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;;; tabify-tests.el --- tests for tabify.el -*- lexical-binding: t -*-
;; Copyright (C) 2019-2020 Free Software Foundation, Inc.
;; Author: Stefan Kangas <stefankangas@gmail.com>
;; 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 'tabify)
(defun tabify-tests--test-changes (fun changes width)
(with-temp-buffer
(let ((tab-width width))
(insert (mapconcat #'car changes ""))
(funcall fun (point-min) (point-max))
(should (equal (buffer-string) (mapconcat #'cadr changes ""))))))
(ert-deftest tabify-tests-untabify ()
(let ((changes '(("***\n" "***\n")
(" ***\n" " ***\n")
("\t***\n" " ***\n")
("\t ***\n" " ***\n")
("\t\t***\n" " ***\n")
("\t\t ***\n" " ***\n")
("\t\t\t***\n" " ***\n")
("\t\t\t ***\n" " ***\n")
(" ***\n" " ***\n")
(" \t ***\n" " ***\n")
(" \t***\n" " ***\n")
(" \t***\n" " ***\n"))))
(tabify-tests--test-changes #'untabify changes 2)))
(ert-deftest tabify-tests-tabify ()
(let ((changes '(("***\n" "***\n")
(" ***\n" " ***\n")
(" ***\n" "\t***\n")
(" ***\n" "\t ***\n")
(" ***\n" "\t\t***\n")
(" ***\n" "\t\t ***\n")
(" ***\n" "\t\t\t***\n")
(" ***\n" "\t\t\t ***\n")
("\t***\n" "\t***\n")
("\t ***\n" "\t ***\n")
("\t\t***\n" "\t\t***\n"))))
(tabify-tests--test-changes #'tabify changes 2)))
(ert-deftest tabify-tests-tabify/all-spaces-on-line ()
(with-temp-buffer
(let ((tab-width 2))
(insert " ** ** ")
(tabify (point-min) (point-max))
(should (equal (buffer-string) "\t**\t**\t")))))
(ert-deftest tabify-tests-tabify/only-initial ()
(with-temp-buffer
(let ((tab-width 2)
(tabify-regexp "^\\t* [ \\t]+")) ; from tabify-regexp docstring
(insert " ** ")
(tabify (point-min) (point-max))
(should (equal (buffer-string) "\t** ")))))
(provide 'tabify-tests)
;;; tabify-tests.el ends here
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