test.")
;; This is demonstrating bug#34027.
(ert-deftest custom--test-theme-variables ()
"Test variables setting with enabling / disabling a custom theme."
;; We load custom-resources/custom--test-theme.el.
(let ((custom-theme-load-path `(,(ert-resource-directory))))
(load-theme 'custom--test 'no-confirm 'no-enable)
;; The variables have still their initial values.
(should (equal custom--test-user-option 'foo))
(should (equal custom--test-variable 'foo))
(custom-set-variables
'(custom--test-user-option 'baz)
'(custom--test-variable 'baz))
;; The initial values have been changed.
(should (equal custom--test-user-option 'baz))
(should (equal custom--test-variable 'baz))
;; Enable and then disable.
(enable-theme 'custom--test)
(disable-theme 'custom--test)
;; The variables should have the changed values, by reverting.
(should (equal custom--test-user-option 'baz))
(should (equal custom--test-variable 'baz))))
;; This tests Bug#5358.
(ert-deftest custom-test-show-comment-preserves-changes ()
"Test that adding a comment doesn't discard modifications in progress."
(customize-option 'custom--test-user-option)
(let* ((field (seq-find (lambda (widget)
(eq custom--test-user-option (widget-value widget)))
widget-field-list))
(parent (widget-get field :parent))
(origvalue (widget-value field)))
;; Move to the end of the text of the widget, and modify it. This
;; modification should be preserved after showing the comment field.
(goto-char (widget-field-text-end field))
(insert "bar")
(custom-comment-show parent)
;; From now on, must use `widget-at' to get the value of the widget.
(should-not (eq origvalue (widget-value (widget-at))))
(should (eq (widget-get parent :custom-state) 'modified))
(should (eq (widget-value (widget-at))
(widget-apply field
:value-to-external
(concat
(widget-apply field :value-to-internal origvalue)
"bar"))))))
(ert-deftest custom-test-enable-theme-keeps-settings ()
"Test that enabling a theme doesn't change its settings."
(let* ((custom-theme-load-path `(,(ert-resource-directory)))
settings)
(load-theme 'custom--test 'no-confirm 'no-enable)
(setq settings (get 'custom--test 'theme-settings))
(enable-theme 'custom--test)
(should (equal settings (get 'custom--test 'theme-settings)))))
(defcustom custom--test-local-option 'initial
"Buffer-local user option for testing."
:group 'emacs
:type '(choice (const initial) (const changed))
:local t)
(defcustom custom--test-permanent-option 'initial
"Permanently local user option for testing."
:group 'emacs
:type '(choice (const initial) (const changed))
:local 'permanent)
(ert-deftest custom-test-local-option ()
"Test :local user options."
;; Initial default values.
(should (eq custom--test-local-option 'initial))
(should (eq custom--test-permanent-option 'initial))
(should (eq (default-value 'custom--test-local-option) 'initial))
(should (eq (default-value 'custom--test-permanent-option) 'initial))
(let ((obuf (current-buffer)))
(with-temp-buffer
;; Changed buffer-local values.
(setq custom--test-local-option 'changed)
(setq custom--test-permanent-option 'changed)
(should (eq custom--test-local-option 'changed))
(should (eq custom--test-permanent-option 'changed))
(should (eq (default-value 'custom--test-local-option) 'initial))
(should (eq (default-value 'custom--test-permanent-option) 'initial))
(with-current-buffer obuf
(should (eq custom--test-local-option 'initial))
(should (eq custom--test-permanent-option 'initial)))
;; Permanent variable remains unchanged.
(kill-all-local-variables)
(should (eq custom--test-local-option 'initial))
(should (eq custom--test-permanent-option 'changed))
(should (eq (default-value 'custom--test-local-option) 'initial))
(should (eq (default-value 'custom--test-permanent-option) 'initial)))))
;; The following three tests demonstrate Bug#21355.
;; In this one, we set an user option for the current session and then
;; we enable a theme that doesn't have a setting for it, ending up with
;; a non-nil saved-value property. Since the `caar' of the theme-value
;; property is user (i.e., the user theme setting is active), we might
;; save the setting to the custom-file, even though it was meant for the
;; current session only. So there should be a nil saved-value property
;; for this test to pass.
