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
44
45
46
47
48
49
|
<!DOCTYPE HTML>
<html>
<head onload>
<meta charset="utf-8" />
<title>This test validates increasing the buffer size in onresourcetimingbufferfull callback of resource timing.</title>
<link rel="help" href="http://www.w3.org/TR/resource-timing/#performanceresourcetiming"/>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/buffer-full-utilities.js"></script>
</head>
<body>
<script>
const resource_timing_buffer_size = 1;
let eventFired = false;
setup(() => {
// Get the browser into a consistent state.
clearBufferAndSetSize(resource_timing_buffer_size);
var increase = function() {
performance.setResourceTimingBufferSize(resource_timing_buffer_size * 2);
eventFired = true;
}
performance.addEventListener('resourcetimingbufferfull', increase);
});
let overflowTheBuffer = () => {
return new Promise(resolve => {
// This resource overflows the entry buffer, and goes into the secondary buffer.
appendScript('resources/empty_script.js', resolve);
});
};
let testThatBufferContainsTheRightResources = () => {
let entries = performance.getEntriesByType('resource');
assert_equals(entries.length, 2,
'Both entries should be stored in resource timing buffer since its increases size once it overflows.');
assert_true(entries[0].name.includes('empty.js'), "empty.js is in the entries buffer");
assert_true(entries[1].name.includes('empty_script.js'), "empty_script.js is in the entries buffer");
};
promise_test(async () => {
await fillUpTheBufferWithSingleResource("resources/empty.js");
await overflowTheBuffer();
await waitForEventToFire();
testThatBufferContainsTheRightResources();
}, "Test that increasing the buffer during the callback is enough for entries not to be dropped");
</script>
</body>
</html>
|
