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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';
/* exported initPromise, shutdownPromise,
setE10sPrefs, unsetE10sPrefs, forceGC */
/**
* Set e10s related preferences in the test environment.
* @return {Promise} promise that resolves when preferences are set.
*/
function setE10sPrefs() {
return new Promise(resolve =>
SpecialPowers.pushPrefEnv({
set: [
['browser.tabs.remote.autostart', true],
['browser.tabs.remote.force-enable', true],
['extensions.e10sBlocksEnabling', false]
]
}, resolve));
}
/**
* Unset e10s related preferences in the test environment.
* @return {Promise} promise that resolves when preferences are unset.
*/
function unsetE10sPrefs() {
return new Promise(resolve => {
SpecialPowers.popPrefEnv(resolve);
});
}
// Load the shared-head file first.
Services.scriptloader.loadSubScript(
'chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js',
this);
/**
* Returns a promise that resolves when 'a11y-init-or-shutdown' event is fired.
* @return {Promise} event promise evaluating to event's data
*/
function a11yInitOrShutdownPromise() {
return new Promise(resolve => {
let observe = (subject, topic, data) => {
Services.obs.removeObserver(observe, 'a11y-init-or-shutdown');
resolve(data);
};
Services.obs.addObserver(observe, 'a11y-init-or-shutdown', false);
});
}
/**
* Returns a promise that resolves when 'a11y-init-or-shutdown' event is fired
* in content.
* @param {Object} browser current "tabbrowser" element
* @return {Promise} event promise evaluating to event's data
*/
function contentA11yInitOrShutdownPromise(browser) {
return ContentTask.spawn(browser, {}, a11yInitOrShutdownPromise);
}
/**
* A helper function that maps 'a11y-init-or-shutdown' event to a promise that
* resovles or rejects depending on whether accessibility service is expected to
* be initialized or shut down.
*/
function promiseOK(promise, expected) {
return promise.then(flag =>
flag === expected ? Promise.resolve() : Promise.reject());
}
/**
* Checks and returns a promise that resolves when accessibility service is
* initialized with the correct flag.
* @param {?Object} contentBrowser optinal remove browser object that indicates
* that accessibility service is expected to be
* initialized in content process.
* @return {Promise} promise that resolves when the accessibility
* service initialized correctly.
*/
function initPromise(contentBrowser) {
let a11yInitPromise = contentBrowser ?
contentA11yInitOrShutdownPromise(contentBrowser) :
a11yInitOrShutdownPromise();
return promiseOK(a11yInitPromise, '1').then(
() => ok(true, 'Service initialized correctly'),
() => ok(false, 'Service shutdown incorrectly'));
}
/**
* Checks and returns a promise that resolves when accessibility service is
* shut down with the correct flag.
* @param {?Object} contentBrowser optinal remove browser object that indicates
* that accessibility service is expected to be
* shut down in content process.
* @return {Promise} promise that resolves when the accessibility
* service shuts down correctly.
*/
function shutdownPromise(contentBrowser) {
let a11yShutdownPromise = contentBrowser ?
contentA11yInitOrShutdownPromise(contentBrowser) :
a11yInitOrShutdownPromise();
return promiseOK(a11yShutdownPromise, '0').then(
() => ok(true, 'Service shutdown correctly'),
() => ok(false, 'Service initialized incorrectly'));
}
/**
* Force garbage collection.
*/
function forceGC() {
Cu.forceCC();
Cu.forceGC();
}
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