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/* 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 () {
const [a11yInitObserver, a11yInit] = initAccService();
await a11yInitObserver;
let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
Ci.nsIAccessibilityService
);
ok(accService, "Service initialized");
await a11yInit;
await BrowserTestUtils.withNewTab(
{
gBrowser,
url: `data:text/html,
<html>
<head>
<meta charset="utf-8"/>
<title>Accessibility Test</title>
</head>
<body><div id="div" style="visibility: hidden;"></div></body>
</html>`,
},
async function (browser) {
let onShow = waitForEvent(Ci.nsIAccessibleEvent.EVENT_SHOW, "div");
await invokeSetStyle(browser, "div", "visibility", "visible");
let showEvent = await onShow;
let divAcc = showEvent.accessible;
ok(divAcc, "Accessible proxy is created");
// Remove unnecessary dangling references
onShow = null;
showEvent = null;
forceGC();
let canShutdown = false;
const [a11yShutdownObserver, a11yShutdownPromise] = shutdownAccService();
await a11yShutdownObserver;
const a11yShutdown = new Promise((resolve, reject) =>
a11yShutdownPromise.then(flag =>
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 proxy.
forceGC();
// Have some breathing room when removing a11y service references.
await TestUtils.waitForTick();
// Now allow a11y service to shutdown.
canShutdown = true;
// Remove a last reference to an accessible proxy.
divAcc = null;
ok(!divAcc, "Accessible proxy is removed");
// Force garbage collection that should now trigger shutdown.
forceGC();
await a11yShutdown;
}
);
});
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