Revision 47d3a27b5697f47bc76923b80ff9cfbde1d57580 authored by Servo WPT Sync on 13 March 2018, 19:31:58 UTC, committed by GitHub on 13 March 2018, 19:31:58 UTC
Merge pull request #10011 from sync_ef805cb3832c2deaf1ab8fc4f3353b65671e6f32
first-image-child.html
<!DOCTYPE html>
<head>
<title>Performance Paint Timing Test: child ignores parent FCP</title>
</head>
<body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="image"></div>
<script>
async_test(function (t) {
const iframe = document.createElement('iframe');
iframe.id = 'child-iframe';
iframe.src = 'resources/subframe-sending-paint.html';
document.body.appendChild(iframe);
window.addEventListener('message', t.step_func(e => {
// Child iframe should not have any paint-timing entries.
assert_equals(e.data, '0');
t.done();
}));
const img = document.createElement('IMG');
img.src = 'resources/circles.png';
img.onload = function() {
function testPaintEntries() {
const bufferedEntries = performance.getEntriesByType('paint');
if (bufferedEntries.length < 2) {
t.step_timeout(testPaintEntries, 20);
return;
}
t.step(function() {
assert_equals(bufferedEntries.length, 2, 'There should be two paint timing instances.');
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');
// Ask child iframe to send its paint-timing entries.
document.getElementById('child-iframe').
contentWindow.postMessage('', '*');
})
}
testPaintEntries();
};
document.getElementById('image').appendChild(img);
}, 'Child iframe ignores paint-timing events fired from parent image rendering.');
</script>
</body>
</html>
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