summaryrefslogtreecommitdiffstats
path: root/mobile/android/tests/browser/robocop/robocop_head.js
blob: 0fa7e56c8a6b5be6ab3c4034c2908c8724c83de2 (plain)
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
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

// The test js is shared between sandboxed (which has no SpecialPowers object)
// and content mochitests (where the |Components| object is accessible only as
// SpecialPowers.Components). Expose Components if necessary here to make things
// work everywhere.
//
// Even if the real |Components| doesn't exist, we might shim in a simple JS
// placebo for compat. An easy way to differentiate this from the real thing
// is whether the property is read-only or not.
{
  let c = Object.getOwnPropertyDescriptor(this, 'Components');
  if ((!c.value || c.writable) && typeof SpecialPowers === 'object')
    Components = SpecialPowers.wrap(SpecialPowers.Components);
}

/*
 * This file contains common code that is loaded before each test file(s).
 * See http://developer.mozilla.org/en/docs/Writing_xpcshell-based_unit_tests
 * for more information.
 */

var _quit = false;
var _tests_pending = 0;
var _pendingTimers = [];
var _cleanupFunctions = [];

function _dump(str) {
  let start = /^TEST-/.test(str) ? "\n" : "";
  dump(start + str);
}

// Disable automatic network detection, so tests work correctly when
// not connected to a network.
{
  let ios = Components.classes["@mozilla.org/network/io-service;1"]
             .getService(Components.interfaces.nsIIOService2);
  ios.manageOfflineStatus = false;
  ios.offline = false;
}

// Determine if we're running on parent or child
var runningInParent = true;
try {
  runningInParent = Components.classes["@mozilla.org/xre/runtime;1"].
                    getService(Components.interfaces.nsIXULRuntime).processType
                    == Components.interfaces.nsIXULRuntime.PROCESS_TYPE_DEFAULT;
}
catch (e) { }

try {
  if (runningInParent) {
    let prefs = Components.classes["@mozilla.org/preferences-service;1"]
                .getService(Components.interfaces.nsIPrefBranch);

    // disable necko IPC security checks for xpcshell, as they lack the
    // docshells needed to pass them
    prefs.setBoolPref("network.disable.ipc.security", true);

    // Disable IPv6 lookups for 'localhost' on windows.
    if ("@mozilla.org/windows-registry-key;1" in Components.classes) {
      prefs.setCharPref("network.dns.ipv4OnlyDomains", "localhost");
    }
  }
}
catch (e) { }

// Enable crash reporting, if possible
// We rely on the Python harness to set MOZ_CRASHREPORTER_NO_REPORT
// and handle checking for minidumps.
// Note that if we're in a child process, we don't want to init the
// crashreporter component.
try { // nsIXULRuntime is not available in some configurations.
  if (runningInParent &&
      "@mozilla.org/toolkit/crash-reporter;1" in Components.classes) {
    // Remember to update </toolkit/crashreporter/test/unit/test_crashreporter.js>
    // too if you change this initial setting.
    let crashReporter =
          Components.classes["@mozilla.org/toolkit/crash-reporter;1"]
          .getService(Components.interfaces.nsICrashReporter);
    crashReporter.enabled = true;
    crashReporter.minidumpPath = do_get_cwd();
  }
}
catch (e) { }

/**
 * Date.now() is not necessarily monotonically increasing (insert sob story
 * about times not being the right tool to use for measuring intervals of time,
 * robarnold can tell all), so be wary of error by erring by at least
 * _timerFuzz ms.
 */
const _timerFuzz = 15;

function _Timer(func, delay) {
  delay = Number(delay);
  if (delay < 0)
    do_throw("do_timeout() delay must be nonnegative");

  if (typeof func !== "function")
    do_throw("string callbacks no longer accepted; use a function!");

  this._func = func;
  this._start = Date.now();
  this._delay = delay;

  var timer = Components.classes["@mozilla.org/timer;1"]
                        .createInstance(Components.interfaces.nsITimer);
  timer.initWithCallback(this, delay + _timerFuzz, timer.TYPE_ONE_SHOT);

  // Keep timer alive until it fires
  _pendingTimers.push(timer);
}

_Timer.prototype = {
  QueryInterface: function(iid) {
    if (iid.equals(Components.interfaces.nsITimerCallback) ||
        iid.equals(Components.interfaces.nsISupports))
      return this;

    throw Components.results.NS_ERROR_NO_INTERFACE;
  },

  notify: function(timer) {
    _pendingTimers.splice(_pendingTimers.indexOf(timer), 1);

