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1;;; gyp-tests.el - unit tests for gyp-mode.
2
3;; Copyright (c) 2012 Google Inc. All rights reserved.
4;; Use of this source code is governed by a BSD-style license that can be
5;; found in the LICENSE file.
6
7;; The recommended way to run these tests is to run them from the command-line,
8;; with the run-unit-tests.sh script.
9
10(require 'cl)
11(require 'ert)
12(require 'gyp)
13
14(defconst samples (directory-files "testdata" t ".gyp$")
15  "List of golden samples to check")
16
17(defun fontify (filename)
18  (with-temp-buffer
19    (insert-file-contents-literally filename)
20    (gyp-mode)
21    (font-lock-fontify-buffer)
22    (buffer-string)))
23
24(defun read-golden-sample (filename)
25  (with-temp-buffer
26    (insert-file-contents-literally (concat filename ".fontified"))
27    (read (current-buffer))))
28
29(defun equivalent-face (face)
30  "For the purposes of face comparison, we're not interested in the
31   differences between certain faces. For example, the difference between
32   font-lock-comment-delimiter and font-lock-comment-face."
33  (case face
34    ((font-lock-comment-delimiter-face) font-lock-comment-face)
35    (t face)))
36
37(defun text-face-properties (s)
38  "Extract the text properties from s"
39  (let ((result (list t)))
40    (dotimes (i (length s))
41      (setq result (cons (equivalent-face (get-text-property i 'face s))
42                         result)))
43    (nreverse result)))
44
45(ert-deftest test-golden-samples ()
46  "Check that fontification produces the same results as the golden samples"
47  (dolist (sample samples)
48    (let ((golden (read-golden-sample sample))
49          (fontified (fontify sample)))
50      (should (equal golden fontified))
51      (should (equal (text-face-properties golden)
52                     (text-face-properties fontified))))))
53
54(defun create-golden-sample (filename)
55  "Create a golden sample by fontifying filename and writing out the printable
56   representation of the fontified buffer (with text properties) to the
57   FILENAME.fontified"
58  (with-temp-file (concat filename ".fontified")
59    (print (fontify filename) (current-buffer))))
60
61(defun create-golden-samples ()
62  "Recreate the golden samples"
63  (dolist (sample samples) (create-golden-sample sample)))
64