1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
|
<html>
<!--
Copyright 2009 The Closure Library Authors. All Rights Reserved.
Use of this source code is governed by the Apache License, Version 2.0.
See the COPYING file for details.
-->
<!--
A regression test for goog.module.ModuleLoader.
Unlike the unit tests for goog.module.ModuleManager, this uses
asynchronous test cases and real XHRs.
Author: nicksantos@google.com (Nick Santos)
-->
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>JsUnit tests for goog.module.ModuleLoader</title>
<script src='../base.js'></script>
<script>
goog.require('goog.array');
goog.require('goog.dom');
goog.require('goog.functions');
goog.require('goog.module.ModuleLoader');
goog.require('goog.module.ModuleManager');
goog.require('goog.module.ModuleManager.CallbackType');
goog.require('goog.object');
goog.require('goog.testing.AsyncTestCase');
goog.require('goog.testing.PropertyReplacer');
goog.require('goog.testing.events.EventObserver');
goog.require('goog.testing.jsunit');
goog.require('goog.testing.recordFunction');
goog.require('goog.userAgent.product');
</script>
</head>
<body>
<b>Note:</b>: If you are running this test off local disk on Chrome, it
will fail unless you start Chrome with
<code>--allow-file-access-from-files</code>.
<script>
var modA1Loaded = false;
var modA2Loaded = false;
var modB1Loaded = false;
var moduleLoader = null;
var moduleManager = null;
var stubs = new goog.testing.PropertyReplacer();
var testCase = goog.testing.AsyncTestCase.createAndInstall(document.title);
testCase.stepTimeout = 5 * 1000; // 5 seconds
var EventType = goog.module.ModuleLoader.EventType;
var observer;
testCase.setUp = function() {
modA1Loaded = false;
modA2Loaded = false;
modB1Loaded = false;
goog.provide = goog.nullFunction;
moduleManager = goog.module.ModuleManager.getInstance();
stubs.replace(moduleManager, 'getBackOff_', goog.functions.constant(0));
moduleLoader = new goog.module.ModuleLoader();
observer = new goog.testing.events.EventObserver();
goog.events.listen(
moduleLoader, goog.object.getValues(EventType), observer);
moduleManager.setLoader(moduleLoader);
moduleManager.setAllModuleInfo({
'modA': [],
'modB': ['modA']
});
moduleManager.setModuleUris({
'modA': ['testdata/modA_1.js', 'testdata/modA_2.js'],
'modB': ['testdata/modB_1.js']
});
assertNotLoaded('modA');
assertNotLoaded('modB');
assertFalse(modA1Loaded);
};
testCase.tearDown = function() {
stubs.reset();
// Ensure that the module manager was created.
assertNotNull(goog.module.ModuleManager.getInstance());
moduleManager = goog.module.ModuleManager.instance_ = null;
// tear down the module loaded flag.
modA1Loaded = false;
// Remove all the fake scripts.
var scripts = goog.array.clone(
document.getElementsByTagName('SCRIPT'));
for (var i = 0; i < scripts.length; i++) {
if (scripts[i].src.indexOf('testdata') != -1) {
goog.dom.removeNode(scripts[i]);
}
}
};
function testLoadModuleA() {
testCase.waitForAsync('wait for module A load');
moduleManager.execOnLoad('modA', function() {
testCase.continueTesting();
assertLoaded('modA');
assertNotLoaded('modB');
assertTrue(modA1Loaded);
assertEquals('EVALUATE_CODE',
0, observer.getEvents(EventType.EVALUATE_CODE).length);
assertEquals('REQUEST_SUCCESS',
1, observer.getEvents(EventType.REQUEST_SUCCESS).length);
assertArrayEquals(
['modA'], observer.getEvents(EventType.REQUEST_SUCCESS)[0].moduleIds);
assertEquals('REQUEST_ERROR',
0, observer.getEvents(EventType.REQUEST_ERROR).length);
});
}
function testLoadModuleB() {
testCase.waitForAsync('wait for module B load');
moduleManager.execOnLoad('modB', function() {
testCase.continueTesting();
assertLoaded('modA');
assertLoaded('modB');
assertTrue(modA1Loaded);
});
}
function testLoadDebugModuleA() {
testCase.waitForAsync('wait for module A load');
moduleLoader.setDebugMode(true);
moduleManager.execOnLoad('modA', function() {
testCase.continueTesting();
assertLoaded('modA');
assertNotLoaded('modB');
assertTrue(modA1Loaded);
});
}
function testLoadDebugModuleB() {
testCase.waitForAsync('wait for module B load');
moduleLoader.setDebugMode(true);
moduleManager.execOnLoad('modB', function() {
testCase.continueTesting();
assertLoaded('modA');
assertLoaded('modB');
assertTrue(modA1Loaded);
});
}
function testLoadDebugModuleAThenB() {
// Swap the script tags of module A, to introduce a race condition.