    // The current nsITimer implementation can undershoot, but even if it
    // couldn't, paranoia is probably a virtue here given the potential for
    // random orange on tinderboxen.
    var end = Date.now();
    var elapsed = end - this._start;
    if (elapsed >= this._delay) {
      try {
        this._func.call(null);
      } catch (e) {
        do_throw("exception thrown from do_timeout callback: " + e);
      }
      return;
    }

    // Timer undershot, retry with a little overshoot to try to avoid more
    // undershoots.
    var newDelay = this._delay - elapsed;
    do_timeout(newDelay, this._func);
  }
};

function _do_quit() {
  _dump("TEST-INFO | (xpcshell/head.js) | exiting test\n");

  _quit = true;
}

function _dump_exception_stack(stack) {
  stack.split("\n").forEach(function(frame) {
    if (!frame)
      return;
    // frame is of the form "fname(args)@file:line"
    let frame_regexp = new RegExp("(.*)\\(.*\\)@(.*):(\\d*)", "g");
    let parts = frame_regexp.exec(frame);
    if (parts)
        dump("JS frame :: " + parts[2] + " :: " + (parts[1] ? parts[1] : "anonymous")
             + " :: line " + parts[3] + "\n");
    else /* Could be a -e (command line string) style location. */
        dump("JS frame :: " + frame + "\n");
  });
}

/************** Functions to be used from the tests **************/

/**
 * Prints a message to the output log.
 */
function do_print(msg) {
  var caller_stack = Components.stack.caller;
  _dump("TEST-INFO | " + caller_stack.filename + " | " + msg + "\n");
}

/**
 * Calls the given function at least the specified number of milliseconds later.
 * The callback will not undershoot the given time, but it might overshoot --
 * don't expect precision!
 *
 * @param delay : uint
 *   the number of milliseconds to delay
 * @param callback : function() : void
 *   the function to call
 */
function do_timeout(delay, func) {
  new _Timer(func, Number(delay));
}

function do_execute_soon(callback) {
  do_test_pending();
  var tm = Components.classes["@mozilla.org/thread-manager;1"]
                     .getService(Components.interfaces.nsIThreadManager);

  tm.mainThread.dispatch({
    run: function() {
      try {
        callback();
      } catch (e) {
        // do_check failures are already logged and set _quit to true and throw
        // NS_ERROR_ABORT. If both of those are true it is likely this exception
        // has already been logged so there is no need to log it again. It's
        // possible that this will mask an NS_ERROR_ABORT that happens after a
        // do_check failure though.
        if (!_quit || e != Components.results.NS_ERROR_ABORT) {
          _dump("TEST-UNEXPECTED-FAIL | (xpcshell/head.js) | " + e);
          if (e.stack) {
            dump(" - See following stack:\n");
            _dump_exception_stack(e.stack);
          }
          else {
            dump("\n");
          }
          _do_quit();
        }
      }
      finally {
        do_test_finished();
      }
    }
  }, Components.interfaces.nsIThread.DISPATCH_NORMAL);
}

function do_throw(text, stack) {
  if (!stack)
    stack = Components.stack.caller;

  _dump("TEST-UNEXPECTED-FAIL | " + stack.filename + " | " + text +
        " - See following stack:\n");
  var frame = Components.stack;
  while (frame != null) {
    _dump(frame + "\n");
    frame = frame.caller;
  }

  _do_quit();
  throw Components.results.NS_ERROR_ABORT;
}

function do_throw_todo(text, stack) {
  if (!stack)
    stack = Components.stack.caller;

  _dump("TEST-UNEXPECTED-PASS | " + stack.filename + " | " + text +
        " - See following stack:\n");
  var frame = Components.stack;
  while (frame != null) {
    _dump(frame + "\n");
    frame = frame.caller;
  }

  _do_quit();
  throw Components.results.NS_ERROR_ABORT;
}

function do_report_unexpected_exception(ex, text) {
  var caller_stack = Components.stack.caller;
  text = text ? text + " - " : "";

  _dump("TEST-UNEXPECTED-FAIL | " + caller_stack.filename + " | " + text +
        "Unexpected exception " + ex + ", see following stack:\n" + ex.stack +
        "\n");

  _do_quit();
  throw Components.results.NS_ERROR_ABORT;
}

function do_note_exception(ex, text) {
  var caller_stack = Components.stack.caller;
  text = text ? text + " - " : "";

