<!DOCTYPE html>
<meta charset="UTF-8">
<link rel="help" href="https://drafts.csswg.org/css-position-3/#propdef-top">
<meta name="assert" content="top supports animation as a length or percentage">

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

<style>
.parent {
  top: 30px;
  margin-bottom: 40px;
}
.target {
  position: relative;
  width: 10px;
  height: 10px;
  background-color: black;
  display: inline-block;
  top: 10px;
}
.expected {
  background-color: green;
  margin-right: 10px;
}
</style>

<body></body>

<script>
test_interpolation({
  property: 'top',
  from: neutralKeyframe,
  to: '20px',
}, [
  {at: -0.3, expect: '7px'},
  {at: 0, expect: '10px'},
  {at: 0.5, expect: '15px'},
  {at: 1, expect: '20px'},
  {at: 1.5, expect: '25px'},
]);

test_no_interpolation({
  property: 'top',
  from: 'initial',
  to: '20px',
});

test_interpolation({
  property: 'top',
  from: 'inherit',
  to: '20px',
}, [
  {at: -0.3, expect: '33px'},
  {at: 0, expect: '30px'},
  {at: 0.5, expect: '25px'},
  {at: 1, expect: '20px'},
  {at: 1.5, expect: '15px'},
]);

test_no_interpolation({
  property: 'top',
  from: 'unset',
  to: '20px',
});

test_interpolation({
  property: 'top',
  from: '-10px',
  to: '10px'
}, [
  {at: -0.3, expect: '-16px'},
  {at: 0, expect: '-10px'},
  {at: 0.5, expect: '0px'},
  {at: 1, expect: '10px'},
  {at: 1.5, expect: '20px'}
]);
</script>
