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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(async function () {
info("Creating a service");
// Create a11y service.
const [a11yInitObserver, a11yInit] = initAccService();
await a11yInitObserver;
let accService1 = Cc["@mozilla.org/accessibilityService;1"].getService(
Ci.nsIAccessibilityService
);
await a11yInit;
ok(accService1, "Service initialized");
// Add another reference to a11y service. This will not trigger
// 'a11y-init-or-shutdown' event
let accService2 = Cc["@mozilla.org/accessibilityService;1"].getService(
Ci.nsIAccessibilityService
);
ok(accService2, "Service initialized");
info("Removing all service references");
let canShutdown = false;
// This promise will resolve only if canShutdown flag is set to true. If
// 'a11y-init-or-shutdown' event with '0' flag comes before it can be shut
// down, the promise will reject.
const [a11yShutdownObserver, a11yShutdownPromise] = shutdownAccService();
await a11yShutdownObserver;
const a11yShutdown = new Promise((resolve, reject) =>
a11yShutdownPromise.then(flag =>
canShutdown
? resolve()
: reject("Accessible service was shut down incorrectly")
)
);
// Remove first a11y service reference.
accService1 = null;
ok(!accService1, "Service is removed");
// Force garbage collection that should not trigger shutdown because there is
// another reference.
forceGC();
// Have some breathing room when removing a11y service references.
await TestUtils.waitForTick();
// Now allow a11y service to shutdown.
canShutdown = true;
// Remove last a11y service reference.
accService2 = null;
ok(!accService2, "Service is removed");
// Force garbage collection that should trigger shutdown.
forceGC();
await a11yShutdown;
});
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