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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(function* () {
// Making sure that the e10s is enabled on Windows for testing.
yield setE10sPrefs();
yield BrowserTestUtils.withNewTab({
gBrowser,
url: `data:text/html,
<html>
<head>
<meta charset="utf-8"/>
<title>Accessibility Test</title>
</head>
<body></body>
</html>`
}, function*(browser) {
info('Creating a service in parent and waiting for service to be created ' +
'in content');
// Create a11y service in the main process. This will trigger creating of
// the a11y service in parent as well.
let parentA11yInit = initPromise();
let contentA11yInit = initPromise(browser);
let accService = Cc['@mozilla.org/accessibilityService;1'].getService(
Ci.nsIAccessibilityService);
ok(accService, 'Service initialized in parent');
yield Promise.all([parentA11yInit, contentA11yInit]);
info('Adding additional reference to accessibility service in content ' +
'process');
// Add a new reference to the a11y service inside the content process.
loadFrameScripts(browser, `let accService = Components.classes[
'@mozilla.org/accessibilityService;1'].getService(
Components.interfaces.nsIAccessibilityService);`);
info('Shutting down a service in parent and making sure the one in ' +
'content stays alive');
let contentCanShutdown = false;
let parentA11yShutdown = shutdownPromise();
// This promise will resolve only if contentCanShutdown flag is set to true.
// If 'a11y-init-or-shutdown' event with '0' flag (in content) comes before
// it can be shut down, the promise will reject.
let contentA11yShutdown = new Promise((resolve, reject) =>
shutdownPromise(browser).then(flag => contentCanShutdown ?
resolve() : reject('Accessible service was shut down incorrectly')));
// Remove a11y service reference in the main process and force garbage
// collection. This should not trigger shutdown in content since a11y
// service is used by XPCOM.
accService = null;
ok(!accService, 'Service is removed in parent');
// Force garbage collection that should not trigger shutdown because there
// is a reference in a content process.
forceGC();
loadFrameScripts(browser, `Components.utils.forceGC();`);
yield parentA11yShutdown;
// Have some breathing room between a11y service shutdowns.
yield new Promise(resolve => executeSoon(resolve));
info('Removing a service in content');
// Now allow a11y service to shutdown in content.
contentCanShutdown = true;
// Remove last reference to a11y service in content and force garbage
// collection that should trigger shutdown.
loadFrameScripts(browser, `accService = null; Components.utils.forceGC();`);
yield contentA11yShutdown;
// Unsetting e10s related preferences.
yield unsetE10sPrefs();
});
});
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