Add tests for braille commands.

chrome/browser/resources/chromeos/chromevox/host/chrome/braille.js

 // 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.
 
 /**
  * @fileoverview Bridge that sends Braille messages from content scripts or
  * other pages to the main background page.
  *
  */
 
 goog.provide('cvox.ChromeBraille');
 
-goog.require('cvox.AbstractBraille');
+goog.require('cvox.BrailleInterface');
 goog.require('cvox.BrailleKeyEvent');
 goog.require('cvox.ChromeVoxUserCommands');
 goog.require('cvox.HostFactory');
 
 
 /**
  * @constructor
- * @extends {cvox.AbstractBraille}
+ * @implements {cvox.BrailleInterface}
  */
 cvox.ChromeBraille = function() {
-  goog.base(this);
-  /**
-   * @type {function(!cvox.BrailleKeyEvent, cvox.NavBraille)}
-   * @private
-   */
-  this.commandListener_ = this.defaultCommandListener_;
   /**
    * @type {cvox.NavBraille}
    * @private
    */
   this.lastContent_ = null;
   /**
    * @type {string}
    * @private
    */
   this.lastContentId_ = '';
@@ skipping 10 matching lines @@
     // Don't process the event if this document isn't focused or focus lies in
     // a descendant.
     if (!cvox.ChromeVox.documentHasFocus()) {
       return;
     }
     if (msg['message'] == 'BRAILLE' && msg['args']) {
       var content = null;
       if (msg['contentId'] == this.lastContentId_) {
         content = this.lastContent_;
       }
-      this.commandListener_(msg['args'], content);
+      this.onKeyEvent_(msg['args'], content);
     }
   }, this));
 };
-goog.inherits(cvox.ChromeBraille, cvox.AbstractBraille);
 
 
 /** @override */
 cvox.ChromeBraille.prototype.write = function(params) {
   this.lastContent_ = params;
   this.updateLastContentId_();
   var outParams = params.toJson();
 
   var message = {'target': 'BRAILLE',
                  'action': 'write',
                  'params': outParams,
                  'contentId' : this.lastContentId_};
 
   cvox.ExtensionBridge.send(message);
 };
 
 
 /** @private */
 cvox.ChromeBraille.prototype.updateLastContentId_ = function() {
   this.lastContentId_ = cvox.ExtensionBridge.uniqueId() + '.' +
       this.nextLocalId_++;
 };
 
 
-/** @override */
-cvox.ChromeBraille.prototype.setCommandListener = function(func) {
-  this.commandListener_ = func;
-};
-
-
 /**
  * Dispatches braille input commands.
  * @param {!cvox.BrailleKeyEvent} brailleEvt The braille key event.
  * @param {cvox.NavBraille} content display content when command was issued,
  *                                  if available.
  * @private
  */
-cvox.ChromeBraille.prototype.defaultCommandListener_ = function(brailleEvt,
+cvox.ChromeBraille.prototype.onKeyEvent_ = function(brailleEvt,
                                                                 content) {
   var command = cvox.ChromeVoxUserCommands.commands[brailleEvt.command];
   if (command) {
     command({event: brailleEvt, content: content});
   } else {
     console.error('Unknown braille command: ' + JSON.stringify(brailleEvt));
   }
 };
 
 
+/**
+ * Overrides the key event handler
+ * @param {function(!cvox.BrailleKeyEvent, cvox.NavBraille):void} listener
+ */
+cvox.ChromeBraille.prototype.setKeyEventHandlerForTest = function(listener) {
+  this.onKeyEvent_ = listener;
+};
+
+
 /** Export platform constructor. */
 cvox.HostFactory.brailleConstructor = cvox.ChromeBraille;