first-contentful-bg-image.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /paint-timing/first-contentful-bg-image.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<head>

<title>Performance Paint Timing Test: FCP due to background image</title>

</head>

<body>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="resources/utils.js"></script>

<div id="main"></div>

</body>

<footer>

<script>

setup({"hide_test_state": true});

async_test(function (t) {

    assert_implements(window.PerformancePaintTiming, "Paint Timing isn't supported.");

    const body = document.getElementsByTagName('body')[0];

    body.style.backgroundImage = 'url(resources/circles.png)';

    window.onload = function() {

        assertPaintTimingEntries(t, 20);

};

}, "First contentful paint fires due to background image render.");

</script>

<footer>

</html>