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
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
<!doctype html>
<meta charset="utf-8">
<title>PressureObserver on DOMWindow of detached iframe</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/test-only-api.js"></script>
<script src="resources/pressure-helpers.js"></script>
<body>
<script>
'use strict';
test(() => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const frame_window = iframe.contentWindow;
iframe.remove();
assert_equals(undefined, frame_window.PressureObserver);
}, 'PressureObserver constructor does not exist in detached iframes');
promise_test(async t => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const frame_window = iframe.contentWindow;
const observer = new frame_window.PressureObserver(() => {});
const iframe_DOMException = frame_window.DOMException;
iframe.remove();
// Calling observe() from a detached iframe should fail but not crash.
await promise_rejects_dom(t, 'NotSupportedError', iframe_DOMException,
observer.observe('cpu'));
}, 'PressureObserver.observe() on detached frame rejects');
promise_test(async t => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const frame_window = iframe.contentWindow;
const observer = new frame_window.PressureObserver(() => {});
await observer.observe('cpu');
iframe.remove();
// Calling disconnect() from a detached iframe should not crash.
observer.disconnect();
}, 'PressureObserver.disconnect() on detached frame returns');
pressure_test(async (t, mockPressureService) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const frame_window = iframe.contentWindow;
const observer = new frame_window.PressureObserver(() => {});
const iframe_DOMException = frame_window.DOMException;
// await is intentionally not used here. We want to remove the iframe while
// the returned Promise settles.
observer.observe('cpu');
iframe.remove();
// Establish an observer and wait for changes in the main frame. This should
// keep the test running long enough to catch any crash from the observe()
// call in the removed iframe's PressureObserver.
const changes = await new Promise((resolve, reject) => {
const observer = new PressureObserver(resolve);
t.add_cleanup(() => observer.disconnect());
observer.observe('cpu').catch(reject);
mockPressureService.setPressureUpdate('cpu', 'critical');
mockPressureService.startPlatformCollector(/*sampleInterval=*/ 200);
});
assert_equals(changes[0].state, 'critical');
}, 'Detaching frame while PressureObserver.observe() settles');
pressure_test(async (t, mockPressureService) => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
const frame_window = iframe.contentWindow;
const observer = new frame_window.PressureObserver(() => {
assert_unreached('The observer callback should not be called');
});
await observer.observe('cpu');
mockPressureService.setPressureUpdate('cpu', 'critical');
mockPressureService.startPlatformCollector(/*sampleInterval=*/ 200);
iframe.remove();
return new Promise(resolve => t.step_timeout(resolve, 1000));
}, 'PressureObserver on detached frame returns with no callback');
</script>
</body>
|
