chromium/third_party/blink/web_tests/external/wpt/css/css-typed-om/the-stylepropertymap/properties/background.html

<!doctype html>
<meta charset="utf-8">
<title>'background' property</title>
<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#dom-stylepropertymap-get">
<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#dom-stylepropertymap-set">
<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#property-stle-value-normalization">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../../resources/testhelper.js"></script>
<script src="resources/testsuite.js"></script>
<body>
<div id="log"></div>
<script>
'use strict';

runPropertyTests('background', []);
runUnsupportedPropertyTests('background', [
  'green', 'content-box radial-gradient(crimson, skyblue)',
  'no-repeat url("http://foo.com")',
  'left 5% / 15% 60% repeat-x url("http://foo.com")',
  'center / contain no-repeat url("foo.com"), red'
]);

</script>