[Media Router WebUI] Handle header height changes.

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

 // Copyright 2015 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 Suite of tests for media-router-header. */
 cr.define('media_router_header', function() {
   function registerTests() {
     suite('MediaRouterHeader', function() {
       /**
        * Media Router Header created before each test.
@@ skipping 130 matching lines @@
         header.view = media_router.MediaRouterView.FILTER;
         MockInteractions.tap(header.$['header-text']);
         header.view = media_router.MediaRouterView.ISSUE;
         MockInteractions.tap(header.$['header-text']);
         header.view = media_router.MediaRouterView.ROUTE_DETAILS;
         MockInteractions.tap(header.$['header-text']);
         done();
       });
 
       // Tests for 'header-height-changed' event firing when the header changes
-      // if email is shown.
+      // and the email is shown.
       test('header height changed with email shown', function(done) {
         header.addEventListener('header-height-changed', function() {
+          assertEquals(header.headerWithEmailHeight_, header.offsetHeight);
           done();
         });
         header.userEmail = 'user@example.com';
         header.showEmail = true;
       });
 
+      // Test for 'header-height-changed' event firing when the header changes
+      // and the email is not shown.
+      test('header height changed without email shown', function(done) {
+        header.userEmail = 'user@example.com';
+        header.showEmail = true;
+        setTimeout(function() {
+          header.addEventListener('header-height-changed', function() {
+            assertEquals(header.headerWithoutEmailHeight_, header.offsetHeight);
+            done();
+          });
+          header.showEmail = false;
+        });
+      });
+
       // Tests the |computeArrowDropIcon_| function.
       test('compute arrow drop icon', function() {
         assertEquals('arrow-drop-up',
             header.computeArrowDropIcon_(
                 media_router.MediaRouterView.CAST_MODE_LIST));
         assertEquals('arrow-drop-down',
             header.computeArrowDropIcon_(
                 media_router.MediaRouterView.FILTER));
         assertEquals('arrow-drop-down',
             header.computeArrowDropIcon_(
@@ skipping 60 matching lines @@
           done();
         });
       });
     });
   }
 
   return {
     registerTests: registerTests,
   };
 });