  _dump("TEST-INFO | " + caller_stack.filename + " | " + text +
        "Swallowed exception " + ex + ", see following stack:\n" + ex.stack +
        "\n");
}

function _do_check_neq(left, right, stack, todo) {
  if (!stack)
    stack = Components.stack.caller;

  var text = left + " != " + right;
  if (left == right) {
    if (!todo) {
      do_throw(text, stack);
    } else {
      _dump("TEST-KNOWN-FAIL | " + stack.filename + " | [" + stack.name +
            " : " + stack.lineNumber + "] " + text +"\n");
    }
  } else {
    if (!todo) {
      _dump("TEST-PASS | " + stack.filename + " | [" + stack.name + " : " +
            stack.lineNumber + "] " + text + "\n");
    } else {
      do_throw_todo(text, stack);
    }
  }
}

function do_check_neq(left, right, stack) {
  if (!stack)
    stack = Components.stack.caller;

  _do_check_neq(left, right, stack, false);
}

function todo_check_neq(left, right, stack) {
  if (!stack)
      stack = Components.stack.caller;

  _do_check_neq(left, right, stack, true);
}

function do_report_result(passed, text, stack, todo) {
  if (passed) {
    if (todo) {
      do_throw_todo(text, stack);
    } else {
      _dump("TEST-PASS | " + stack.filename + " | [" + stack.name + " : " +
            stack.lineNumber + "] " + text + "\n");
    }
  } else {
    if (todo) {
      _dump("TEST-KNOWN-FAIL | " + stack.filename + " | [" + stack.name +
            " : " + stack.lineNumber + "] " + text +"\n");
    } else {
      do_throw(text, stack);
    }
  }
}

/**
 * Checks for a true condition, with a success message.
 */
function ok(condition, msg) {
  do_report_result(condition, msg, Components.stack.caller, false);
}

/**
 * Checks for a condition equality, with a success message.
 */
function is(left, right, msg) {
  do_report_result(left === right, "[ " + left + " === " + right + " ] " + msg,
    Components.stack.caller, false);
}

function _do_check_eq(left, right, stack, todo) {
  if (!stack)
    stack = Components.stack.caller;

  var text = left + " == " + right;
  do_report_result(left == right, text, stack, todo);
}

function do_check_eq(left, right, stack) {
  if (!stack)
    stack = Components.stack.caller;

  _do_check_eq(left, right, stack, false);
}

function todo_check_eq(left, right, stack) {
  if (!stack)
      stack = Components.stack.caller;

  _do_check_eq(left, right, stack, true);
}

function do_check_true(condition, stack) {
  if (!stack)
    stack = Components.stack.caller;

  do_check_eq(condition, true, stack);
}

function todo_check_true(condition, stack) {
  if (!stack)
    stack = Components.stack.caller;

  todo_check_eq(condition, true, stack);
}

function do_check_false(condition, stack) {
  if (!stack)
    stack = Components.stack.caller;

  do_check_eq(condition, false, stack);
}

function todo_check_false(condition, stack) {
  if (!stack)
    stack = Components.stack.caller;

  todo_check_eq(condition, false, stack);
}

function do_check_null(condition, stack=Components.stack.caller) {
  do_check_eq(condition, null, stack);
}

function todo_check_null(condition, stack=Components.stack.caller) {
  todo_check_eq(condition, null, stack);
}

