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1ce5193a91
MozReview-Commit-ID: BeIn3ThKQAx --HG-- extra : rebase_source : 02a3d9583a55a186bc6bb5c0308c6a88d72daf13
48 lines
1.6 KiB
JavaScript
48 lines
1.6 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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add_task(async function() {
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// Create a11y service.
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let a11yInit = initPromise();
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let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
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Ci.nsIAccessibilityService);
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await a11yInit;
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ok(accService, "Service initialized");
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// Accessible document reference will live longer than the scope of this
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// function.
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let docAcc = accService.getAccessibleFor(document);
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ok(docAcc, "Accessible document is created");
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let canShutdown = false;
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// This promise will resolve only if canShutdown flag is set to true. If
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// 'a11y-init-or-shutdown' event with '0' flag comes before it can be shut
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// down, the promise will reject.
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let a11yShutdown = new Promise((resolve, reject) =>
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shutdownPromise().then(flag => canShutdown ? resolve() :
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reject("Accessible service was shut down incorrectly")));
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accService = null;
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ok(!accService, "Service is removed");
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// Force garbage collection that should not trigger shutdown because there is
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// a reference to an accessible document.
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forceGC();
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// Have some breathing room when removing a11y service references.
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await new Promise(resolve => executeSoon(resolve));
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// Now allow a11y service to shutdown.
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canShutdown = true;
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// Remove a reference to an accessible document.
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docAcc = null;
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ok(!docAcc, "Accessible document is removed");
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// Force garbage collection that should now trigger shutdown.
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forceGC();
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await a11yShutdown;
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});
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