fcp-ignore-from-subframe.html

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This WPT test may be referenced by the following Test IDs:
- /paint-timing/fcp-only/fcp-ignore-from-subframe.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<head>

    <title>

        Performance Paint Timing Test: Paints in the iframe should be reported in the iframe

        and not in the top document

    </title>

</head>

<body>

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

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

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

<script>

setup({"hide_test_state": true});

promise_test(async t => {

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

    const iframe = document.createElement('iframe');

    iframe.src = '../resources/subframe-painting.html';

    document.body.appendChild(iframe);

    await new Promise(resolve => window.addEventListener('message', e => {

        if (e.data.entryType == "paint" && e.data.name == "first-contentful-paint")

            resolve()

    }));

    await assertNoFirstContentfulPaint(t);

}, 'Parent frame should not fire own paint-timing events for subframes.');

</script>

</body>

</html>