mirror of
https://github.com/servo/servo.git
synced 2025-08-06 06:00:15 +01:00
47 lines
1.8 KiB
HTML
47 lines
1.8 KiB
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>
|