/**
 * Check that |value| matches |pattern|.
 *
 * A |value| matches a pattern |pattern| if any one of the following is true:
 *
 * - |value| and |pattern| are both objects; |pattern|'s enumerable
 *   properties' values are valid patterns; and for each enumerable
 *   property |p| of |pattern|, plus 'length' if present at all, |value|
 *   has a property |p| whose value matches |pattern.p|. Note that if |j|
 *   has other properties not present in |p|, |j| may still match |p|.
 *
 * - |value| and |pattern| are equal string, numeric, or boolean literals
 *
 * - |pattern| is |undefined| (this is a wildcard pattern)
 *
 * - typeof |pattern| == "function", and |pattern(value)| is true.
 *
 * For example:
 *
 * do_check_matches({x:1}, {x:1})       // pass
 * do_check_matches({x:1}, {})          // fail: all pattern props required
 * do_check_matches({x:1}, {x:2})       // fail: values must match
 * do_check_matches({x:1}, {x:1, y:2})  // pass: extra props tolerated
 *
 * // Property order is irrelevant.
 * do_check_matches({x:"foo", y:"bar"}, {y:"bar", x:"foo"}) // pass
 *
 * do_check_matches({x:undefined}, {x:1}) // pass: 'undefined' is wildcard
 * do_check_matches({x:undefined}, {x:2})
 * do_check_matches({x:undefined}, {y:2}) // fail: 'x' must still be there
 *
 * // Patterns nest.
 * do_check_matches({a:1, b:{c:2,d:undefined}}, {a:1, b:{c:2,d:3}})
 *
 * // 'length' property counts, even if non-enumerable.
 * do_check_matches([3,4,5], [3,4,5])     // pass
 * do_check_matches([3,4,5], [3,5,5])     // fail; value doesn't match
 * do_check_matches([3,4,5], [3,4,5,6])   // fail; length doesn't match
 *
 * // functions in patterns get applied.
 * do_check_matches({foo:v => v.length == 2}, {foo:"hi"}) // pass
 * do_check_matches({foo:v => v.length == 2}, {bar:"hi"}) // fail
 * do_check_matches({foo:v => v.length == 2}, {foo:"hello"}) // fail
 *
 * // We don't check constructors, prototypes, or classes. However, if
 * // pattern has a 'length' property, we require values to match that as
 * // well, even if 'length' is non-enumerable in the pattern. So arrays
 * // are useful as patterns.
 * do_check_matches({0:0, 1:1, length:2}, [0,1])  // pass
 * do_check_matches({0:1}, [1,2])                 // pass
 * do_check_matches([0], {0:0, length:1})         // pass
 *
 * Notes:
 *
 * The 'length' hack gives us reasonably intuitive handling of arrays.
 *
 * This is not a tight pattern-matcher; it's only good for checking data
 * from well-behaved sources. For example:
 * - By default, we don't mind values having extra properties.
 * - We don't check for proxies or getters.
 * - We don't check the prototype chain.
 * However, if you know the values are, say, JSON, which is pretty
 * well-behaved, and if you want to tolerate additional properties
 * appearing on the JSON for backward-compatibility, then do_check_matches
 * is ideal. If you do want to be more careful, you can use function
 * patterns to implement more stringent checks.
 */
function do_check_matches(pattern, value, stack=Components.stack.caller, todo=false) {
  var matcher = pattern_matcher(pattern);
  var text = "VALUE: " + uneval(value) + "\nPATTERN: " + uneval(pattern) + "\n";
  var diagnosis = []
  if (matcher(value, diagnosis)) {
    do_report_result(true, "value matches pattern:\n" + text, stack, todo);
  } else {
    text = ("value doesn't match pattern:\n" +
            text +
            "DIAGNOSIS: " +
            format_pattern_match_failure(diagnosis[0]) + "\n");
    do_report_result(false, text, stack, todo);
  }
}

function todo_check_matches(pattern, value, stack=Components.stack.caller) {
  do_check_matches(pattern, value, stack, true);
}

// Return a pattern-matching function of one argument, |value|, that
// returns true if |value| matches |pattern|.
//
// If the pattern doesn't match, and the pattern-matching function was
// passed its optional |diagnosis| argument, the pattern-matching function
// sets |diagnosis|'s '0' property to a JSON-ish description of the portion
// of the pattern that didn't match, which can be formatted legibly by
// format_pattern_match_failure.
function pattern_matcher(pattern) {
  function explain(diagnosis, reason) {
    if (diagnosis) {
      diagnosis[0] = reason;
    }
    return false;
  }
  if (typeof pattern == "function") {
    return pattern;
  } else if (typeof pattern == "object" && pattern) {
    var matchers = [];
    for (let p in pattern) {
      matchers.push([p, pattern_matcher(pattern[p])]);
    }
    // Kludge: include 'length', if not enumerable. (If it is enumerable,
    // we picked it up in the array comprehension, above.
    ld = Object.getOwnPropertyDescriptor(pattern, 'length');
    if (ld && !ld.enumerable) {
      matchers.push(['length', pattern_matcher(pattern.length)])
    }
    return function (value, diagnosis) {
      if (!(value && typeof value == "object")) {
        return explain(diagnosis, "value not object");
      }
      for (let [p, m] of matchers) {
        var element_diagnosis = [];
        if (!(p in value && m(value[p], element_diagnosis))) {
          return explain(diagnosis, { property:p,
                                      diagnosis:element_diagnosis[0] });
        }
      }
      return true;
    };
  } else if (pattern === undefined) {
    return function(value) { return true; };
  } else {
    return function (value, diagnosis) {
      if (value !== pattern) {
        return explain(diagnosis, "pattern " + uneval(pattern) + " not === to value " + uneval(value));
      }
      return true;
    };
  }
}

