Support basic reading of focus for both desktop and tabs trees.

chrome/browser/resources/chromeos/chromevox2/cvox2/background/background.extjs

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Include test fixture.
-GEN_INCLUDE(['../../../chromevox/testing/chromevox_unittest_base.js']);
+GEN_INCLUDE(['../../../chromevox/testing/chromevox_e2e_test.js']);
 
 /**
  * Test fixture for cvox2.Background.
  * @constructor
- * @extends {ChromeVoxUnitTestBase}
+ * @extends {ChromeVoxE2ETest}
  */
 function BackgroundTest() {}
 
 BackgroundTest.prototype = {
-  __proto__: ChromeVoxUnitTestBase.prototype,
+  __proto__: ChromeVoxE2ETest.prototype,
 
   /** @override */
-  browsePreload: null,
-
-  /** @override */
-  testGenCppIncludes: function() {
-    GEN_BLOCK(function() {/*!
-#include "ash/accessibility_delegate.h"
-#include "base/bind.h"
-#include "base/callback.h"
-#include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
-#include "chrome/common/extensions/extension_constants.h"
-    */});
-  },
-
-  /** @override */
-  testGenPreamble: function() {
-    GEN_BLOCK(function() {/*!
-  if (chromeos::AccessibilityManager::Get()->IsSpokenFeedbackEnabled()) {
-    chromeos::AccessibilityManager::Get()->EnableSpokenFeedback(false,
-        ash::A11Y_NOTIFICATION_NONE);
-  }
-
-  base::Closure load_cb =
-      base::Bind(&chromeos::AccessibilityManager::EnableSpokenFeedback,
-          base::Unretained(chromeos::AccessibilityManager::Get()),
-          true,
-          ash::A11Y_NOTIFICATION_NONE);
-  WaitForExtension(extension_misc::kChromeVoxExtensionId, load_cb);
-    */});
+  setUp: function() {
+    this.mockTts = new MockTts();
+    cvox.ChromeVox.tts = this.mockTts;
   }
 };
 
-/** Tests ChromeVox classic is in this context. */
-TEST_F('BackgroundTest', 'ClassicNamespaces', function() {
+/**
+ * Mock tts class.
+ * @constructor
+ * @extends {cvox.TtsInterface}
+ */
+var MockTts = function() {
+};
+
+MockTts.prototype = {
+  /** Tracks all spoken text. @type {!Array.<string>} */
+  utterances: [],
+
+  /** @override */
+  speak: function(textString, queueMode, properties) {
+    this.utterances.push(textString);
+  },
+
+  /**
+   * Checks to see if a string was spoken.
+   * @param {string} textString The string to check.
+   * @return {boolean} True if the string was spoken (possibly as part of a
+   * larger utterance).
+   */
+  checkIfTextWasSpoken: function(textString) {
+    return this.utterances.some(function(t) {
+      return t.indexOf(textString) != -1;
+    });
+  }
+};
+
+/** Tests that ChromeVox classic is in this context. */
+SYNC_TEST_F('BackgroundTest', 'ClassicNamespaces', function() {
   assertEquals('object', typeof(cvox));
   assertEquals('function', typeof(cvox.ChromeVoxBackground));
 });
+
+/** Tests that ChromeVox next is in this context. */
+SYNC_TEST_F('BackgroundTest', 'NextNamespaces', function() {
+  assertEquals('object', typeof(cvox2));
+  assertEquals('function', typeof(cvox2.Background));
+});
+
+/** Tests that ChromeVox reads the desktop tree. */
+TEST_F('BackgroundTest', 'DesktopFocus', function() {
+  function findStatusTray(root) {
+    if (root.role == chrome.automation.RoleType.button &&
+        root.attributes.name == 'Status tray') {
+      return root;
+    }
+    for (var i = 0; i < root.children().length; i++) {
+      var found = findStatusTray(root.children()[i]);
+      if (found)
+        return found;
+    }
+    return null;
+  }
+
+  chrome.automation.getDesktop(function(root) {
+    var testButton = findStatusTray(root);
+    testButton.addEventListener(chrome.automation.EventType.focus,
+        function(e) {
+          var result =
+              cvox.ChromeVox.tts.checkIfTextWasSpoken('Status tray button');
+          testDone([result, '']);
+        },
+        true);
+    testButton.focus();
+  });
+});