<!DOCTYPE html>
<meta charset="UTF-8">
<link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#background-size">
<meta name="test" content="background-size supports animation as a repeatable list">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/interpolation-testcommon.js"></script>
<style>
.parent {
background-size: 100px 100px;
}
.target {
width: 80px;
height: 100px;
display: inline-block;
border: 10px solid black;
background-repeat: no-repeat;
background-image: url(../resources/stripes-100.png),
url(../resources/stripes-100.png),
url(../resources/blue-100.png),
url(../resources/green-100.png);
background-position: left top, right top, left bottom, right bottom;
background-size: 10px 10px;
}
.expected {
margin-right: 10px;
border-color: green;
}
</style>
<body></body>
<script>
// neutral
test_interpolation({
property: 'background-size',
from: neutralKeyframe,
to: '20px 20px, 0px 0px',
}, [
{at: -0.25, expect: ' 7.5px 7.5px, 12.5px 12.5px, 7.5px 7.5px, 12.5px 12.5px'},
{at: 0, expect: '10.0px 10.0px, 10.0px 10.0px, 10.0px 10.0px, 10.0px 10.0px'},
{at: 0.25, expect: '12.5px 12.5px, 7.5px 7.5px, 12.5px 12.5px, 7.5px 7.5px'},
{at: 0.5, expect: '15.0px 15.0px, 5.0px 5.0px, 15.0px 15.0px, 5.0px 5.0px'},
{at: 0.75, expect: '17.5px 17.5px, 2.5px 2.5px, 17.5px 17.5px, 2.5px 2.5px'},
{at: 1, expect: '20.0px 20.0px, 0.0px 0.0px, 20.0px 20.0px, 0.0px 0.0px'},
{at: 1.25, expect: '22.5px 22.5px, 0.0px 0.0px, 22.5px 22.5px, 0.0px 0.0px'},
]);
// initial
test_no_interpolation({
property: 'background-size',
from: 'initial',
to: '20px 20px, 0px 0px',
});
// inherit
test_interpolation({
property: 'background-size',
from: 'inherit',
to: '20px 20px, 0px 0px',
}, [
{at: -0.25, expect: '120px 120px, 125px 125px, 120px 120px, 125px 125px'},
{at: 0, expect: '100px 100px, 100px 100px, 100px 100px, 100px 100px'},
{at: 0.25, expect: ' 80px 80px, 75px 75px, 80px 80px, 75px 75px'},
{at: 0.5, expect: ' 60px 60px, 50px 50px, 60px 60px, 50px 50px'},
{at: 0.75, expect: ' 40px 40px, 25px 25px, 40px 40px, 25px 25px'},
{at: 1, expect: ' 20px 20px, 0px 0px, 20px 20px, 0px 0px'},
{at: 1.25, expect: ' 0px 0px, 0px 0px, 0px 0px, 0px 0px'},
]);
// unset
test_no_interpolation({
property: 'background-size',
from: 'unset',
to: '20px 20px, 0px 0px',
});
// Matched keywords in size value list.
test_interpolation({
property: 'background-size',
from: '0px auto, 0px 0px, contain, cover',
to: '40px auto, 40px 40px, contain, cover',
}, [
{at: -0.25, expect: ' 0px auto, 0px 0px, contain, cover'},
{at: 0, expect: ' 0px auto, 0px 0px, contain, cover'},
{at: 0.25, expect: '10px auto, 10px 10px, contain, cover'},
{at: 0.5, expect: '20px auto, 20px 20px, contain, cover'},
{at: 0.75, expect: '30px auto, 30px 30px, contain, cover'},
{at: 1, expect: '40px auto, 40px 40px, contain, cover'},
{at: 1.25, expect: '50px auto, 50px 50px, contain, cover'},
]);
// Mismatched keywords in size value list.
test_no_interpolation({
property: 'background-size',
from: '0px 0px, 0px 0px, contain, cover',
to: '40px 40px, 40px 40px, cover, contain',
});
test_no_interpolation({
property: 'background-size',
from: '0px auto, 0px 0px',
to: 'auto 40px, 40px 40px',
});
// Equal number of size values as background images.
test_interpolation({
property: 'background-size',
from: '0px 0px, 0px 0px, 0px 0px, 0px 0px',
to: '20px 20px, 40px 40px, 60px 60px, 100px 100px',
}, [
{at: -0.25, expect: ' 0px 0px, 0px 0px, 0px 0px, 0px 0px'},
{at: 0, expect: ' 0px 0px, 0px 0px, 0px 0px, 0px 0px'},
{at: 0.25, expect: ' 5px 5px, 10px 10px, 15px 15px, 25px 25px'},
{at: 0.5, expect: '10px 10px, 20px 20px, 30px 30px, 50px 50px'},
{at: 0.75, expect: '15px 15px, 30px 30px, 45px 45px, 75px 75px'},
{at: 1, expect: '20px 20px, 40px 40px, 60px 60px, 100px 100px'},
{at: 1.25, expect: '25px 25px, 50px 50px, 75px 75px, 125px 125px'},
]);
// Single size value repeated over background images.
test_interpolation({
property: 'background-size',
from: '0px 0px',
to: '80px 80px',
}, [
{at: -0.25, expect: ' 0px 0px, 0px 0px, 0px 0px, 0px 0px'},
{at: 0, expect: ' 0px 0px, 0px 0px, 0px 0px, 0px 0px'},
{at: 0.25, expect: ' 20px 20px, 20px 20px, 20px 20px, 20px 20px'},
{at: 0.5, expect: ' 40px 40px, 40px 40px, 40px 40px, 40px 40px'},
{at: 0.75, expect: ' 60px 60px, 60px 60px, 60px 60px, 60px 60px'},
{at: 1, expect: ' 80px 80px, 80px 80px, 80px 80px, 80px 80px'},
{at: 1.25, expect: '100px 100px, 100px 100px, 100px 100px, 100px 100px'},
]);
test_interpolation({
property: 'background-size',
from: '0px',
to: '80px',
}, [
{at: -0.25, expect: ' 0px, 0px, 0px, 0px'},
{at: 0, expect: ' 0px, 0px, 0px, 0px'},
{at: 0.25, expect: ' 20px, 20px, 20px, 20px'},
{at: 0.5, expect: ' 40px, 40px, 40px, 40px'},
{at: 0.75, expect: ' 60px, 60px, 60px, 60px'},
{at: 1, expect: ' 80px, 80px, 80px, 80px'},
{at: 1.25, expect: '100px, 100px, 100px, 100px'},
]);
// Mismatched numbers of size values.
test_interpolation({
property: 'background-size',
from: '0px 0px, 80px 0px',
to: '40px 40px, 80px 80px, 0px 80px',
}, [
{at: -0.25, expect: ' 0px 0px, 80px 0px, 0px 0px, 90px 0px'},
{at: 0, expect: ' 0px 0px, 80px 0px, 0px 0px, 80px 0px'},
{at: 0.25, expect: '10px 10px, 80px 20px, 0px 20px, 70px 10px'},
{at: 0.5, expect: '20px 20px, 80px 40px, 0px 40px, 60px 20px'},
{at: 0.75, expect: '30px 30px, 80px 60px, 0px 60px, 50px 30px'},
{at: 1, expect: '40px 40px, 80px 80px, 0px 80px, 40px 40px'},
{at: 1.25, expect: '50px 50px, 80px 100px, 0px 100px, 30px 50px'},
]);
</script>
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