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;;; hl-line-tests.el --- Test suite for hl-line. -*- lexical-binding: t -*-
;; Copyright (C) 2022-2025 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Code:
(require 'ert)
(require 'hl-line)
(defsubst hl-line-tests-verify (_label on-p)
(if on-p
(cl-some (apply-partially #'eq hl-line-overlay)
(overlays-at (point)))
(not (cl-some (apply-partially #'eq hl-line-overlay)
(overlays-at (point))))))
(ert-deftest hl-line-tests-sticky-across-frames ()
(skip-unless (display-graphic-p))
(customize-set-variable 'global-hl-line-sticky-flag t)
(call-interactively #'global-hl-line-mode)
(let ((first-frame (selected-frame))
(first-buffer "foo")
(second-buffer "bar")
second-frame)
(unwind-protect
(progn
(switch-to-buffer first-buffer)
(save-excursion
(insert (buffer-name)))
(run-hooks 'post-command-hook)
(should (hl-line-tests-verify 111 t))
(select-frame (setq second-frame (make-frame)))
(switch-to-buffer second-buffer)
(save-excursion
(insert (buffer-name)))
(run-hooks 'post-command-hook)
(should (hl-line-tests-verify 762 t))
(with-current-buffer first-buffer
(should (hl-line-tests-verify 534 t)))
(call-interactively #'global-hl-line-mode)
(should (hl-line-tests-verify 125 nil))
(with-current-buffer first-buffer
(should (hl-line-tests-verify 892 nil)))
;; now do unsticky
(customize-set-variable 'hl-line-sticky-flag nil)
(call-interactively #'global-hl-line-mode)
(run-hooks 'post-command-hook)
(should (hl-line-tests-verify 467 t))
(with-current-buffer first-buffer
(should (hl-line-tests-verify 765 nil)))
(select-frame first-frame)
(should (equal (buffer-name) first-buffer))
(run-hooks 'post-command-hook)
(should (hl-line-tests-verify 423 t))
(with-current-buffer second-buffer
(should (hl-line-tests-verify 897 nil))))
(let (kill-buffer-query-functions)
(ignore-errors (kill-buffer first-buffer))
(ignore-errors (kill-buffer second-buffer))
(ignore-errors (delete-frame second-frame))))))
(ert-deftest hl-line-tests-sticky ()
(customize-set-variable 'hl-line-sticky-flag t)
(let ((first-buffer "foo")
(second-buffer "bar"))
(unwind-protect
(progn
(switch-to-buffer first-buffer)
(hl-line-mode 1)
(save-excursion
(insert (buffer-name)))
(run-hooks 'post-command-hook)
(should (hl-line-tests-verify 123 t))
(switch-to-buffer second-buffer)
(hl-line-mode 1)
(save-excursion
(insert (buffer-name)))
(run-hooks 'post-command-hook)
(should (hl-line-tests-verify 56 t))
(with-current-buffer first-buffer
(should (hl-line-tests-verify 67 t)))
;; now do unsticky
(customize-set-variable 'hl-line-sticky-flag nil)
(should (hl-line-tests-verify 234 t))
(with-current-buffer first-buffer
(should (hl-line-tests-verify 231 nil)))
(switch-to-buffer first-buffer)
(run-hooks 'post-command-hook)
(should (hl-line-tests-verify 257 t))
(with-current-buffer second-buffer
(should (hl-line-tests-verify 999 nil))))
(let (kill-buffer-query-functions)
(ignore-errors (kill-buffer first-buffer))
(ignore-errors (kill-buffer second-buffer))))))
(provide 'hl-line-tests)
;;; hl-line-tests.el ends here
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