<!DOCTYPE html>
<meta charset="UTF-8">
<title>transform interpolation</title>
<link rel="help" href="https://drafts.csswg.org/css-transforms/#transform-property">
<meta name="assert" content="transform supports animation as a transform list">

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/interpolation-testcommon.js"></script>

<style>
.parent {
  transform: translate(30px);
}
.target {
  color: white;
  width: 100px;
  height: 100px;
  background-color: black;
  display: inline-block;
  overflow: hidden;
  transform: translate(10px);
}
.expected {
  background-color: green;
}
.parent {
  transform: 30px;
}
.target > div {
  width: 10px;
  height: 10px;
  display: inline-block;
  background: orange;
  margin: 1px;
}
.test {
  overflow: hidden;
}
</style>

<body>
  <template id="target-template">
    <div></div>
 </template>
</body>

<script>
test_interpolation({
  property: 'transform',
  from: neutralKeyframe,
  to: 'translate(20px)',
}, [
  {at: -1, expect: 'translate(0px)'},
  {at: 0, expect: 'translate(10px)'},
  {at: 0.25, expect: 'translate(12.5px)'},
  {at: 0.75, expect: 'translate(17.5px)'},
  {at: 1, expect: 'translate(20px)'},
  {at: 2, expect: 'translate(30px)'},
]);

test_interpolation({
  property: 'transform',
  from: 'initial',
  to: 'translate(20px)',
}, [
  {at: -1, expect: 'translate(-20px)'},
  {at: 0, expect: 'translate(0px)'},
  {at: 0.25, expect: 'translate(5px)'},
  {at: 0.75, expect: 'translate(15px)'},
  {at: 1, expect: 'translate(20px)'},
  {at: 2, expect: 'translate(40px)'},
]);

test_interpolation({
  property: 'transform',
  from: 'inherit',
  to: 'translate(20px)',
}, [
  {at: -1, expect: 'translate(40px)'},
  {at: 0, expect: 'translate(30px)'},
  {at: 0.25, expect: 'translate(27.5px)'},
  {at: 0.75, expect: 'translate(22.5px)'},
  {at: 1, expect: 'translate(20px)'},
  {at: 2, expect: 'translate(10px)'},
]);

test_interpolation({
  property: 'transform',
  from: 'unset',
  to: 'translate(20px)',
}, [
  {at: -1, expect: 'translate(-20px)'},
  {at: 0, expect: 'translate(0px)'},
  {at: 0.25, expect: 'translate(5px)'},
  {at: 0.75, expect: 'translate(15px)'},
  {at: 1, expect: 'translate(20px)'},
  {at: 2, expect: 'translate(40px)'},
]);
</script>