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058dce8bba
# ignore-this-changeset Differential Revision: https://phabricator.services.mozilla.com/D35895 --HG-- extra : source : e786ed0773342d7c897007bb1be5a101945b894a
153 lines
5.0 KiB
JavaScript
153 lines
5.0 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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/* exported initPromise, shutdownPromise, waitForEvent, setE10sPrefs,
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unsetE10sPrefs, a11yConsumersChangedPromise */
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/**
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* Set e10s related preferences in the test environment.
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* @return {Promise} promise that resolves when preferences are set.
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*/
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function setE10sPrefs() {
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return new Promise(resolve =>
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SpecialPowers.pushPrefEnv(
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{
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set: [["browser.tabs.remote.autostart", true]],
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},
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resolve
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)
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);
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}
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/**
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* Unset e10s related preferences in the test environment.
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* @return {Promise} promise that resolves when preferences are unset.
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*/
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function unsetE10sPrefs() {
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return new Promise(resolve => {
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SpecialPowers.popPrefEnv(resolve);
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});
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}
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// Load the shared-head file first.
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/* import-globals-from shared-head.js */
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Services.scriptloader.loadSubScript(
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"chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js",
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this
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);
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/**
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* Returns a promise that resolves when 'a11y-consumers-changed' event is fired.
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* @return {Promise} event promise evaluating to event's data
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*/
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function a11yConsumersChangedPromise() {
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return new Promise(resolve => {
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let observe = (subject, topic, data) => {
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Services.obs.removeObserver(observe, "a11y-consumers-changed");
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resolve(JSON.parse(data));
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};
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Services.obs.addObserver(observe, "a11y-consumers-changed");
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});
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}
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/**
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* Returns a promise that resolves when 'a11y-init-or-shutdown' event is fired.
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* @return {Promise} event promise evaluating to event's data
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*/
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function a11yInitOrShutdownPromise() {
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return new Promise(resolve => {
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let observe = (subject, topic, data) => {
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Services.obs.removeObserver(observe, "a11y-init-or-shutdown");
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resolve(data);
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};
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Services.obs.addObserver(observe, "a11y-init-or-shutdown");
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});
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}
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/**
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* Returns a promise that resolves when 'a11y-init-or-shutdown' event is fired
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* in content.
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* @param {Object} browser current "tabbrowser" element
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* @return {Promise} event promise evaluating to event's data
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*/
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function contentA11yInitOrShutdownPromise(browser) {
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return ContentTask.spawn(browser, {}, a11yInitOrShutdownPromise);
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}
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/**
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* A helper function that maps 'a11y-init-or-shutdown' event to a promise that
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* resovles or rejects depending on whether accessibility service is expected to
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* be initialized or shut down.
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*/
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function promiseOK(promise, expected) {
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return promise.then(flag =>
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flag === expected ? Promise.resolve() : Promise.reject()
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);
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}
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/**
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* Checks and returns a promise that resolves when accessibility service is
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* initialized with the correct flag.
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* @param {?Object} contentBrowser optinal remove browser object that indicates
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* that accessibility service is expected to be
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* initialized in content process.
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* @return {Promise} promise that resolves when the accessibility
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* service initialized correctly.
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*/
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function initPromise(contentBrowser) {
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let a11yInitPromise = contentBrowser
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? contentA11yInitOrShutdownPromise(contentBrowser)
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: a11yInitOrShutdownPromise();
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return promiseOK(a11yInitPromise, "1").then(
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() => ok(true, "Service initialized correctly"),
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() => ok(false, "Service shutdown incorrectly")
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);
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}
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/**
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* Checks and returns a promise that resolves when accessibility service is
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* shut down with the correct flag.
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* @param {?Object} contentBrowser optinal remove browser object that indicates
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* that accessibility service is expected to be
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* shut down in content process.
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* @return {Promise} promise that resolves when the accessibility
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* service shuts down correctly.
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*/
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function shutdownPromise(contentBrowser) {
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let a11yShutdownPromise = contentBrowser
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? contentA11yInitOrShutdownPromise(contentBrowser)
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: a11yInitOrShutdownPromise();
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return promiseOK(a11yShutdownPromise, "0").then(
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() => ok(true, "Service shutdown correctly"),
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() => ok(false, "Service initialized incorrectly")
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);
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}
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/**
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* Simpler verions of waitForEvent defined in
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* accessible/tests/browser/events.js
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*/
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function waitForEvent(eventType, expectedId) {
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return new Promise(resolve => {
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let eventObserver = {
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observe(subject) {
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let event = subject.QueryInterface(Ci.nsIAccessibleEvent);
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let id;
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try {
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id = event.accessible.id;
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} catch (e) {
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// This can throw NS_ERROR_FAILURE.
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}
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if (event.eventType === eventType && id === expectedId) {
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Services.obs.removeObserver(this, "accessible-event");
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resolve(event);
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}
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},
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};
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Services.obs.addObserver(eventObserver, "accessible-event");
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});
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}
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