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Test Info: Warnings
- This test gets skipped with pattern: a11y_checks OR os == 'win' && verify && debug
- Manifest: accessible/tests/browser/browser.toml
/* 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
"use strict";
add_task(async function () {
await BrowserTestUtils.withNewTab(
{
gBrowser,
url: `data:text/html,
<html>
<head>
<meta charset="utf-8"/>
<title>Accessibility Test</title>
</head>
<body></body>
</html>`,
},
async function (browser) {
info(
"Creating a service in parent and waiting for service to be created " +
"in content"
);
await loadContentScripts(browser, {
script: "Common.sys.mjs",
symbol: "CommonUtils",
});
// Create a11y service in the main process. This will trigger creating of
// the a11y service in parent as well.
const [parentA11yInitObserver, parentA11yInit] = initAccService();
const [contentA11yInitObserver, contentA11yInit] =
initAccService(browser);
await Promise.all([parentA11yInitObserver, contentA11yInitObserver]);
let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
Ci.nsIAccessibilityService
);
ok(accService, "Service initialized in parent");
await 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.
await SpecialPowers.spawn(browser, [], () => {
content.CommonUtils.accService;
});
info(
"Trying to shut down a service in content and making sure it stays " +
"alive as it was started by parent"
);
let contentCanShutdown = false;
// 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.
const [contentA11yShutdownObserver, contentA11yShutdownPromise] =
shutdownAccService(browser);
await contentA11yShutdownObserver;
const contentA11yShutdown = new Promise((resolve, reject) =>
contentA11yShutdownPromise.then(() =>
contentCanShutdown
? resolve()
: reject("Accessible service was shut down incorrectly")
)
);
// Remove a11y service reference in content and force garbage collection.
// This should not trigger shutdown since a11y was originally initialized by
// the main process.
await SpecialPowers.spawn(browser, [], () => {
content.CommonUtils.clearAccService();
});
// Have some breathing room between a11y service shutdowns.
await TestUtils.waitForTick();
info("Removing a service in parent");
// Now allow a11y service to shutdown in content.
contentCanShutdown = true;
// Remove the a11y service reference in the main process.
const [parentA11yShutdownObserver, parentA11yShutdown] =
shutdownAccService();
await parentA11yShutdownObserver;
accService = null;
ok(!accService, "Service is removed in parent");
// Force garbage collection that should trigger shutdown in both parent and
// content.
forceGC();
await Promise.all([parentA11yShutdown, contentA11yShutdown]);
}
);
});