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Test Info: Warnings
- This test gets skipped with pattern: a11y_checks
- 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);
let [contentConsumersChangedObserver, contentConsumersChanged] =
accConsumersChanged(browser);
await Promise.all([
parentA11yInitObserver,
contentA11yInitObserver,
contentConsumersChangedObserver,
]);
let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
Ci.nsIAccessibilityService
);
ok(accService, "Service initialized in parent");
await Promise.all([parentA11yInit, contentA11yInit]);
await contentConsumersChanged.then(data =>
Assert.deepEqual(
data,
{
XPCOM: false,
MainProcess: true,
PlatformAPI: false,
},
"Accessibility service consumers in content are correct."
)
);
info(
"Adding additional reference to accessibility service in content " +
"process"
);
[contentConsumersChangedObserver, contentConsumersChanged] =
accConsumersChanged(browser);
await contentConsumersChangedObserver;
// Add a new reference to the a11y service inside the content process.
await SpecialPowers.spawn(browser, [], () => {
content.CommonUtils.accService;
});
await contentConsumersChanged.then(data =>
Assert.deepEqual(
data,
{
XPCOM: true,
MainProcess: true,
PlatformAPI: false,
},
"Accessibility service consumers in content are correct."
)
);
const contentConsumers = await SpecialPowers.spawn(browser, [], () =>
content.CommonUtils.accService.getConsumers()
);
Assert.deepEqual(
JSON.parse(contentConsumers),
{
XPCOM: true,
MainProcess: true,
PlatformAPI: false,
},
"Accessibility service consumers in parent are correct."
);
info(
"Shutting down a service in parent and making sure the one in " +
"content stays alive"
);
let contentCanShutdown = false;
const [parentA11yShutdownObserver, parentA11yShutdown] =
shutdownAccService();
[contentConsumersChangedObserver, contentConsumersChanged] =
accConsumersChanged(browser);
// 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);
const contentA11yShutdown = new Promise((resolve, reject) =>
contentA11yShutdownPromise.then(() =>
contentCanShutdown
? resolve()
: reject("Accessible service was shut down incorrectly")
)
);
await Promise.all([
parentA11yShutdownObserver,
contentA11yShutdownObserver,
contentConsumersChangedObserver,
]);
// 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();
await SpecialPowers.spawn(browser, [], () => {
SpecialPowers.Cu.forceGC();
});
await parentA11yShutdown;
await contentConsumersChanged.then(data =>
Assert.deepEqual(
data,
{
XPCOM: true,
MainProcess: false,
PlatformAPI: false,
},
"Accessibility service consumers in content are correct."
)
);
// Have some breathing room between a11y service shutdowns.
await TestUtils.waitForTick();
info("Removing a service in content");
// Now allow a11y service to shutdown in content.
contentCanShutdown = true;
[contentConsumersChangedObserver, contentConsumersChanged] =
accConsumersChanged(browser);
await contentConsumersChangedObserver;
// Remove last reference to a11y service in content and force garbage
// collection that should trigger shutdown.
await SpecialPowers.spawn(browser, [], () => {
content.CommonUtils.clearAccService();
});
await contentA11yShutdown;
await contentConsumersChanged.then(data =>
Assert.deepEqual(
data,
{
XPCOM: false,
MainProcess: false,
PlatformAPI: false,
},
"Accessibility service consumers in content are correct."
)
);
}
);
});