mirror of
https://github.com/servo/servo.git
synced 2025-08-06 14:10:11 +01:00
41 lines
1.4 KiB
HTML
41 lines
1.4 KiB
HTML
<!DOCTYPE html>
|
|
<head>
|
|
<title>Performance Paint Timing Test: FCP due to background image</title>
|
|
</head>
|
|
<body>
|
|
<script src="/resources/testharness.js"></script>
|
|
<script src="/resources/testharnessreport.js"></script>
|
|
<div id="main"></div>
|
|
</body>
|
|
|
|
<footer>
|
|
<script>
|
|
async_test(function (t) {
|
|
const body = document.getElementsByTagName('body')[0];
|
|
body.style.backgroundImage = 'url(resources/circles.png)';
|
|
window.onload = function() {
|
|
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, "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");
|
|
t.done();
|
|
});
|
|
}
|
|
t.step(function() {
|
|
testPaintEntries();
|
|
});
|
|
};
|
|
}, "First contentful paint fires due to background image render.");
|
|
</script>
|
|
<footer>
|
|
</html>
|