Revision d1463947fea0898b42b2cb1bfd8ee40b1619bc71 authored by Simon Pieters on 27 August 2018, 13:57:36 UTC, committed by Simon Pieters on 27 August 2018, 13:57:36 UTC
1 parent 425e3ae
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>
![swh spinner](/static/img/swh-spinner.gif)
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