first-contentful-canvas.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-canvas.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<head>

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

</head>

<body>

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

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

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

<canvas id="canvas" width="200" height="200" ></canvas>

<script>

setup({"hide_test_state": true});

async_test(function (t) {

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

    const canvas = document.getElementById("canvas");

    const context = canvas.getContext("2d");

    context.beginPath();

    context.moveTo(0,0);

    context.lineTo(300,150);

    context.stroke();

    assertPaintTimingEntries(t, 20);

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

</script>

</body>

</html>