MD User Manager: Supervised user checkbox is always displaying

chrome/test/data/webui/md_user_manager/create_profile_tests.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.
 
 cr.define('user_manager.create_profile_tests', function() {
   /** @return {!CreateProfileElement} */
   function createElement() {
     PolymerTest.clearBody();
     var createProfileElement = document.createElement('create-profile');
     document.body.appendChild(createProfileElement);
@@ skipping 40 matching lines @@
         return browserProxy.whenCalled('getSignedInUsers').then(function() {
           assertEquals(1, createProfileElement.signedInUsers_.length);
           assertEquals('username',
                        createProfileElement.signedInUsers_[0].username);
           assertEquals('path/to/profile',
                        createProfileElement.signedInUsers_[0].profilePath);
 
           // The 'learn more' link is visible.
           assertTrue(!!createProfileElement.$$('#learn-more'));
 
-          // The dropdown menu is visible only when the checkbox is checked.
+          // The dropdown menu becomes visible when the checkbox is checked.
           assertFalse(!!createProfileElement.$$('paper-dropdown-menu'));
 
           // Simulate checking the checkbox.
           MockInteractions.tap(createProfileElement.$$('paper-checkbox'));
           Polymer.dom.flush();
 
           // The dropdown menu is visible and is populated with the sentinel
           // item as well as the signed in users.
           var dropdownMenu = createProfileElement.$$('paper-dropdown-menu');
           assertTrue(!!dropdownMenu);
@@ skipping 299 matching lines @@
         // Make sure DOM is up to date.
         Polymer.dom.flush();
       });
 
       teardown(function() { createProfileElement.remove(); });
 
       test('Handles no signed in users', function() {
         return browserProxy.whenCalled('getSignedInUsers').then(function() {
           assertEquals(0, createProfileElement.signedInUsers_.length);
 
-          // '#supervised-user-container' is not present in the DOM.
-          var container = createProfileElement.$$('#supervised-user-container');
-          assertFalse(!!container);
+          // Simulate checking the checkbox.
+          MockInteractions.tap(createProfileElement.$$('paper-checkbox'));
+          Polymer.dom.flush();
+
+          // The dropdown menu is not visible when there are no signed in users.
+          assertFalse(!!createProfileElement.$$('paper-dropdown-menu'));

[tommycli, 2016/05/02 19:10:13]

you will also need an

assertTrue(fooElement.hidden) test, since the above line only tests that the
element exists.

[Moe, 2016/05/02 20:34:57]

This line is asserting that the dropdown does NOT exist. which is the expected
behavior.

[tommycli, 2016/05/02 21:57:49]

Ah you're right. thanks

+
+          // Instead a message containing a link to the Help Center on how
+          // to sign in to Chrome is displaying.
+          assertTrue(!!createProfileElement.$$('#sign-in-to-chrome'));
         });
       });
 
       test('Create button is disabled', function() {
         assertTrue(createProfileElement.$.save.disabled);
       });
     });
   }
 
   return {
     registerTests: registerTests,
   };
 });