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The accessibility tests currently rely, in many places, on lexical variables defined in global frame scripts being available to other non-global frame scripts. While that is currently the case, it will stop being so soon. And, while the simplest solution would be to define them as properties on the frame message manager by using `var` rather than `let`, storing references to the current content window in a frame script scope is unsafe at best, and should be avoided at all costs. MozReview-Commit-ID: 4FCGtLgcFzl --HG-- extra : rebase_source : d21206c9f119ca0ce61f9956f84a2e2d11484bca
101 lines
4.5 KiB
JavaScript
101 lines
4.5 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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// Making sure that the e10s is enabled on Windows for testing.
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await setE10sPrefs();
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await BrowserTestUtils.withNewTab({
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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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}, async function(browser) {
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info("Creating a service in parent and waiting for service to be created " +
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"in content");
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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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let parentA11yInit = initPromise();
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let contentA11yInit = initPromise(browser);
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let contentConsumersChanged =
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ContentTask.spawn(browser, {}, a11yConsumersChangedPromise);
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let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
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Ci.nsIAccessibilityService);
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ok(accService, "Service initialized in parent");
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await Promise.all([parentA11yInit, contentA11yInit]);
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await contentConsumersChanged.then(data => Assert.deepEqual(data, {
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XPCOM: false, MainProcess: true, PlatformAPI: false
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}, "Accessibility service consumers in content are correct."));
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info("Adding additional reference to accessibility service in content " +
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"process");
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contentConsumersChanged =
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ContentTask.spawn(browser, {}, a11yConsumersChangedPromise);
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// Add a new reference to the a11y service inside the content process.
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loadFrameScripts(browser, `var accService = Components.classes[
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'@mozilla.org/accessibilityService;1'].getService(
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Components.interfaces.nsIAccessibilityService);`);
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await contentConsumersChanged.then(data => Assert.deepEqual(data, {
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XPCOM: true, MainProcess: true, PlatformAPI: false
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}, "Accessibility service consumers in content are correct."));
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const contentConsumers = await ContentTask.spawn(browser, {}, () =>
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accService.getConsumers());
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Assert.deepEqual(JSON.parse(contentConsumers), {
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XPCOM: true, MainProcess: true, PlatformAPI: false
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}, "Accessibility service consumers in parent are correct.");
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info("Shutting down a service in parent and making sure the one in " +
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"content stays alive");
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let contentCanShutdown = false;
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let parentA11yShutdown = shutdownPromise();
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contentConsumersChanged =
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ContentTask.spawn(browser, {}, a11yConsumersChangedPromise);
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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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let contentA11yShutdown = new Promise((resolve, reject) =>
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shutdownPromise(browser).then(flag => contentCanShutdown ?
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resolve() : reject("Accessible service was shut down incorrectly")));
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// Remove a11y service reference in the main process and force garbage
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// collection. This should not trigger shutdown in content since a11y
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// service is used by XPCOM.
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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 not trigger shutdown because there
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// is a reference in a content process.
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forceGC();
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loadFrameScripts(browser, `Components.utils.forceGC();`);
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await parentA11yShutdown;
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await contentConsumersChanged.then(data => Assert.deepEqual(data, {
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XPCOM: true, MainProcess: false, PlatformAPI: false
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}, "Accessibility service consumers in content are correct."));
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// Have some breathing room between a11y service shutdowns.
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await new Promise(resolve => executeSoon(resolve));
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info("Removing a service in content");
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// Now allow a11y service to shutdown in content.
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contentCanShutdown = true;
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contentConsumersChanged =
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ContentTask.spawn(browser, {}, a11yConsumersChangedPromise);
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// Remove last reference to a11y service in content and force garbage
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// collection that should trigger shutdown.
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loadFrameScripts(browser, `accService = null; Components.utils.forceGC();`);
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await contentA11yShutdown;
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await contentConsumersChanged.then(data => Assert.deepEqual(data, {
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XPCOM: false, MainProcess: false, PlatformAPI: false
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}, "Accessibility service consumers in content are correct."));
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// Unsetting e10s related preferences.
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await unsetE10sPrefs();
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});
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});
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