assert_additions.js revision 116680a4aac90f2aa7413d9095a592090648e557 
1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5/**
6 * Asserts that a given argument's value is undefined.
7 * @param {object} a The argument to check.
8 */
9function assertUndefined(a) {
10  if (a !== undefined) {
11    throw new Error('Assertion failed: expected undefined');
12  }
13}
14
15/**
16 * Asserts that a given function call throws an exception.
17 * @param {string} msg Message to print if exception not thrown.
18 * @param {Function} fn The function to call.
19 * @param {string} error The name of the exception we expect {@code fn} to
20 *     throw.
21 */
22function assertException(msg, fn, error) {
23  try {
24    fn();
25  } catch (e) {
26    if (error && e.name != error) {
27      throw new Error('Expected to throw ' + error + ' but threw ' + e.name +
28          ' - ' + msg);
29    }
30    return;
31  }
32
33  throw new Error('Expected to throw exception ' + error + ' - ' + msg);
34}
35
36/**
37 * Asserts that two arrays of strings are equal.
38 * @param {Array.<string>} array1 The expected array.
39 * @param {Array.<string>} array2 The test array.
40 */
41function assertEqualStringArrays(array1, array2) {
42  var same = true;
43  if (array1.length != array2.length) {
44    same = false;
45  }
46  for (var i = 0; i < Math.min(array1.length, array2.length); i++) {
47    if (array1[i].trim() != array2[i].trim()) {
48      same = false;
49    }
50  }
51  if (!same) {
52    throw new Error('Expected ' + JSON.stringify(array1) +
53                    ', got ' + JSON.stringify(array2));
54  }
55}
56
57/**
58 * Asserts that two objects have the same JSON serialization.
59 * @param {Object} obj1 The expected object.
60 * @param {Object} obj2 The actual object.
61 */
62function assertEqualsJSON(obj1, obj2) {
63  if (!eqJSON(obj1, obj2)) {
64    throw new Error('Expected ' + JSON.stringify(obj1) +
65                    ', got ' + JSON.stringify(obj2));
66  }
67}
68
69assertSame = assertEquals;
70assertNotSame = assertNotEquals;
71