MD Settings: Add "Auto Open" setting to Downloads page UI.

chrome/test/data/webui/settings/downloads_page_test.js

+// Copyright 2017 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.
+
+/**
+ * @constructor
+ * @implements {settings.DownloadsBrowserProxy}
+ * @extends {settings.TestBrowserProxy}
+ */
+var TestDownloadsBrowserProxy = function() {
+  settings.TestBrowserProxy.call(this, [
+    'initializeDownloads',
+    'selectDownloadLocation',
+    'resetAutoOpenFileTypes',
+  ]);
+};
+
+TestDownloadsBrowserProxy.prototype = {
+  __proto__: settings.TestBrowserProxy.prototype,
+
+  /** @override */
+  initializeDownloads: function() {
+    this.methodCalled('initializeDownloads');
+  },
+
+  /** @override */
+  selectDownloadLocation: function() {
+    this.methodCalled('selectDownloadLocation');
+  },
+
+  /** @override */
+  resetAutoOpenFileTypes: function() {
+    this.methodCalled('resetAutoOpenFileTypes');
+  },
+};
+
+var downloadsPage = null;
+
+/** @type {?TestDownloadsBrowserProxy} */
+var DownloadsBrowserProxy = null;
+
+suite('DownloadsHandler', function() {
+  setup(function() {
+    DownloadsBrowserProxy = new TestDownloadsBrowserProxy();
+    settings.DownloadsBrowserProxyImpl.instance_ = DownloadsBrowserProxy;
+
+    PolymerTest.clearBody();
+
+    downloadsPage = document.createElement('settings-downloads-page');
+    document.body.appendChild(downloadsPage);
+
+    // Page element must call 'initializeDownloads' upon attachment to the DOM.
+    return DownloadsBrowserProxy.whenCalled('initializeDownloads');
+  });
+
+  teardown(function() {
+    downloadsPage.remove();
+  });
+
+  test('select downloads location', function() {
+    var button = downloadsPage.$$('#changeDownloadsPath');
+    assertTrue(!!button);
+    MockInteractions.tap(button);
+    return DownloadsBrowserProxy.whenCalled('selectDownloadLocation');
+  });
+
+  test('openAdvancedDownloadsettings', function() {
+    var button = downloadsPage.$$('#resetAutoOpenFileTypes');
+    assertTrue(!button);
+
+    cr.webUIListenerCallback('auto-open-downloads-changed', true);
+    Polymer.dom.flush();
+    var button = downloadsPage.$$('#resetAutoOpenFileTypes');
+    assertTrue(!!button);
+
+    MockInteractions.tap(button);
+    return DownloadsBrowserProxy.whenCalled('resetAutoOpenFileTypes')
+        .then(function() {
+          cr.webUIListenerCallback('auto-open-downloads-changed', false);
+          Polymer.dom.flush();
+          var button = downloadsPage.$$('#resetAutoOpenFileTypes');
+          assertTrue(!button);
+        });
+  });
+});