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<!doctype html>
<meta charset=utf-8>
<script src="../testcommon.js"></script>
<style>
:root {
--var-100px: 100px;
}
</style>
<body>
<script>
'use strict';
function getKeyframes(e) {
return e.getAnimations()[0].effect.getKeyframes();
}
function assert_frames_equal(a, b, name) {
assert_equals(Object.keys(a).sort().toString(),
Object.keys(b).sort().toString(),
"properties on " + name);
for (var p in a) {
assert_equals(a[p], b[p], "value for '" + p + "' on " + name);
}
}
test(function(t) {
var div = addDiv(t);
div.style.left = '0px';
window.getComputedStyle(div).transitionProperty;
div.style.transition = 'left 100s';
div.style.left = '100px';
var frames = getKeyframes(div);
assert_equals(frames.length, 2, "number of frames");
var expected = [
{ offset: 0, computedOffset: 0, easing: "ease", left: "0px" },
{ offset: 1, computedOffset: 1, easing: "linear", left: "100px" },
];
for (var i = 0; i < frames.length; i++) {
assert_frames_equal(frames[i], expected[i], "ComputedKeyframe #" + i);
}
}, 'KeyframeEffectReadOnly.getKeyframes() returns expected frames for a simple'
+ ' transition');
test(function(t) {
var div = addDiv(t);
div.style.left = '0px';
window.getComputedStyle(div).transitionProperty;
div.style.transition = 'left 100s steps(2,end)';
div.style.left = '100px';
var frames = getKeyframes(div);
assert_equals(frames.length, 2, "number of frames");
var expected = [
{ offset: 0, computedOffset: 0, easing: "steps(2)", left: "0px" },
{ offset: 1, computedOffset: 1, easing: "linear", left: "100px" },
];
for (var i = 0; i < frames.length; i++) {
assert_frames_equal(frames[i], expected[i], "ComputedKeyframe #" + i);
}
}, 'KeyframeEffectReadOnly.getKeyframes() returns expected frames for a simple'
+ ' transition with a non-default easing function');
test(function(t) {
var div = addDiv(t);
div.style.left = '0px';
window.getComputedStyle(div).transitionProperty;
div.style.transition = 'left 100s';
div.style.left = 'var(--var-100px)';
var frames = getKeyframes(div);
// CSS transition endpoints are based on the computed value so we
// shouldn't see the variable reference
var expected = [
{ offset: 0, computedOffset: 0, easing: 'ease', left: '0px' },
{ offset: 1, computedOffset: 1, easing: 'linear', left: '100px' },
];
for (var i = 0; i < frames.length; i++) {
assert_frames_equal(frames[i], expected[i], "ComputedKeyframe #" + i);
}
}, 'KeyframeEffectReadOnly.getKeyframes() returns expected frames for a'
+ ' transition with a CSS variable endpoint');
done();
</script>
</body>
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