// See the comments on this in ModuleLoader's debug loader.
moduleManager.setModuleUris({
'modA': ['testdata/modA_2.js', 'testdata/modA_1.js'],
'modB': ['testdata/modB_1.js']
});
testCase.waitForAsync('wait for module B load');
moduleLoader.setDebugMode(true);
moduleManager.execOnLoad('modB', function() {
testCase.continueTesting();
assertLoaded('modA');
assertLoaded('modB');
var scripts = goog.array.clone(
document.getElementsByTagName('SCRIPT'));
var seenLastScriptOfModuleA = false;
for (var i = 0; i < scripts.length; i++) {
var uri = scripts[i].src;
if (uri.indexOf('modA_1.js') >= 0) {
seenLastScriptOfModuleA = true;
} else if (uri.indexOf('modB') >= 0) {
assertTrue(seenLastScriptOfModuleA);
}
}
});
}
function testSourceInjection() {
testCase.waitForAsync('wait for module B load');
moduleLoader.setSourceUrlInjection(true);
moduleManager.execOnLoad('modB', function() {
testCase.continueTesting();
assertTrue(!!throwErrorInModuleB);
var ex = null;
try {
throwErrorInModuleB();
} catch (e) {
ex = e;
}
assertNotNull(ex);
// Chrome is currently the only browser that uses sourceURL
// when serializing stack traces.
if (goog.userAgent.product.CHROME) {
assertContains('modB_1.js', ex.stack.toString());
}
});
}
function testModuleLoaderRecursesTooDeep(opt_numModules) {
// There was a bug in the module loader where it would retry recursively
// whenever there was a synchronous failure in the module load. When you
// asked for modB, it would try to load its dependency modA. When modA
// failed, it would move onto modB, and then start over, repeating until it
// ran out of stack.
var numModules = opt_numModules || 1;
var uris = {};
var deps = {};
var mods = [];
for (var num = 0; num < numModules; num++) {
var modName = 'mod' + num;
mods.unshift(modName);
uris[modName] = [];
deps[modName] = num ? ['mod' + (num - 1)] : [];
for (var i = 0; i < 5; i++) {
uris[modName].push(
'http://www.google.com/crossdomain' + num + 'x' + i + '.js');
}
}
moduleManager.setAllModuleInfo(deps);
moduleManager.setModuleUris(uris);
// Make all XHRs throw an error, so that we test the error-handling
// functionality.
var oldXmlHttp = goog.net.XmlHttp;
stubs.set(goog.net, 'XmlHttp', function() {
return {
open: goog.functions.error('mock error'),
abort: goog.nullFunction
};
});
goog.object.extend(goog.net.XmlHttp, oldXmlHttp);
var errorCount = 0;
var errorIds = [];
var errorHandler = function(ignored, modId) {
errorCount++;
errorIds.push(modId);
};
moduleManager.registerCallback(
goog.module.ModuleManager.CallbackType.ERROR,
errorHandler);
moduleManager.execOnLoad(mods[0], function() {
fail('modB should not load successfully');
});
assertEquals(mods.length, errorCount);
goog.array.sort(mods);
goog.array.sort(errorIds);
assertArrayEquals(mods, errorIds);
assertArrayEquals([], moduleManager.requestedModuleIdsQueue_);
assertArrayEquals([], moduleManager.userInitiatedLoadingModuleIds_);
}
function testModuleLoaderRecursesTooDeep2modules() {
testModuleLoaderRecursesTooDeep(2);
}
function testModuleLoaderRecursesTooDeep3modules() {
testModuleLoaderRecursesTooDeep(3);
}
function testModuleLoaderRecursesTooDeep4modules() {
testModuleLoaderRecursesTooDeep(3);
}
function testErrback() {
// Don't run this test on IE, because the way the test runner catches
// errors on IE plays badly with the simulated errors in the test.
if (goog.userAgent.IE) return;
// Modules will throw an exception if this boolean is set to true.
