MD Settings: checkbox: Support inverted when setting pref

chrome/test/data/webui/settings/settings_toggle_button_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 settings-toggle-button. */
 cr.define('settings_toggle_button', function() {
   function registerTests() {
     suite('SettingsToggleButton', function() {
       /**
        * Toggle button created before each test.
@@ skipping 46 matching lines @@
         testElement.checked = false;
         testElement.setAttribute('disabled', '');
         assertTrue(testElement.disabled);
         assertTrue(testElement.$.control.disabled);
 
         MockInteractions.tap(testElement.$.control);
         assertFalse(testElement.checked);
         assertFalse(testElement.$.control.checked);
       });
 
+      test('inverted', function() {
+        testElement.setAttribute('inverted', '');

[Dan Beam, 2017/03/01 00:27:00]

nit: testElement.inverted = true;

[stevenjb, 2017/03/01 00:35:13]

Done.

+        var pref = {
+          key: 'test',
+          type: chrome.settingsPrivate.PrefType.BOOLEAN,
+          value: true
+        };
+        testElement.set('pref', pref);

[Dan Beam, 2017/03/01 00:27:00]

nit:

testElement.set('pref', {
  key: 'test',
  type: chrome.settingsPrivate.PrefType.BOOLEAN,
  value: true
});

[stevenjb, 2017/03/01 00:35:13]

Done.

+
+        assertTrue(testElement.pref.value);
+        assertFalse(testElement.checked);
+
+        MockInteractions.tap(testElement.$.control);
+        assertFalse(testElement.pref.value);
+        assertTrue(testElement.checked);
+
+        MockInteractions.tap(testElement.$.control);
+        assertTrue(testElement.pref.value);
+        assertFalse(testElement.checked);
+      });
+
       test('numerical pref', function() {
         var prefNum = {
           key: 'test',
           type: chrome.settingsPrivate.PrefType.NUMBER,
           value: 1
         };
 
         testElement.set('pref', prefNum);
         assertTrue(testElement.checked);
 
@@ skipping 54 matching lines @@
         assertTrue(testElement.checked);
         assertEquals(1, prefNum.value);
       });
     });
   }
 
   return {
     registerTests: registerTests,
   };
 });