164 lines
5.2 KiB
HTML
164 lines
5.2 KiB
HTML
<!DOCTYPE html>
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<meta charset=utf-8>
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<title>Reversing an animation</title>
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<link rel="help"
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href="https://drafts.csswg.org/web-animations/#reversing-an-animation-section">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="/web-animations/testcommon.js"></script>
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<script src="testcommon.js"></script>
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<style>
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.scroller {
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overflow: auto;
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height: 100px;
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width: 100px;
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will-change: transform;
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}
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.contents {
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height: 1000px;
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width: 100%;
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}
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</style>
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<body>
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<script>
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'use strict';
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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animation.reverse();
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animation.currentTime = CSSNumericValue.parse("40%");
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await animation.ready;
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assert_percents_equal(animation.currentTime, 40);
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}, 'Setting current time while reverse-pending preserves currentTime');
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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animation.play();
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await animation.ready;
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animation.currentTime = CSSNumericValue.parse("50%");
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const previousPlaybackRate = animation.playbackRate;
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animation.reverse();
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assert_equals(animation.playbackRate, previousPlaybackRate,
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'Playback rate should not have changed');
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await animation.ready;
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assert_equals(animation.playbackRate, -previousPlaybackRate,
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'Playback rate should be inverted');
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}, 'Reversing an animation inverts the playback rate');
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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animation.play();
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animation.currentTime = CSSNumericValue.parse("40%");
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await animation.ready;
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assert_percents_equal(animation.startTime, -40);
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assert_percents_equal(animation.currentTime, 40);
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animation.reverse();
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await animation.ready;
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assert_percents_equal(animation.startTime, 100);
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assert_percents_equal(animation.currentTime, 100);
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}, 'Reversing an animation resets a sticky start time.');
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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animation.play();
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assert_true(animation.pending,
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'The animation is pending before we call reverse');
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animation.reverse();
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assert_true(animation.pending,
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'The animation is still pending after calling reverse');
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}, 'Reversing an animation does not cause it to leave the pending state');
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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animation.play();
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let readyResolved = false;
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animation.ready.then(() => { readyResolved = true; });
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animation.reverse();
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await Promise.resolve();
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assert_false(readyResolved,
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'ready promise should not have been resolved yet');
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}, 'Reversing an animation does not cause it to resolve the ready promise');
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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animation.play();
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animation.playbackRate = -1;
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animation.reverse();
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await animation.ready;
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assert_percents_equal(animation.currentTime, 0);
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}, 'Reversing an animation with a negative playback rate should cause ' +
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'the animation to play in a forward direction');
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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animation.play();
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animation.playbackRate = 0;
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animation.currentTime = CSSNumericValue.parse("50%");
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animation.reverse();
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await animation.ready;
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assert_equals(animation.playbackRate, 0,
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'reverse() should preserve playbackRate if the playbackRate == 0');
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assert_percents_equal(animation.currentTime, 0,
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'Anchors to range start boundary when playback rate is zero');
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}, 'Reversing when when playbackRate == 0 should preserve the playback rate');
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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assert_equals(animation.currentTime, null);
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animation.reverse();
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await animation.ready;
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assert_percents_equal(animation.startTime, 100,
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'animation.startTime should be at its effect end');
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assert_percents_equal(animation.currentTime, 100,
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'animation.currentTime should be at its effect end');
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}, 'Reversing an idle animation aligns startTime with the rangeEnd boundary');
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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const scroller = animation.timeline.source;
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// Make the scroll timeline inactive.
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scroller.style.overflow = 'visible';
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scroller.scrollTop;
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await waitForNextFrame();
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assert_throws_dom('InvalidStateError', () => { animation.reverse(); });
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}, 'Reversing an animation without an active timeline throws an ' +
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'InvalidStateError');
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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animation.play();
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animation.currentTime = CSSNumericValue.parse("50%");
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animation.pause();
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await animation.ready;
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animation.reverse();
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assert_equals(animation.playState, 'running',
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'Animation.playState should be "running" after reverse()');
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}, 'Reversing an animation plays a pausing animation');
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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animation.play();
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await animation.ready;
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animation.updatePlaybackRate(2);
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animation.reverse();
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await animation.ready;
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assert_equals(animation.playbackRate, -2);
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}, 'Reversing should use the negative pending playback rate');
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</script>
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</body>
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