(ert-deftest custom-test-no-saved-value-after-enabling-theme ()
"Test that we don't record a saved-value property when we shouldn't."
(let ((custom-theme-load-path `(,(ert-resource-directory))))
(customize-option 'mark-ring-max)
(let* ((field (seq-find (lambda (widget)
(eq mark-ring-max (widget-value widget)))
widget-field-list))
(parent (widget-get field :parent)))
;; Move to the editable widget, modify the value and save it.
(goto-char (widget-field-text-end field))
(insert "0")
(widget-apply parent :custom-set)
;; Just setting for the current session should not store a saved-value
;; property.
(should-not (get 'mark-ring-max 'saved-value))
;; Now enable and disable the test theme.
(load-theme 'custom--test 'no-confirm)
(disable-theme 'custom--test)
;; Since the user customized the option, this is OK.
(should (eq (caar (get 'mark-ring-max 'theme-value)) 'user))
;; The saved-value property should still be nil.
(should-not (get 'mark-ring-max 'saved-value)))))
;; In this second test, we load a theme that has a setting for the user option
;; above. We must check that we don't end up with a non-nil saved-value
;; property and a user setting active in the theme-value property, which
;; means we might inadvertently save the session setting in the custom-file.
(defcustom custom--test-bug-21355-before 'foo
"User option for `custom-test-no-saved-value-after-enabling-theme-2'."
:type 'symbol :group 'emacs)
(ert-deftest custom-test-no-saved-value-after-enabling-theme-2 ()
"Test that we don't record a saved-value property when we shouldn't."
(let ((custom-theme-load-path `(,(ert-resource-directory))))
(customize-option 'custom--test-bug-21355-before)
(let* ((field (seq-find
(lambda (widget)
(eq custom--test-bug-21355-before (widget-value widget)))
widget-field-list))
(parent (widget-get field :parent)))
;; Move to the editable widget, modify the value and save it.
(goto-char (widget-field-text-end field))
(insert "bar")
(widget-apply parent :custom-set)
;; Just setting for the current session should not store a saved-value
;; property.
(should-not (get 'custom--test-bug-21355-before 'saved-value))
;; Now load our test theme, which has a setting for
;; `custom--test-bug-21355-before'.
(load-theme 'custom--test 'no-confirm 'no-enable)
(enable-theme 'custom--test)
;; Since the user customized the option, this is OK.
(should (eq (caar (get 'custom--test-bug-21355-before 'theme-value))
'user))
;; But the saved-value property has to be nil, since the user didn't mark
;; this variable to save for future sessions.
(should-not (get 'custom--test-bug-21355-before 'saved-value)))))
(defvar custom--test-bug-21355-after)
;; In this test, we check that stashing a theme value for a not yet defined
;; option works, but that later on if the user customizes the option for the
;; current session, we might save the theme setting in the custom file.
(ert-deftest custom-test-no-saved-value-after-customizing-option ()
"Test for a nil saved-value after setting an option for the current session."
(let ((custom-theme-load-path `(,(ert-resource-directory))))
;; Check that we correctly stashed the value.
(load-theme 'custom--test 'no-confirm 'no-enable)
(enable-theme 'custom--test)
(should (and (not (boundp 'custom--test-bug-21355-after))
(eq (eval
(car (get 'custom--test-bug-21355-after 'saved-value)))
'after)))
;; Now Emacs finds the defcustom.
(defcustom custom--test-bug-21355-after 'initially "..."
:type 'symbol :group 'emacs)
;; And we used the stashed value correctly.
(should (and (boundp 'custom--test-bug-21355-after)
(eq custom--test-bug-21355-after 'after)))
;; Now customize it.
(customize-option 'custom--test-bug-21355-after)
(let* ((field (seq-find (lambda (widget)
(eq custom--test-bug-21355-after
(widget-value widget)))
widget-field-list))
(parent (widget-get field :parent)))
;; Move to the editable widget, modify the value and save it.
(goto-char (widget-field-text-end field))
(insert "bar")
(widget-apply parent :custom-set)
;; The user customized the variable, so this is OK.
(should (eq (caar (get 'custom--test-bug-21355-after 'theme-value))
'user))
;; But it was only for the current session, so this should not happen.
(should-not (get 'custom--test-bug-21355-after 'saved-value)))))
;;; custom-tests.el ends here
|
