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;;; redisplay-testsuite.el --- Test suite for redisplay.
;; Copyright (C) 2009-2012 Free Software Foundation, Inc.
;; Author: Chong Yidong <cyd@stupidchicken.com>
;; Keywords: internal
;; Human-Keywords: internal
;; 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 <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Type M-x test-redisplay RET to generate the test buffer.
;;; Code:
(defun test-insert-overlay (text &rest props)
(let ((opoint (point))
overlay)
(insert text)
(setq overlay (make-overlay opoint (point)))
(while props
(overlay-put overlay (car props) (cadr props))
(setq props (cddr props)))))
(defun test-redisplay-1 ()
(insert "Test 1: Displaying adjacent and overlapping overlays:\n\n")
(insert " Expected: gnu emacs\n")
(insert " Results: ")
(test-insert-overlay "n" 'before-string "g" 'after-string "u ")
(test-insert-overlay "ma" 'before-string "e" 'after-string "cs")
(insert "\n\n")
(insert " Expected: gnu emacs\n")
(insert " Results: ")
(test-insert-overlay "u" 'before-string "gn")
(test-insert-overlay "ma" 'before-string " e" 'after-string "cs")
(insert "\n\n")
(insert " Expected: gnu emacs\n")
(insert " Results: ")
(test-insert-overlay "XXX" 'display "u "
'before-string "gn" 'after-string "em")
(test-insert-overlay "a" 'after-string "cs")
(insert "\n\n")
(insert " Expected: gnu emacs\n")
(insert " Results: ")
(test-insert-overlay "u " 'before-string "gn" 'after-string "em")
(test-insert-overlay "XXX" 'display "a" 'after-string "cs")
(insert "\n\n"))
(defun test-redisplay-2 ()
(insert "Test 2: Mouse highlighting. Move your mouse over the letters XXX:\n\n")
(insert " Expected: "
(propertize "xxxXXXxxx" 'face 'highlight)
"...---...\n Test: ")
(test-insert-overlay "XXX" 'before-string "xxx" 'after-string "xxx"
'mouse-face 'highlight )
(test-insert-overlay "---" 'before-string "..." 'after-string "...")
(insert "\n\n Expected: "
(propertize "xxxXXX" 'face 'highlight)
"...---...\n Test: ")
(test-insert-overlay "XXX" 'before-string "xxx" 'mouse-face 'highlight)
(test-insert-overlay "---" 'before-string "..." 'after-string "...")
(insert "\n\n Expected: "
(propertize "XXX" 'face 'highlight)
"...---...\n Test: ")
(test-insert-overlay "..." 'display "XXX" 'mouse-face 'highlight)
(test-insert-overlay "---" 'before-string "..." 'after-string "...")
(insert "\n\n Expected: "
(propertize "XXXxxx" 'face 'highlight)
"...\n Test: ")
(test-insert-overlay "..." 'display "XXX" 'after-string "xxx"
'mouse-face 'highlight)
(test-insert-overlay "error" 'display "...")
(insert "\n\n Expected: "
"---..."
(propertize "xxxXXX" 'face 'highlight)
"\n Test: ")
(test-insert-overlay "xxx" 'display "---" 'after-string "...")
(test-insert-overlay "error" 'before-string "xxx" 'display "XXX"
'mouse-face 'highlight)
(insert "\n\n Expected: "
"...---..."
(propertize "xxxXXXxxx" 'face 'highlight)
"\n Test: ")
(test-insert-overlay "---" 'before-string "..." 'after-string "...")
(test-insert-overlay "XXX" 'before-string "xxx" 'after-string "xxx"
'mouse-face 'highlight)
(insert "\n\n Expected: "
"..."
(propertize "XXX" 'face 'highlight)
"...\n Test: ")
(test-insert-overlay "---"
'display (propertize "XXX" 'mouse-face 'highlight)
'before-string "..."
'after-string "...")
(insert "\n\n Expected: "
(propertize "XXX\n" 'face 'highlight)
"\n Test: ")
(test-insert-overlay "XXX\n" 'mouse-face 'highlight)
(insert "\n\n"))
(defun test-redisplay-3 ()
(insert "Test 3: Overlay with before/after strings and images:\n\n")
(let ((img-data "#define x_width 8
#define x_height 8
static unsigned char x_bits[] = {0xff, 0x81, 0xbd, 0xa5, 0xa5, 0xbd, 0x81, 0xff };"))
;; Control
(insert " Expected: AB"
(propertize "X" 'display `(image :data ,img-data :type xbm))
"CD\n")
;; Overlay with before, after, and image display string.
(insert " Result 1: ")
(let ((opoint (point)))
(insert "AXD\n")
(let ((ov (make-overlay (1+ opoint) (+ 2 opoint))))
(overlay-put ov 'before-string "B")
(overlay-put ov 'after-string "C")
(overlay-put ov 'display
`(image :data ,img-data :type xbm))))
;; Overlay with before and after string, and image text prop.
(insert " Result 2: ")
(let ((opoint (point)))
(insert "AXD\n")
(let ((ov (make-overlay (1+ opoint) (+ 2 opoint))))
(overlay-put ov 'before-string "B")
(overlay-put ov 'after-string "C")
(put-text-property (1+ opoint) (+ 2 opoint) 'display
`(image :data ,img-data :type xbm))))
;; Overlays with adjacent before and after strings, and image text
;; prop.
(insert " Result 3: ")
(let ((opoint (point)))
(insert "AXD\n")
(let ((ov1 (make-overlay opoint (1+ opoint)))
(ov2 (make-overlay (+ 2 opoint) (+ 3 opoint))))
(overlay-put ov1 'after-string "B")
(overlay-put ov2 'before-string "C")
(put-text-property (1+ opoint) (+ 2 opoint) 'display
`(image :data ,img-data :type xbm))))
;; Three overlays.
(insert " Result 4: ")
(let ((opoint (point)))
(insert "AXD\n\n")
(let ((ov1 (make-overlay opoint (1+ opoint)))
(ov2 (make-overlay (+ 2 opoint) (+ 3 opoint)))
(ov3 (make-overlay (1+ opoint) (+ 2 opoint))))
(overlay-put ov1 'after-string "B")
(overlay-put ov2 'before-string "C")
(overlay-put ov3 'display `(image :data ,img-data :type xbm))))))
(defun test-redisplay ()
(interactive)
(let ((buf (get-buffer "*Redisplay Test*")))
(if buf
(kill-buffer buf))
(pop-to-buffer (get-buffer-create "*Redisplay Test*"))
(erase-buffer)
(test-redisplay-1)
(test-redisplay-2)
(test-redisplay-3)
(goto-char (point-min))))
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