1// Copyright 2012 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Flags: --harmony-object-observe
29// Flags: --allow-natives-syntax
30
31var ordering = [];
32function reset() {
33  ordering = [];
34}
35
36function assertArrayValues(expected, actual) {
37  assertEquals(expected.length, actual.length);
38  for (var i = 0; i < expected.length; i++) {
39    assertEquals(expected[i], actual[i]);
40  }
41}
42
43function assertOrdering(expected) {
44  %RunMicrotasks();
45  assertArrayValues(expected, ordering);
46}
47
48function newPromise(id, fn) {
49  var r;
50  var t = 1;
51  var promise = new Promise(function(resolve) {
52    r = resolve;
53    if (fn) fn();
54  });
55
56  var next = promise.then(function(value) {
57    ordering.push('p' + id);
58    return value;
59  });
60
61  return {
62    resolve: r,
63    then: function(fn) {
64      next = next.then(function(value) {
65        ordering.push('p' + id + ':' + t++);
66        return fn ? fn(value) : value;
67      });
68
69      return this;
70    }
71  };
72}
73
74function newObserver(id, fn, obj) {
75  var observer = {
76    value: 1,
77    recordCounts: []
78  };
79
80  Object.observe(observer, function(records) {
81    ordering.push('o' + id);
82    observer.recordCounts.push(records.length);
83    if (fn) fn();
84  });
85
86  return observer;
87}
88
89
90(function PromiseThens() {
91  reset();
92
93  var p1 = newPromise(1).then();
94  var p2 = newPromise(2).then();
95
96  p1.resolve();
97  p2.resolve();
98
99  assertOrdering(['p1', 'p2', 'p1:1', 'p2:1']);
100})();
101
102
103(function ObserversBatch() {
104  reset();
105
106  var p1 = newPromise(1);
107  var p2 = newPromise(2);
108  var p3 = newPromise(3);
109
110  var ob1 = newObserver(1);
111  var ob2 = newObserver(2, function() {
112    ob3.value++;
113    p3.resolve();
114    ob1.value++;
115  });
116  var ob3 = newObserver(3);
117
118  p1.resolve();
119  ob1.value++;
120  p2.resolve();
121  ob2.value++;
122
123  assertOrdering(['p1', 'o1', 'o2', 'p2', 'o1', 'o3', 'p3']);
124  assertArrayValues([1, 1], ob1.recordCounts);
125  assertArrayValues([1], ob2.recordCounts);
126  assertArrayValues([1], ob3.recordCounts);
127})();
128
129
130(function ObserversGetAllRecords() {
131  reset();
132
133  var p1 = newPromise(1);
134  var p2 = newPromise(2);
135  var ob1 = newObserver(1, function() {
136    ob2.value++;
137  });
138  var ob2 = newObserver(2);
139
140  p1.resolve();
141  ob1.value++;
142  p2.resolve();
143  ob2.value++;
144
145  assertOrdering(['p1', 'o1', 'o2', 'p2']);
146  assertArrayValues([1], ob1.recordCounts);
147  assertArrayValues([2], ob2.recordCounts);
148})();
149
150
151(function NewObserverDeliveryGetsNewMicrotask() {
152  reset();
153
154  var p1 = newPromise(1);
155  var p2 = newPromise(2);
156  var ob1 = newObserver(1);
157  var ob2 = newObserver(2, function() {
158    ob1.value++;
159  });
160
161  p1.resolve();
162  ob1.value++;
163  p2.resolve();
164  ob2.value++;
165
166  assertOrdering(['p1', 'o1', 'o2', 'p2', 'o1']);
167  assertArrayValues([1, 1], ob1.recordCounts);
168  assertArrayValues([1], ob2.recordCounts);
169})();
170