<!DOCTYPE html>
<head>
<title>Performance Paint Timing Test</title>
</head>
<body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="main"></div>

<script>
async_test(function(t) {
    t.step(function() {
        const bufferedEntries = performance.getEntriesByType('paint');
        assert_equals(bufferedEntries.length, 0, "No paint entries yet");
    });
    const div = document.createElement("div");
    div.style.width = "100px";
    div.style.height = "100px";
    div.style.backgroundColor = "red";
    div.style.color = "blue";
    div.innerHTML = "test"
    document.getElementById("main").appendChild(div);
    function testPaintEntries() {
        const bufferedEntries = performance.getEntriesByType('paint');
        if (bufferedEntries.length < 2) {
            t.step_timeout(function() {
                testPaintEntries();
            }, 20);
            return;
        }
        t.step(function() {
            assert_equals(bufferedEntries.length, 2, "FP and FCP.");
            assert_equals(bufferedEntries[0].entryType, "paint");
            assert_equals(bufferedEntries[0].name, "first-paint");
            assert_equals(bufferedEntries[1].entryType, "paint");
            assert_equals(bufferedEntries[1].name, "first-contentful-paint");
            t.done();
        });
    }
    t.step(function() {
        testPaintEntries();
    });
}, "Basic test to check existence of FP and FCP.");
</script>
</body>
</html>