modA1Loaded = true;
var errorHandler = function() {
testCase.continueTesting();
assertNotLoaded('modA');
};
moduleManager.registerCallback(
goog.module.ModuleManager.CallbackType.ERROR,
errorHandler);
moduleManager.execOnLoad('modA', function() {
fail('modA should not load successfully');
});
testCase.waitForAsync('wait for the error callback');
}
function testPrefetchThenLoadModuleA() {
moduleManager.prefetchModule('modA');
stubs.set(goog.net.BulkLoader.prototype, 'load', function() {
fail('modA should not be reloaded')
});
testCase.waitForAsync('wait for module A load');
moduleManager.execOnLoad('modA', function() {
testCase.continueTesting();
assertLoaded('modA');
assertEquals('REQUEST_SUCCESS',
1, observer.getEvents(EventType.REQUEST_SUCCESS).length);
assertArrayEquals(
['modA'], observer.getEvents(EventType.REQUEST_SUCCESS)[0].moduleIds);
assertEquals('REQUEST_ERROR',
0, observer.getEvents(EventType.REQUEST_ERROR).length);
});
}
function testPrefetchThenLoadModuleB() {
moduleManager.prefetchModule('modB');
stubs.set(goog.net.BulkLoader.prototype, 'load', function() {
fail('modA and modB should not be reloaded')
});
testCase.waitForAsync('wait for module B load');
moduleManager.execOnLoad('modB', function() {
testCase.continueTesting();
assertLoaded('modA');
assertLoaded('modB');
assertEquals('REQUEST_SUCCESS',
2, observer.getEvents(EventType.REQUEST_SUCCESS).length);
assertArrayEquals(
['modA'], observer.getEvents(EventType.REQUEST_SUCCESS)[0].moduleIds);
assertArrayEquals(
['modB'], observer.getEvents(EventType.REQUEST_SUCCESS)[1].moduleIds);
assertEquals('REQUEST_ERROR',
0, observer.getEvents(EventType.REQUEST_ERROR).length);
});
}
function testPrefetchModuleAThenLoadModuleB() {
moduleManager.prefetchModule('modA');
testCase.waitForAsync('wait for module A load');
moduleManager.execOnLoad('modB', function() {
testCase.continueTesting();
assertLoaded('modA');
assertLoaded('modB');
assertEquals('REQUEST_SUCCESS',
2, observer.getEvents(EventType.REQUEST_SUCCESS).length);
assertArrayEquals(
['modA'], observer.getEvents(EventType.REQUEST_SUCCESS)[0].moduleIds);
assertArrayEquals(
['modB'], observer.getEvents(EventType.REQUEST_SUCCESS)[1].moduleIds);
assertEquals('REQUEST_ERROR',
0, observer.getEvents(EventType.REQUEST_ERROR).length);
});
}
function testLoadModuleBThenPrefetchModuleA() {
testCase.waitForAsync('wait for module A load');
moduleManager.execOnLoad('modB', function() {
testCase.continueTesting();
assertLoaded('modA');
assertLoaded('modB');
assertEquals('REQUEST_SUCCESS',
2, observer.getEvents(EventType.REQUEST_SUCCESS).length);
assertArrayEquals(
['modA'], observer.getEvents(EventType.REQUEST_SUCCESS)[0].moduleIds);
assertArrayEquals(
['modB'], observer.getEvents(EventType.REQUEST_SUCCESS)[1].moduleIds);
assertEquals('REQUEST_ERROR',
0, observer.getEvents(EventType.REQUEST_ERROR).length);
assertThrows('Module load already requested: modB',
function() {
moduleManager.prefetchModule('modA')
});
});
}
function testPrefetchModuleWithBatchModeEnabled() {
moduleManager.setBatchModeEnabled(true);
assertThrows('Modules prefetching is not supported in batch mode',
function() {
moduleManager.prefetchModule('modA');
});
}
function testLoadErrorCallbackExecutedWhenPrefetchFails() {
// Make all XHRs throw an error, so that we test the error-handling
// functionality.
var oldXmlHttp = goog.net.XmlHttp;
stubs.set(goog.net, 'XmlHttp', function() {
return {
open: goog.functions.error('mock error'),
abort: goog.nullFunction
};
});
goog.object.extend(goog.net.XmlHttp, oldXmlHttp);
var errorCount = 0;
var errorHandler = function() {
errorCount++;
};
moduleManager.registerCallback(
goog.module.ModuleManager.CallbackType.ERROR,
errorHandler);
moduleLoader.prefetchModule('modA', moduleManager.moduleInfoMap_['modA']);
moduleLoader.loadModules(['modA'], moduleManager.moduleInfoMap_,
function() {
fail('modA should not load successfully')
}, errorHandler);
assertEquals(1, errorCount);
}
function assertLoaded(id) {
assertTrue(moduleManager.getModuleInfo(id).isLoaded());
}
function assertNotLoaded(id) {
assertFalse(moduleManager.getModuleInfo(id).isLoaded());
}
</script>
</body>
</html>
|
