<!DOCTYPE html>
<meta charset="UTF-8">
<title>box-shadow composition</title>
<link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#box-shadow">
<meta name="test" content="box-shadow supports animation">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/interpolation-testcommon.js"></script>
<style>
.target {
  width: 40px;
  height: 40px;
  background-color: black;
}
.expected {
  background-color: green;
}
</style>
<body>
<script>
test_composition({
  property: 'box-shadow',
  replaceFrom: 'rgb(100, 100, 100) 10px 20px 30px 40px',
  addTo: 'rgb(200, 200, 200) 20px 40px 60px 80px',
}, [
  {at: -0.3, expect: 'rgb(70, 70, 70 ) 7px 14px 21px 28px'},
  {at: 0, expect: 'rgb(100, 100, 100) 10px 20px 30px 40px'},
  {at: 0.5, expect: 'rgb(150, 150, 150) 15px 30px 45px 60px'},
  {at: 1, expect: 'rgb(200, 200, 200) 20px 40px 60px 80px'},
  {at: 1.5, expect: 'rgb(250, 250, 250) 25px 50px 75px 100px'},
]);

test_composition({
  property: 'box-shadow',
  underlying: 'rgb(10, 20, 30) 1px 2px 3px 4px',
  addFrom: 'rgb(100, 100, 100) 10px 20px 30px 40px',
  addTo: 'rgb(200, 200, 200) 20px 40px 60px 80px',
}, [
  {at: -0.3, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(70, 70, 70) 7px 14px 21px 28px'},
  {at: 0, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(100, 100, 100) 10px 20px 30px 40px'},
  {at: 0.5, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(150, 150, 150) 15px 30px 45px 60px'},
  {at: 1, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(200, 200, 200) 20px 40px 60px 80px'},
  {at: 1.5, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(250, 250, 250) 25px 50px 75px 100px'},
]);
test_composition({
  property: 'box-shadow',
  underlying: 'rgb(10, 20, 30) 1px 2px 3px 4px',
  addFrom: 'rgb(100, 100, 100) 10px 20px 30px 40px inset',
  addTo: 'rgb(200, 200, 200) 20px 40px 60px 80px inset',
}, [
  {at: -0.3, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(70, 70, 70) 7px 14px 21px 28px inset'},
  {at: 0, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(100, 100, 100) 10px 20px 30px 40px inset'},
  {at: 0.5, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(150, 150, 150) 15px 30px 45px 60px inset'},
  {at: 1, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(200, 200, 200) 20px 40px 60px 80px inset'},
  {at: 1.5, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(250, 250, 250) 25px 50px 75px 100px inset'},
]);
test_composition({
  property: 'box-shadow',
  underlying: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(20, 40, 60) 2px 4px 6px 8px',
  addFrom: 'rgb(100, 100, 100) 10px 20px 30px 40px',
  addTo: 'rgb(200, 200, 200) 20px 40px 60px 80px',
}, [
  {at: -0.3, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(20, 40, 60) 2px 4px 6px 8px, rgb(70, 70, 70) 7px 14px 21px 28px'},
  {at: 0, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(20, 40, 60) 2px 4px 6px 8px, rgb(100, 100, 100) 10px 20px 30px 40px'},
  {at: 0.5, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(20, 40, 60) 2px 4px 6px 8px, rgb(150, 150, 150) 15px 30px 45px 60px'},
  {at: 1, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(20, 40, 60) 2px 4px 6px 8px, rgb(200, 200, 200) 20px 40px 60px 80px'},
  {at: 1.5, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(20, 40, 60) 2px 4px 6px 8px, rgb(250, 250, 250) 25px 50px 75px 100px'},
]);
test_composition({
  property: 'box-shadow',
  underlying: 'rgb(10, 20, 30) 1px 2px 3px 4px',
  addFrom: 'rgb(100, 100, 100) 10px 20px 30px 40px, rgb(100, 100, 100) 10px 20px 30px 40px inset',
  addTo: 'rgb(200, 200, 200) 20px 40px 60px 80px, rgb(200, 200, 200) 20px 40px 60px 80px inset',
}, [
  {at: -0.3, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(70, 70, 70) 7px 14px 21px 28px, rgb(70, 70, 70) 7px 14px 21px 28px inset'},
