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
|
<!DOCTYPE html>
<meta charset=utf-8>
<title>Setting the playback rate of an animation</title>
<link rel="help" href="https://drafts.csswg.org/web-animations/#setting-the-playback-rate-of-an-animation">
<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);
animation.playbackRate = 2;
await animation.ready;
const previousAnimationCurrentTime = animation.currentTime;
const previousTimelineCurrentTime = animation.timeline.currentTime;
await waitForAnimationFrames(1);
const animationCurrentTimeDifference =
animation.currentTime - previousAnimationCurrentTime;
const timelineCurrentTimeDifference =
animation.timeline.currentTime - previousTimelineCurrentTime;
assert_times_equal(
animationCurrentTimeDifference,
timelineCurrentTimeDifference * animation.playbackRate,
'The current time should increase two times faster than timeline'
);
}, 'The playback rate affects the rate of progress of the current time');
test(t => {
const animation = createDiv(t).animate(null, 100 * MS_PER_SEC);
animation.currentTime = 50 * MS_PER_SEC;
animation.playbackRate = 2;
assert_time_equals_literal(animation.currentTime, 50 * MS_PER_SEC);
}, 'Setting the playback rate while play-pending preserves the current time');
promise_test(async t => {
const animation = createDiv(t).animate(null, 100 * MS_PER_SEC);
animation.currentTime = 50 * MS_PER_SEC;
await animation.ready;
animation.playbackRate = 2;
assert_greater_than_equal(animation.currentTime, 50 * MS_PER_SEC);
assert_less_than(animation.currentTime, 100 * MS_PER_SEC);
}, 'Setting the playback rate while playing preserves the current time');
promise_test(async t => {
const animation = createDiv(t).animate(null, 100 * MS_PER_SEC);
animation.currentTime = 50 * MS_PER_SEC;
animation.updatePlaybackRate(2);
animation.playbackRate = 1;
await animation.ready;
assert_equals(animation.playbackRate, 1);
}, 'Setting the playback rate should clear any pending playback rate');
promise_test(async t => {
const animation = createDiv(t).animate(null, 100 * MS_PER_SEC);
animation.currentTime = 50 * MS_PER_SEC;
animation.pause();
await animation.ready;
animation.playbackRate = 2;
// Ensure that the animation remains paused and current time is preserved.
assert_equals(animation.playState, 'paused');
assert_time_equals_literal(animation.currentTime, 50 * MS_PER_SEC);
}, 'Setting the playback rate while paused preserves the current time and '
+ 'state');
promise_test(async t => {
const animation = createDiv(t).animate(null, 100 * MS_PER_SEC);
animation.currentTime = 150 * MS_PER_SEC;
await animation.ready;
animation.playbackRate = 2;
// Ensure that current time is preserved and does not snap to the effect end
// time.
assert_equals(animation.playState, 'finished');
assert_time_equals_literal(animation.currentTime, 150 * MS_PER_SEC);
}, 'Setting the playback rate while finished preserves the current time');
promise_test(async t => {
const animation = createDiv(t).animate(null, 100 * MS_PER_SEC);
animation.currentTime = 150 * MS_PER_SEC;
await animation.ready;
assert_equals(animation.playState, 'finished');
animation.playbackRate = -1;
// Ensure that current time does not snap to the effect end time and that the
// animation resumes playing.
assert_equals(animation.playState, 'running');
assert_time_equals_literal(animation.currentTime, 150 * MS_PER_SEC);
await waitForAnimationFrames(2);
assert_less_than(animation.currentTime, 150 * MS_PER_SEC);
}, 'Reversing the playback rate while finished restarts the animation');
promise_test(async t => {
const animation = createDiv(t).animate(null, 100 * MS_PER_SEC);
await animation.ready;
animation.currentTime = 50 * MS_PER_SEC;
animation.playbackRate = 0;
// Ensure that current time does not drift.
assert_equals(animation.playState, 'running');
await waitForAnimationFrames(2);
assert_time_equals_literal(animation.currentTime, 50 * MS_PER_SEC);
}, 'Setting a zero playback rate while running preserves the current time');
</script>
</body>
|
