test/automated/descr-text-test.el

   1 ;;; descr-text-test.el --- ERT tests for descr-text.el -*- lexical-binding: t -*-
   2
   3 ;; Copyright (C) 2014 Free Software Foundation, Inc.
   4
   5 ;; Author:     Michal Nazarewicz <mina86@mina86.com>
   6
   7 ;; This file is part of GNU Emacs.
   8
   9 ;; GNU Emacs is free software: you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation, either version 3 of the License, or
  12 ;; (at your option) any later version.
  13
  14 ;; GNU Emacs is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  21
  22 ;;; Commentary:
  23
  24 ;; This package defines regression tests for the descr-text package.
  25
  26 ;;; Code:
  27
  28 (require 'ert)
  29 (require 'descr-text)
  30
  31
  32 (ert-deftest descr-text-test-truncate ()
  33   "Tests describe-char-eldoc--truncate function."
  34   (should (equal ""
  35                  (describe-char-eldoc--truncate " \t \n" 100)))
  36   (should (equal "foo"
  37                  (describe-char-eldoc--truncate "foo" 1)))
  38   (should (equal "foo..."
  39                  (describe-char-eldoc--truncate "foo wilma fred" 0)))
  40   (should (equal "foo..."
  41                  (describe-char-eldoc--truncate
  42                   "foo wilma fred" (length "foo wilma"))))
  43   (should (equal "foo wilma..."
  44                  (describe-char-eldoc--truncate
  45                   "foo wilma fred" (+ 3 (length "foo wilma")))))
  46   (should (equal "foo wilma..."
  47                  (describe-char-eldoc--truncate
  48                   "foo wilma fred" (1- (length "foo wilma fred")))))
  49   (should (equal "foo wilma fred"
  50                  (describe-char-eldoc--truncate
  51                   "foo wilma fred" (length "foo wilma fred"))))
  52   (should (equal "foo wilma fred"
  53                  (describe-char-eldoc--truncate
  54                   "  foo\t wilma \nfred\t " (length "foo wilma fred")))))
  55
  56 (ert-deftest descr-text-test-format-desc ()
  57   "Tests describe-char-eldoc--format function."
  58   (should (equal "U+2026: Horizontal ellipsis (Po: Punctuation, Other)"
  59                  (describe-char-eldoc--format ?…)))
  60   (should (equal "U+2026: Horizontal ellipsis (Punctuation, Other)"
  61                  (describe-char-eldoc--format ?… 51)))
  62   (should (equal "U+2026: Horizontal ellipsis (Po)"
  63                  (describe-char-eldoc--format ?… 40)))
  64   (should (equal "Horizontal ellipsis (Po)"
  65                  (describe-char-eldoc--format ?… 30)))
  66   (should (equal "Horizontal ellipsis"
  67                  (describe-char-eldoc--format ?… 20)))
  68   (should (equal "Horizontal..."
  69                  (describe-char-eldoc--format ?… 10))))
  70
  71 (ert-deftest descr-text-test-desc ()
  72   "Tests describe-char-eldoc function."
  73   (with-temp-buffer
  74     (insert "a…")
  75     (goto-char (point-min))
  76     (should (eq ?a (following-char))) ; make sure we are where we think we are
  77     ;; Function should return nil for an ASCII character.
  78     (should (not (describe-char-eldoc)))
  79
  80     (goto-char (1+ (point)))
  81     (should (eq ?… (following-char)))
  82     (let ((eldoc-echo-area-use-multiline-p t))
  83       ;; Function should return description of an Unicode character.
  84       (should (equal "U+2026: Horizontal ellipsis (Po: Punctuation, Other)"
  85                      (describe-char-eldoc))))
  86
  87     (goto-char (point-max))
  88     ;; At the end of the buffer, function should return nil and not blow up.
  89     (should (not (describe-char-eldoc)))))
  90
  91
  92 (provide 'descr-text-test)
  93
  94 ;;; descr-text-test.el ends here