blob: 40eaa635bbccc1e346e68c2da2db3a268ab71cc5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
<!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>
setup({"hide_test_state": true});
async_test(function (t) {
assert_implements(window.PerformancePaintTiming, "Paint Timing isn't supported.");
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>
|
