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

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

<style>
.parent {
  transform-origin: 30px 10px;
}
.target {
  display: inline-block;
  margin-top: 50px;
  margin-bottom: 25px;
  width: 50px;
  height: 50px;
  background: red;
  transform: scale(1.5);
  transform-origin: 10px 30px;
}
.expected {
  background: green;
  position: relative;
  left: -50px;
}
</style>

<body></body>

<script>
test_interpolation({
  property: 'transform-origin',
  from: neutralKeyframe,
  to: '20px 20px',
}, [
  {at: -0.3, expect: '7px 33px'},
  {at: 0, expect: '10px 30px'},
  {at: 0.3, expect: '13px 27px'},
  {at: 0.6, expect: '16px 24px'},
  {at: 1, expect: '20px 20px'},
  {at: 1.5, expect: '25px 15px'},
]);

test_interpolation({
  property: 'transform-origin',
  from: 'initial',
  to: '20px 20px',
}, [
  {at: -0.3, expect: '26.5px 26.5px'},
  {at: 0, expect: '25px 25px'},
  {at: 0.3, expect: '23.5px 23.5px'},
  {at: 0.6, expect: '22px 22px'},
  {at: 1, expect: '20px 20px'},
  {at: 1.5, expect: '17.5px 17.5px'},
]);

test_interpolation({
  property: 'transform-origin',
  from: 'inherit',
  to: '20px 20px',
}, [
  {at: -0.3, expect: '33px 7px'},
  {at: 0, expect: '30px 10px'},
  {at: 0.3, expect: '27px 13px'},
  {at: 0.6, expect: '24px 16px'},
  {at: 1, expect: '20px 20px'},
  {at: 1.5, expect: '15px 25px'},
]);

test_interpolation({
  property: 'transform-origin',
  from: 'unset',
  to: '20px 20px',
}, [
  {at: -0.3, expect: '26.5px 26.5px'},
  {at: 0, expect: '25px 25px'},
  {at: 0.3, expect: '23.5px 23.5px'},
  {at: 0.6, expect: '22px 22px'},
  {at: 1, expect: '20px 20px'},
  {at: 1.5, expect: '17.5px 17.5px'},
]);

test_interpolation({
  property: 'transform-origin',
  from: 'top left',
  to: 'bottom right',
}, [
  {at: -0.3, expect: '-15px -15px'},
  {at: 0, expect: '0px 0px'},
  {at: 0.3, expect: '15px 15px'},
  {at: 0.6, expect: '30px 30px'},
  {at: 1, expect: '50px 50px'},
  {at: 1.5, expect: '75px 75px'},
]);

test_interpolation({
  property: 'transform-origin',
  from: 'center center',
  to: '0% 100px',
}, [
  {at: -0.3, expect: '32.5px 2.5px'},
  {at: 0, expect: '25px 25px'},
  {at: 0.3, expect: '17.5px 47.5px'},
  {at: 0.6, expect: '10px 70px'},
  {at: 1, expect: '0px 100px'},
  {at: 1.5, expect: '-12.5px 137.5px'},
]);

test_interpolation({
  property: 'transform-origin',
  from: '0% 50% 5px',
  to: '100% 150% 0px'
}, [
  {at: -0.3, expect: '-30% 20% 6.5px'},
  {at: 0, expect: '0% 50% 5px'},
  {at: 0.3, expect: '30% 80% 3.5px'},
  {at: 0.6, expect: '60% 110% 2px'},
  {at: 1, expect: '100% 150% 0px'},
  {at: 1.5, expect: '150% 200% -2.5px'},
]);
</script>