blob: 975eab55a037a8753ad838fcddf8281746ea7868 (
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
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
add_task(async function () {
// Create a11y service.
const [a11yInitObserver, a11yInit] = initAccService();
await a11yInitObserver;
let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
Ci.nsIAccessibilityService
);
await a11yInit;
ok(accService, "Service initialized");
// Accessible object reference will live longer than the scope of this
// function.
let acc = await new Promise(resolve => {
let intervalId = setInterval(() => {
let tabAcc = accService.getAccessibleFor(gBrowser.selectedTab);
if (tabAcc) {
clearInterval(intervalId);
resolve(tabAcc);
}
}, 10);
});
ok(acc, "Accessible object is created");
let canShutdown = false;
// This promise will resolve only if canShutdown flag is set to true. If
// 'a11y-init-or-shutdown' event with '0' flag comes before it can be shut
// down, the promise will reject.
const [a11yShutdownObserver, a11yShutdownPromise] = shutdownAccService();
await a11yShutdownObserver;
const a11yShutdown = new Promise((resolve, reject) =>
a11yShutdownPromise.then(() =>
canShutdown
? resolve()
: reject("Accessible service was shut down incorrectly")
)
);
accService = null;
ok(!accService, "Service is removed");
// Force garbage collection that should not trigger shutdown because there is
// a reference to an accessible object.
forceGC();
// Have some breathing room when removing a11y service references.
await TestUtils.waitForTick();
// Now allow a11y service to shutdown.
canShutdown = true;
// Remove a reference to an accessible object.
acc = null;
ok(!acc, "Accessible object is removed");
// Force garbage collection that should now trigger shutdown.
forceGC();
await a11yShutdown;
});
|