// Format an explanation for a pattern match failure, as stored in the
// second argument to a matching function.
function format_pattern_match_failure(diagnosis, indent="") {
  var a;
  if (!diagnosis) {
    a = "Matcher did not explain reason for mismatch.";
  } else if (typeof diagnosis == "string") {
    a = diagnosis;
  } else if (diagnosis.property) {
    a = "Property " + uneval(diagnosis.property) + " of object didn't match:\n";
    a += format_pattern_match_failure(diagnosis.diagnosis, indent + "  ");
  }
  return indent + a;
}

function do_test_pending() {
  ++_tests_pending;

  _dump("TEST-INFO | (xpcshell/head.js) | test " + _tests_pending +
         " pending\n");
}

function do_test_finished() {
  _dump("TEST-INFO | (xpcshell/head.js) | test " + _tests_pending +
         " finished\n");

  if (--_tests_pending == 0) {
    _do_execute_cleanup();
    _do_quit();
  }
}

function do_get_file(path, allowNonexistent) {
  try {
    let lf = Components.classes["@mozilla.org/file/directory_service;1"]
      .getService(Components.interfaces.nsIProperties)
      .get("CurWorkD", Components.interfaces.nsILocalFile);

    let bits = path.split("/");
    for (let i = 0; i < bits.length; i++) {
      if (bits[i]) {
        if (bits[i] == "..")
          lf = lf.parent;
        else
          lf.append(bits[i]);
      }
    }

    if (!allowNonexistent && !lf.exists()) {
      // Not using do_throw(): caller will continue.
      var stack = Components.stack.caller;
      _dump("TEST-UNEXPECTED-FAIL | " + stack.filename + " | [" +
            stack.name + " : " + stack.lineNumber + "] " + lf.path +
            " does not exist\n");
    }

    return lf;
  }
  catch (ex) {
    do_throw(ex.toString(), Components.stack.caller);
  }

  return null;
}

// do_get_cwd() isn't exactly self-explanatory, so provide a helper
function do_get_cwd() {
  return do_get_file("");
}

function do_load_manifest(path) {
  var lf = do_get_file(path);
  const nsIComponentRegistrar = Components.interfaces.nsIComponentRegistrar;
  do_check_true(Components.manager instanceof nsIComponentRegistrar);
  Components.manager.autoRegister(lf);
}

/**
 * Registers a function that will run when the test harness is done running all
 * tests.
 *
 * @param aFunction
 *        The function to be called when the test harness has finished running.
 */
function do_register_cleanup(func) {
  _dump("TEST-INFO | " + _TEST_FILE + " | " +
    (_gRunningTest ? _gRunningTest.name + " " : "") +
    "registering cleanup function.");

  _cleanupFunctions.push(func);
}

/**
 * Execute a function when the test harness is done running all tests.
 */
function _do_execute_cleanup() {
  let func;
  while ((func = _cleanupFunctions.pop())) {
    _dump("TEST-INFO | " + _TEST_FILE + " | executing cleanup function.");
    func();
  }
}

/**
 * Add a test function to the list of tests that are to be run asynchronously.
 *
 * Each test function must call run_next_test() when it's done. Test files
 * should call run_next_test() in their run_test function to execute all
 * async tests.
 *
 * @return the test function that was passed in.
 */
var _gTests = [];
function add_test(func) {
  _gTests.push([false, func]);
  return func;
}

// We lazy import Task.jsm so we don't incur a run-time penalty for all tests.
var _Task;

/**
 * Add a test function which is a Task function.
 *
 * Task functions are functions fed into Task.jsm's Task.spawn(). They are
 * generators that emit promises.
 *
 * If an exception is thrown, a do_check_* comparison fails, or if a rejected
 * promise is yielded, the test function aborts immediately and the test is
 * reported as a failure.
 *
 * Unlike add_test(), there is no need to call run_next_test(). The next test
 * will run automatically as soon the task function is exhausted. To trigger
 * premature (but successful) termination of the function, simply return or
 * throw a Task.Result instance.
 *
 * Example usage:
 *
 * add_task(function test() {
 *   let result = yield Promise.resolve(true);
 *
 *   do_check_true(result);
 *
 *   let secondary = yield someFunctionThatReturnsAPromise(result);
 *   do_check_eq(secondary, "expected value");
 * });
 *
 * add_task(function test_early_return() {
 *   let result = yield somethingThatReturnsAPromise();
 *
 *   if (!result) {
 *     // Test is ended immediately, with success.
 *     return;
 *   }
 *
 *   do_check_eq(result, "foo");
 * });
 */
function add_task(func) {
  if (!_Task) {
    let ns = {};
    _Task = Components.utils.import("resource://gre/modules/Task.jsm", ns).Task;
  }

