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
|
<!DOCTYPE html>
<meta charset=utf-8>
<title>Pausing an animation</title>
<link rel="help"
href="https://drafts.csswg.org/web-animations/#pausing-an-animation-section">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../../testcommon.js"></script>
<body>
<div id="log"></div>
<script>
'use strict';
promise_test(async t => {
const animation = createDiv(t).animate(null, 100 * MS_PER_SEC);
await animation.ready;
const startTimeBeforePausing = animation.startTime;
animation.pause();
assert_equals(animation.startTime, startTimeBeforePausing,
'The start time does not change when pausing-pending');
await animation.ready;
assert_equals(animation.startTime, null,
'The start time is unresolved when paused');
}, 'Pausing clears the start time');
promise_test(async t => {
const animation = createDiv(t).animate(null, 100 * MS_PER_SEC);
await animation.ready;
animation.pause();
assert_not_equals(animation.startTime, null,
'The start time is resolved when pause-pending');
animation.play();
assert_not_equals(animation.startTime, null,
'The start time is preserved when a pause is aborted');
}, 'Aborting a pause preserves the start time');
promise_test(async t => {
const animation = createDiv(t).animate(null, 100 * MS_PER_SEC);
const promise = animation.ready;
animation.pause();
const promiseResult = await promise;
assert_equals(promiseResult, animation);
assert_equals(animation.ready, promise);
assert_false(animation.pending, 'No longer pause-pending');
}, 'A pending ready promise should be resolved and not replaced when the'
+ ' animation is paused');
promise_test(async t => {
const animation = createDiv(t).animate(null, 100 * MS_PER_SEC);
// Let animation start roughly half-way through
animation.currentTime = 50 * MS_PER_SEC;
await animation.ready;
// Go pause-pending and also set a pending playback rate
animation.pause();
animation.updatePlaybackRate(0.5);
await animation.ready;
// If the current time was updated using the new playback rate it will jump
// back to 25s but if we correctly used the old playback rate the current time
// will be >= 50s.
assert_greater_than_equal(animation.currentTime, 50 * MS_PER_SEC);
}, 'A pause-pending animation maintains the current time when applying a'
+ ' pending playback rate');
promise_test(async t => {
// This test does not cover a specific step in the algorithm but serves as a
// high-level sanity check that pausing does, in fact, freeze the current
// time.
const animation = createDiv(t).animate(null, 100 * MS_PER_SEC);
await animation.ready;
animation.pause();
await animation.ready;
const currentTimeAfterPausing = animation.currentTime;
await waitForNextFrame();
assert_equals(animation.currentTime, currentTimeAfterPausing,
'Animation.currentTime is unchanged after pausing');
}, 'The animation\'s current time remains fixed after pausing');
promise_test(async t => {
const animation = createDiv(t).animate(null, 100 * MS_PER_SEC);
const originalReadyPromise = animation.ready;
animation.cancel();
assert_equals(animation.startTime, null);
assert_equals(animation.currentTime, null);
const readyPromise = animation.ready;
assert_not_equals(originalReadyPromise, readyPromise,
'Canceling an animation should create a new ready promise');
animation.pause();
assert_equals(animation.playState, 'paused',
'Pausing a canceled animation should update the play state');
assert_true(animation.pending, 'animation should be pause-pending');
await animation.ready;
assert_false(animation.pending,
'animation should no longer be pause-pending');
assert_equals(animation.startTime, null, 'start time should be unresolved');
assert_equals(animation.currentTime, 0, 'current time should be set to zero');
}, 'Pausing a canceled animation sets the current time');
</script>
</body>
|
