Settings Router Refactor: Support dynamic parameters

chrome/test/data/webui/settings/cr_settings_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 the Polymer Settings tests. */
 
 /** @const {string} Path to source root. */
 var ROOT_PATH = '../../../../../';
 
 // Polymer BrowserTest fixture.
@@ skipping 664 matching lines @@
 
 TEST_F('CrSettingsNonExistentRouteTest', 'All', function() {
   suite('NonExistentRoutes', function() {
     test('redirect to basic', function() {
       assertEquals(settings.Route.BASIC, settings.getCurrentRoute());
       assertEquals('/', location.pathname);
     });
   });
   mocha.run();
 });
+
+/**
+ * @constructor
+ * @extends {SettingsPageBrowserTest}
+*/
+function CrSettingsRouteDynamicParametersTest() {}
+
+CrSettingsRouteDynamicParametersTest.prototype = {
+  __proto__: CrSettingsBrowserTest.prototype,
+
+  /** @override */
+  browsePreload: 'chrome://md-settings/people?guid=a%2Fb&foo=42',
+};
+
+TEST_F('CrSettingsRouteDynamicParametersTest', 'All', function() {
+  suite('DynamicParameters', function() {
+    test('get parameters from URL and navigation', function(done) {
+      assertEquals(settings.Route.PEOPLE, settings.getCurrentRoute());
+      assertEquals('a/b', settings.getQueryParameters().get('guid'));
+      assertEquals('42', settings.getQueryParameters().get('foo'));
+
+      var params = new URLSearchParams();
+      params.set('bar', 'b=z');
+      params.set('biz', '3');
+      settings.navigateTo(settings.Route.SYNC, params);
+      assertEquals(settings.Route.SYNC, settings.getCurrentRoute());
+      assertEquals('b=z', settings.getQueryParameters().get('bar'));
+      assertEquals('3', settings.getQueryParameters().get('biz'));
+      assertEquals('?bar=b%3Dz&biz=3', window.location.search);
+
+      window.addEventListener('popstate', function(event) {
+        assertEquals('/people', settings.getCurrentRoute().path);
+        assertEquals(settings.Route.PEOPLE, settings.getCurrentRoute());
+        assertEquals('a/b', settings.getQueryParameters().get('guid'));
+        assertEquals('42', settings.getQueryParameters().get('foo'));
+        done();
+      });
+      window.history.back();
+    });
+  });
+  mocha.run();
+});