[MD settings] adding a test for Appearance settings

chrome/test/data/webui/settings/appearance_browsertest.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 Runs Polymer Appearance Settings elements. */
+
+GEN_INCLUDE(['settings_page_browsertest.js']);
+
+/**
+ * Test Polymer Appearance Settings elements.
+ * @constructor
+ * @extends {SettingsPageBrowserTest}
+*/
+function AppearanceSettingsBrowserTest() {}
+
+AppearanceSettingsBrowserTest.prototype = {
+  __proto__: SettingsPageBrowserTest.prototype,
+
+  /** @return {string} */
+  appearancePage: function(selector) {
+    var section = this.getSection(this.getPage('basic'), 'appearance');
+    assertTrue(!!section);
+    var appearance = section.querySelector('settings-appearance-page');
+    assertTrue(!!appearance);
+    var result = appearance.$$(selector);
+    assertTrue(!!result);
+    return result;
+  },
+};
+
+TEST_F('AppearanceSettingsBrowserTest', 'uiTests', function() {
+  var self = this;
+  suite('AppearanceHandler', function() {
+    test('font settings', function() {
+      var fontSize = self.appearancePage(
+          '#defaultFontSize').$$('[class=iron-selected]');
+      assertEquals('Medium', fontSize.textContent);
+    });
+
+    test('home button', function() {
+      var homeButton = self.appearancePage('#showHomeButton');
+      assertEquals('false', homeButton.getAttribute('aria-pressed'));
+    });
+  });
+  mocha.run();
+});