[Media Router] Assign each route a current cast mode if possible

chrome/test/data/webui/media_router/media_router_container_test_base.js

 // Copyright 2016 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 Provides basic utility functions and variables for
  * media-router-container tests.
  */
 
 cr.define('media_router_container_test_base', function() {
   function init(container) {
@@ skipping 18 matching lines @@
       for (var i = 0; i < elementIdList.length; i++)
         checkElementVisibleWithId(true, elementIdList[i]);
 
       for (var j = 0; j < hiddenCheckElementIdList.length; j++) {
         if (elementIdList.indexOf(hiddenCheckElementIdList[j]) == -1)
           checkElementVisibleWithId(false, hiddenCheckElementIdList[j]);
       }
     };
 
     /**
+     * Checks the visibility of an element. An element is considered visible if
+     * it exists and its |hidden| property is |false|.
+     *
+     * @param {boolean} visible Whether the element should be visible.
+     * @param {?Element} element The element to test.
+     * @param {?string} elementId Optional element id to display.
+     */
+    var checkElementVisible = function(visible, element, elementId) {
+      var elementVisible = !!element && !element.hidden &&
+          element.style.display != 'none';
+      assertEquals(visible, elementVisible, elementId);
+    };
+
+    /**
      * Checks the visibility of an element with |elementId| in |container|.
      * An element is considered visible if it exists and its |hidden| property
      * is |false|.
      *
      * @param {boolean} visible Whether the element should be visible.
      * @param {!string} elementId The id of the element to test.
      */
     var checkElementVisibleWithId = function(visible, elementId) {
       var element = container.$$('#' + elementId);
-      var elementVisible = !!element && !element.hidden &&
-          element.style.display != 'none';
-      assertEquals(visible, elementVisible, elementId);
+      checkElementVisible(visible, element);
     };
 
     /**
      * Checks whether |expected| and the text in the |element| are equal.
      *
      * @param {!string} expected Expected text.
      * @param {!Element} element Element whose text will be checked.
      */
     var checkElementText = function(expected, element) {
       assertEquals(expected.trim(), element.textContent.trim());
@@ skipping 103 matching lines @@
 
     /**
      * Search text that will match exactly one sink.
      * @type {!string}
      */
     var searchTextOne = 'sink 1';
 
     return {
       checkCurrentView: checkCurrentView,
       checkElementsVisibleWithId: checkElementsVisibleWithId,
+      checkElementVisible: checkElementVisible,
       checkElementVisibleWithId: checkElementVisibleWithId,
       checkElementText: checkElementText,
       fakeBlockingIssue: fakeBlockingIssue,
       fakeCastModeList: fakeCastModeList,
       fakeCastModeListWithNonDefaultModesOnly:
           fakeCastModeListWithNonDefaultModesOnly,
       fakeNonBlockingIssue: fakeNonBlockingIssue,
       fakeRouteList: fakeRouteList,
       fakeRouteListWithLocalRoutesOnly: fakeRouteListWithLocalRoutesOnly,
       fakeSinkList: fakeSinkList,
       searchTextAll: searchTextAll,
       searchTextNone: searchTextNone,
       searchTextOne: searchTextOne,
     };
   }
   return {init: init};
 });