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;;; descr-text-test.el --- ERT tests for descr-text.el -*- lexical-binding: t -*-
;; Copyright (C) 2014, 2016-2021 Free Software Foundation, Inc.
;; Author: Michal Nazarewicz <mina86@mina86.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/>.
;;; Commentary:
;; This package defines regression tests for the descr-text package.
;;; Code:
(require 'ert)
(require 'descr-text)
(ert-deftest descr-text-test-truncate ()
"Tests describe-char-eldoc--truncate function."
(should (equal ""
(describe-char-eldoc--truncate " \t \n" 100)))
(should (equal "foo"
(describe-char-eldoc--truncate "foo" 1)))
(should (equal "foo..."
(describe-char-eldoc--truncate "foo wilma fred" 0)))
(should (equal "foo..."
(describe-char-eldoc--truncate
"foo wilma fred" (length "foo wilma"))))
(should (equal "foo wilma..."
(describe-char-eldoc--truncate
"foo wilma fred" (+ 3 (length "foo wilma")))))
(should (equal "foo wilma..."
(describe-char-eldoc--truncate
"foo wilma fred" (1- (length "foo wilma fred")))))
(should (equal "foo wilma fred"
(describe-char-eldoc--truncate
"foo wilma fred" (length "foo wilma fred"))))
(should (equal "foo wilma fred"
(describe-char-eldoc--truncate
" foo\t wilma \nfred\t " (length "foo wilma fred")))))
(ert-deftest descr-text-test-format-desc ()
"Tests describe-char-eldoc--format function."
(should (equal "U+2026: Horizontal ellipsis (Po: Punctuation, Other)"
(describe-char-eldoc--format ?…)))
(should (equal "U+2026: Horizontal ellipsis (Punctuation, Other)"
(describe-char-eldoc--format ?… 51)))
(should (equal "U+2026: Horizontal ellipsis (Po)"
(describe-char-eldoc--format ?… 40)))
(should (equal "Horizontal ellipsis (Po)"
(describe-char-eldoc--format ?… 30)))
(should (equal "Horizontal ellipsis"
(describe-char-eldoc--format ?… 20)))
(should (equal "Horizontal..."
(describe-char-eldoc--format ?… 10))))
(ert-deftest descr-text-test-desc ()
"Tests describe-char-eldoc function."
(with-temp-buffer
(insert "a…")
(goto-char (point-min))
(should (eq ?a (following-char))) ; make sure we are where we think we are
;; Function should return nil for an ASCII character.
(should (not (describe-char-eldoc 'ignore)))
(goto-char (1+ (point)))
(should (eq ?… (following-char)))
(let ((eldoc-echo-area-use-multiline-p t))
;; Function should return description of an Unicode character.
(should (equal "U+2026: Horizontal ellipsis (Po: Punctuation, Other)"
(describe-char-eldoc 'ignore))))
(goto-char (point-max))
;; At the end of the buffer, function should return nil and not blow up.
(should (not (describe-char-eldoc 'ignore)))))
(provide 'descr-text-test)
;;; descr-text-test.el ends here
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