  {at: 0, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(100, 100, 100) 10px 20px 30px 40px, rgb(100, 100, 100) 10px 20px 30px 40px inset'},
  {at: 0.5, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(150, 150, 150) 15px 30px 45px 60px, rgb(150, 150, 150) 15px 30px 45px 60px inset'},
  {at: 1, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(200, 200, 200) 20px 40px 60px 80px, rgb(200, 200, 200) 20px 40px 60px 80px inset'},
  {at: 1.5, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(250, 250, 250) 25px 50px 75px 100px, rgb(250, 250, 250) 25px 50px 75px 100px inset'},
]);
test_composition({
  property: 'box-shadow',
  underlying: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(20, 40, 60) 2px 4px 6px 8px',
  addFrom: 'rgb(100, 100, 100) 10px 20px 30px 40px',
  replaceTo: 'rgb(200, 200, 200) 20px 40px 60px 80px',
}, [
  {at: -0.3, expect: 'rgb(0, 0, 0) -4.7px -9.4px 0px -18.8px, rgb(26, 52, 78) 2.6px 5.2px 7.8px 10.4px, rgb(130, 130, 130) 13px 26px 39px 52px'},
  {at: 0, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(20, 40, 60) 2px 4px 6px 8px, rgb(100, 100, 100) 10px 20px 30px 40px'},
  {at: 0.5, expect: 'rgb(105, 110, 115) 10.5px 21px 31.5px 42px, rgba(20, 40, 60, 0.5) 1px 2px 3px 4px, rgba(100, 100, 100, 0.5) 5px 10px 15px 20px'},
  {at: 1, expect: 'rgb(200, 200, 200) 20px 40px 60px 80px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px'},
  {at: 1.5, expect: 'rgb(255, 255, 255) 29.5px 59px 88.5px 118px, rgba(0, 0, 0, 0) -1px -2px 0px -4px, rgba(0, 0, 0, 0) -5px -10px 0px -20px'},
]);
test_composition({
  property: 'box-shadow',
  underlying: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(20, 40, 60) 2px 4px 6px 8px',
  replaceFrom: 'rgb(100, 100, 100) 10px 20px 30px 40px',
  addTo: 'rgb(200, 200, 200) 20px 40px 60px 80px',
}, [
  {at: -0.3, expect: 'rgb(127, 124, 121) 12.7px 25.4px 38.1px 50.8px, rgba(0, 0, 0, 0) -0.6px -1.2px 0px -2.4px, rgba(0, 0, 0, 0) -6px -12px 0px -24px'},
  {at: 0, expect: 'rgb(100, 100, 100) 10px 20px 30px 40px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px'},
  {at: 0.5, expect: 'rgb(55, 60, 65) 5.5px 11px 16.5px 22px, rgba(20, 40, 60, 0.5) 1px 2px 3px 4px, rgba(200, 200, 200, 0.5) 10px 20px 30px 40px'},
  {at: 1, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(20, 40, 60) 2px 4px 6px 8px, rgb(200, 200, 200) 20px 40px 60px 80px'},
  {at: 1.5, expect: 'rgb(0, 0, 0) -3.5px -7px 0px -14px, rgb(30, 60, 90) 3px 6px 9px 12px, rgb(255, 255, 255) 30px 60px 90px 120px'},
]);
test_composition({
  property: 'box-shadow',
  underlying: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(20, 40, 60) 2px 4px 6px 8px, rgb(40, 80, 120) 4px 8px 12px 16px',
  addFrom: 'rgb(100, 100, 100) 10px 20px 30px 40px, rgb(200, 200, 200) 20px 40px 60px 80px',
  replaceTo: 'rgb(200, 200, 200) 20px 40px 60px 80px',
}, [
  {at: -0.3, expect: 'rgb(0, 0, 0) -4.7px -9.4px 0px -18.8px, rgb(26, 52, 78) 2.6px 5.2px 7.8px 10.4px, rgb(52, 104, 156) 5.2px 10.4px 15.6px 20.8px, rgb(130, 130, 130) 13px 26px 39px 52px, rgb(255, 255, 255) 26px 52px 78px 104px'},
  {at: 0, expect: 'rgb(10, 20, 30) 1px 2px 3px 4px, rgb(20, 40, 60) 2px 4px 6px 8px, rgb(40, 80, 120) 4px 8px 12px 16px, rgb(100, 100, 100) 10px 20px 30px 40px, rgb(200, 200, 200) 20px 40px 60px 80px'},
  {at: 0.5, expect: 'rgb(105, 110, 115) 10.5px 21px 31.5px 42px, rgba(20, 40, 60, 0.5) 1px 2px 3px 4px, rgba(40, 80, 120, 0.5) 2px 4px 6px 8px, rgba(100, 100, 100, 0.5) 5px 10px 15px 20px, rgba(200, 200, 200, 0.5) 10px 20px 30px 40px'},
  {at: 1, expect: 'rgb(200, 200, 200) 20px 40px 60px 80px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px'},
  {at: 1.5, expect: 'rgb(255, 255, 255) 29.5px 59px 88.5px 118px, rgba(0, 0, 0, 0) -1px -2px 0px -4px, rgba(0, 0, 0, 0) -2px -4px 0px -8px, rgba(0, 0, 0, 0) -5px -10px 0px -20px, rgba(0, 0, 0, 0) -10px -20px 0px -40px'},
]);
</script>
</body>
