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;;; wid-edit-tests.el --- tests for wid-edit.el -*- lexical-binding: t -*-
;; Copyright (C) 2019-2020 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Code:
(require 'ert)
(require 'wid-edit)
(ert-deftest widget-at ()
"Test `widget-at' behavior."
(with-temp-buffer
(should-not (widget-at))
(let ((marco (widget-create 'link "link widget"))
(polo (widget-at (1- (point)))))
(should (widgetp polo))
(should (eq marco polo)))
;; Buttons and widgets are incompatible (bug#34506).
(insert-text-button "text button")
(should-not (widget-at (1- (point))))
(insert-button "overlay button")
(should-not (widget-at (1- (point))))))
;; The following three tests compare the effect of using either %n or \n at the
;; end of a format string, as well as using %n at the end or in the middle of
;; the format string. (Bug#12533)
(ert-deftest widget-test-indentation-after-%n ()
"Fail when %n is used at the end of a format string."
:expected-result :failed
(with-temp-buffer
(let (wid indented)
(widget-insert "Testing indentation.\n")
;; If we use %n at the end of the format string of the widget `other', we
;; screw up indentation of the following widgets.
(setq wid (widget-create
'(repeat :indent 4
(cons
string (choice (other :tag "Other" :format "%t%n" c))))))
(goto-char (widget-get wid :value-pos))
;; Since we indent the `repeat' widget, we skip the space characters
;; inserted.
(skip-chars-forward " ")
(setq indented (current-column)) ; Save the column to which we indented.
(should (eq indented (or (widget-get wid :indent) 0)))
;; Insert an entry. This simulates a click or RET at the INS button.
(widget-apply (widget-at) :action)
(goto-char (widget-get wid :value-pos))
(skip-chars-forward " ")
;; This fails, because the button is not at the right column.
(should (eq (current-column) indented)))))
(ert-deftest widget-test-indentation-after-newline ()
"Pass when the newline is used at the end of a format string."
(with-temp-buffer
(let (wid indented)
(widget-insert "Testing indentation.\n")
(setq wid (widget-create
'(repeat :indent 4
(cons
string
(choice (other :tag "Other" :format "%t\n" c))))))
(goto-char (widget-get wid :value-pos))
(skip-chars-forward " ")
(setq indented (current-column))
(should (eq (current-column) (or (widget-get wid :indent) 0)))
(widget-apply (widget-at) :action)
(goto-char (widget-get wid :value-pos))
(skip-chars-forward " ")
;; Because we used \n in the format string, this pass.
(should (eq (current-column) indented)))))
(ert-deftest widget-test-newline-and-indent-same-widget ()
"It's OK to use the %n escape sequence in the middle of the format string."
(with-temp-buffer
(let (wid indented)
(widget-insert "Testing indentation.\n")
(setq wid (widget-create
'(repeat :indent 4
:format "%{%t%}:%n%v%i\n"
(cons
string
(choice (other :tag "Other" :format "%t\n" c))))))
(goto-char (widget-get wid :value-pos))
(skip-chars-forward " ")
(setq indented (current-column))
(should (eq indented (or (widget-get wid :indent) 0)))
(widget-apply (widget-at) :action)
(goto-char (widget-get wid :value-pos))
(skip-chars-forward " ")
(should (eq (current-column) indented))
;; Also, the children are indented correctly.
(let ((grandchild
;; This gets the `string' widget.
(car (widget-get (car (widget-get wid :children)) :children))))
(goto-char (widget-get grandchild :from))
(should (eq (current-column)
(widget-get grandchild :indent)))))))
;;; wid-edit-tests.el ends here
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