/* 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 () {
let docLoaded = waitForEvent(
Ci.nsIAccessibleEvent.EVENT_DOCUMENT_LOAD_COMPLETE,
"body"
);
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,
Accessibility Test
`,
},
async function () {
let docLoadedEvent = await docLoaded;
let docAcc = docLoadedEvent.accessibleDocument;
ok(docAcc, "Accessible document proxy is created");
// Remove unnecessary dangling references
docLoaded = null;
docLoadedEvent = null;
forceGC();
let acc = docAcc.getChildAt(0);
ok(acc, "Accessible proxy is created");
let canShutdown = false;
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 proxy.
forceGC();
// Have some breathing room when removing a11y service references.
await TestUtils.waitForTick();
// Remove a reference to an accessible document proxy.
docAcc = null;
ok(!docAcc, "Accessible document proxy 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.
acc = null;
ok(!acc, "Accessible proxy is removed");
// Force garbage collection that should now trigger shutdown.
forceGC();
await a11yShutdown;
}
);
});