browser_accessibility_simple.js

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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";

const PREF_ACCESSIBILITY_FORCE_DISABLED = "accessibility.force_disabled";

function checkAccessibilityState(accessibility, parentAccessibility, expected) {

  const { enabled } = accessibility;

  const { canBeDisabled, canBeEnabled } = parentAccessibility;

  is(enabled, expected.enabled, "Enabled state is correct.");

  is(canBeDisabled, expected.canBeDisabled, "canBeDisabled state is correct.");

  is(canBeEnabled, expected.canBeEnabled, "canBeEnabled state is correct.");

// Simple checks for the AccessibilityActor and AccessibleWalkerActor

add_task(async function () {

  const {

    walker: domWalker,

    target,

    accessibility,

    parentAccessibility,

    a11yWalker,

  } = await initAccessibilityFrontsForUrl(

    "data:text/html;charset=utf-8,<title>test</title><div></div>",

    { enableByDefault: false }

);

  ok(accessibility, "The AccessibilityFront was created");

  ok(accessibility.getWalker, "The getWalker method exists");

  ok(accessibility.getSimulator, "The getSimulator method exists");

  ok(accessibility.accessibleWalkerFront, "Accessible walker was initialized");

is(

    a11yWalker,

    accessibility.accessibleWalkerFront,

    "The AccessibleWalkerFront was returned"

);

  const a11ySimulator = accessibility.simulatorFront;

  ok(accessibility.simulatorFront, "Accessible simulator was initialized");

is(

    a11ySimulator,

    accessibility.simulatorFront,

    "The SimulatorFront was returned"

);

  checkAccessibilityState(accessibility, parentAccessibility, {

    enabled: false,

    canBeDisabled: true,

    canBeEnabled: true,

});

  info("Force disable accessibility service: updates canBeEnabled flag");

  let onEvent = parentAccessibility.once("can-be-enabled-change");

  Services.prefs.setIntPref(PREF_ACCESSIBILITY_FORCE_DISABLED, 1);

  await onEvent;

  checkAccessibilityState(accessibility, parentAccessibility, {

    enabled: false,

    canBeDisabled: true,

    canBeEnabled: false,

});

  info("Clear force disable accessibility service: updates canBeEnabled flag");

  onEvent = parentAccessibility.once("can-be-enabled-change");

  Services.prefs.clearUserPref(PREF_ACCESSIBILITY_FORCE_DISABLED);

  await onEvent;

  checkAccessibilityState(accessibility, parentAccessibility, {

    enabled: false,

    canBeDisabled: true,

    canBeEnabled: true,

});

  info("Initialize accessibility service");

  const initEvent = accessibility.once("init");

  await parentAccessibility.enable();

  await waitForA11yInit();

  await initEvent;

  checkAccessibilityState(accessibility, parentAccessibility, {

    enabled: true,

    canBeDisabled: true,

    canBeEnabled: true,

});

  const rootNode = await domWalker.getRootNode();

  const a11yDoc = await accessibility.accessibleWalkerFront.getAccessibleFor(

    rootNode

);

  ok(a11yDoc, "Accessible document actor is created");

  info("Shutdown accessibility service");

  const shutdownEvent = accessibility.once("shutdown");

  await waitForA11yShutdown(parentAccessibility);

  await shutdownEvent;

  checkAccessibilityState(accessibility, parentAccessibility, {

    enabled: false,

    canBeDisabled: true,

    canBeEnabled: true,

});

  await target.destroy();

  gBrowser.removeCurrentTab();

});