  _gTests.push([true, func]);
}

/**
 * Runs the next test function from the list of async tests.
 */
var _gRunningTest = null;
var _gTestIndex = 0; // The index of the currently running test.
function run_next_test()
{
  function _run_next_test()
  {
    if (_gTestIndex < _gTests.length) {
      do_test_pending();
      let _isTask;
      [_isTask, _gRunningTest] = _gTests[_gTestIndex++];
      _dump("TEST-INFO | " + _TEST_FILE + " | Starting " + _gRunningTest.name);

      if (_isTask) {
        _Task.spawn(_gRunningTest)
             .then(run_next_test, do_report_unexpected_exception);
      } else {
        // Exceptions do not kill asynchronous tests, so they'll time out.
        try {
          _gRunningTest();
        } catch (e) {
          do_throw(e);
        }
      }
    }
  }

  // For sane stacks during failures, we execute this code soon, but not now.
  // We do this now, before we call do_test_finished(), to ensure the pending
  // counter (_tests_pending) never reaches 0 while we still have tests to run
  // (do_execute_soon bumps that counter).
  do_execute_soon(_run_next_test);

  if (_gRunningTest !== null) {
    // Close the previous test do_test_pending call.
    do_test_finished();
  }
}

/**
 * End of code adapted from xpcshell head.js
 */


/**
 * JavaBridge facilitates communication between Java and JS. See
 * JavascriptBridge.java for the corresponding JavascriptBridge and docs.
 */

function JavaBridge(obj) {

  this._EVENT_TYPE = "Robocop:JS";
  this._target = obj;
  // The number of replies needed to answer all outstanding sync calls.
  this._repliesNeeded = 0;
  this._Services.obs.addObserver(this, this._EVENT_TYPE, false);

  this._sendMessage("notify-loaded", []);
};

JavaBridge.prototype = {

  _Services: Components.utils.import(
    "resource://gre/modules/Services.jsm", {}).Services,

  _sendMessageToJava: Components.utils.import(
    "resource://gre/modules/Messaging.jsm", {}).Messaging.sendRequest,

  _sendMessage: function (innerType, args) {
    this._sendMessageToJava({
      type: this._EVENT_TYPE,
      innerType: innerType,
      method: args[0],
      args: Array.prototype.slice.call(args, 1),
    });
  },

  observe: function(subject, topic, data) {
    let message = JSON.parse(data);
    if (message.innerType === "sync-reply") {
      // Reply to our Javascript-to-Java sync call
      this._repliesNeeded--;
      return;
    }
    // Call the corresponding method on the target
    try {
      this._target[message.method].apply(this._target, message.args);
    } catch (e) {
      do_report_unexpected_exception(e, "Failed to call " + message.method);
    }
    if (message.innerType === "sync-call") {
      // Reply for sync message
      this._sendMessage("sync-reply", [message.method]);
    }
  },

  /**
   * Synchronously call a method in Java,
   * given the method name followed by a list of arguments.
   */
  syncCall: function (methodName /*, ... */) {
    this._sendMessage("sync-call", arguments);
    let thread = this._Services.tm.currentThread;
    let initialReplies = this._repliesNeeded;
    // Need one more reply to answer the current sync call.
    this._repliesNeeded++;
    // Wait for the reply to arrive. Normally we would not want to
    // spin the event loop, but here we're in a test and our API
    // specifies a synchronous call, so we spin the loop to wait for
    // the call to finish.
    while (this._repliesNeeded > initialReplies) {
      thread.processNextEvent(true);
    }
  },

  /**
   * Asynchronously call a method in Java,
   * given the method name followed by a list of arguments.
   */
  asyncCall: function (methodName /*, ... */) {
    this._sendMessage("async-call", arguments);
  },

  /**
   * Disconnect with Java.
   */
  disconnect: function () {
    this._Services.obs.removeObserver(this, this._EVENT_TYPE);
  },
};