96 lines
3.4 KiB
JavaScript
96 lines
3.4 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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await BrowserTestUtils.withNewTab(
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{
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gBrowser,
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url: `data:text/html,
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<html>
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<head>
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<meta charset="utf-8"/>
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<title>Accessibility Test</title>
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</head>
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<body></body>
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</html>`,
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},
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async function (browser) {
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info(
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"Creating a service in parent and waiting for service to be created " +
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"in content"
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);
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await loadContentScripts(browser, {
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script: "Common.sys.mjs",
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symbol: "CommonUtils",
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});
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// Create a11y service in the main process. This will trigger creating of
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// the a11y service in parent as well.
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const [parentA11yInitObserver, parentA11yInit] = initAccService();
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const [contentA11yInitObserver, contentA11yInit] =
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initAccService(browser);
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await Promise.all([parentA11yInitObserver, contentA11yInitObserver]);
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let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
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Ci.nsIAccessibilityService
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);
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ok(accService, "Service initialized in parent");
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await Promise.all([parentA11yInit, contentA11yInit]);
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info(
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"Adding additional reference to accessibility service in content " +
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"process"
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);
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// Add a new reference to the a11y service inside the content process.
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await SpecialPowers.spawn(browser, [], () => {
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content.CommonUtils.accService;
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});
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info(
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"Trying to shut down a service in content and making sure it stays " +
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"alive as it was started by parent"
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);
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let contentCanShutdown = false;
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// This promise will resolve only if contentCanShutdown flag is set to true.
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// If 'a11y-init-or-shutdown' event with '0' flag (in content) comes before
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// it can be shut down, the promise will reject.
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const [contentA11yShutdownObserver, contentA11yShutdownPromise] =
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shutdownAccService(browser);
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await contentA11yShutdownObserver;
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const contentA11yShutdown = new Promise((resolve, reject) =>
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contentA11yShutdownPromise.then(() =>
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contentCanShutdown
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? resolve()
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: reject("Accessible service was shut down incorrectly")
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)
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);
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// Remove a11y service reference in content and force garbage collection.
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// This should not trigger shutdown since a11y was originally initialized by
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// the main process.
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await SpecialPowers.spawn(browser, [], () => {
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content.CommonUtils.clearAccService();
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});
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// Have some breathing room between a11y service shutdowns.
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await TestUtils.waitForTick();
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info("Removing a service in parent");
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// Now allow a11y service to shutdown in content.
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contentCanShutdown = true;
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// Remove the a11y service reference in the main process.
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const [parentA11yShutdownObserver, parentA11yShutdown] =
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shutdownAccService();
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await parentA11yShutdownObserver;
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accService = null;
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ok(!accService, "Service is removed in parent");
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// Force garbage collection that should trigger shutdown in both parent and
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// content.
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forceGC();
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await Promise.all([parentA11yShutdown, contentA11yShutdown]);
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}
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);
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});
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