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* src/buffer.c (Fgenerate_new_buffer_name): Test IGNORE for being nil before calling string-equal, since the latter will compare "nil and 'nil' as equal. (Bug#27966) * test/src/buffer-tests.el (test-generate-new-buffer-name-bug27966): New test.
53 lines
2 KiB
EmacsLisp
53 lines
2 KiB
EmacsLisp
;;; buffer-tests.el --- tests for buffer.c functions -*- lexical-binding: t -*-
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;; Copyright (C) 2015-2017 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 <http://www.gnu.org/licenses/>.
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;;; Code:
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(require 'ert)
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(ert-deftest overlay-modification-hooks-message-other-buf ()
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"Test for bug#21824.
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After a modification-hook has been run and there is an overlay in
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the *Messages* buffer, the message coalescing [2 times] wrongly
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runs the modification-hook of the overlay in the 1st buffer, but
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with parameters from the *Messages* buffer modification."
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(let ((buf nil)
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(msg-ov nil))
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(with-temp-buffer
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(insert "123")
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(overlay-put (make-overlay 1 3)
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'modification-hooks
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(list (lambda (&rest _)
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(setq buf (current-buffer)))))
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(goto-char 2)
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(insert "x")
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(unwind-protect
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(progn
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(setq msg-ov (make-overlay 1 1 (get-buffer-create "*Messages*")))
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(message "a message")
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(message "a message")
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(should (eq buf (current-buffer))))
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(when msg-ov (delete-overlay msg-ov))))))
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(ert-deftest test-generate-new-buffer-name-bug27966 ()
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(should-not (string-equal "nil"
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(progn (get-buffer-create "nil")
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(generate-new-buffer-name "nil")))))
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;;; buffer-tests.el ends here
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