<!DOCTYPE html>
<meta charset="UTF-8">
<body>
<script src="../interpolation/resources/interpolation-test.js"></script>
<script>
assertComposition({
  property: 'y',
  underlying: '50px',
  addFrom: '100px',
  addTo: '200px',
}, [
  {at: -0.3, is: '120px'},
  {at: 0, is: '150px'},
  {at: 0.5, is: '200px'},
  {at: 1, is: '250px'},
  {at: 1.5, is: '300px'},
]);

assertComposition({
  property: 'y',
  underlying: '100px',
  addFrom: '10px',
  addTo: '2px',
}, [
  {at: -0.5, is: '114px'},
  {at: 0, is: '110px'},
  {at: 0.5, is: '106px'},
  {at: 1, is: '102px'},
  {at: 1.5, is: '98px'},
]);

assertComposition({
  property: 'y',
  underlying: '50px',
  addFrom: '100px',
  replaceTo: '200px',
}, [
  {at: -0.3, is: '135px'},
  {at: 0, is: '150px'},
  {at: 0.5, is: '175px'},
  {at: 1, is: '200px'},
  {at: 1.5, is: '225px'},
]);
</script>
</body>