Add a functional test for the new router.

core/modules/system/lib/Drupal/system/Tests/Routing/RouterTest.php

+<?php
+
+namespace Drupal\system\Tests\Routing;
+
+use Drupal\Core\Database\Database;
+use Drupal\simpletest\WebTestBase;
+
+/**
+ * Functional class for the full integrated routing system.
+ */
+class RouterTest extends WebTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('block', 'router_test');
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Integrated Router tests',
+      'description' => 'Function Tests for the fully integrated routing system.',
+      'group' => 'Routing',
+    );
+  }
+
+  public function testCanRoute() {
+    $this->drupalGet('router_test/test1');
+    $this->assertRaw('test1', 'The correct string was returned because the route was successful.');
+  }
+
+}

core/modules/system/tests/modules/router_test/lib/Drupal/router_test/TestControllers.php

+<?php
+
+namespace Drupal\router_test;
+
+use Symfony\Component\HttpFoundation\Response;
+
+/**
+ * Description of TestControllers
+ */
+class TestControllers {
+
+  public function test1() {
+    return new Response('test1');
+  }
+
+}
+

core/modules/system/tests/modules/router_test/router_test.module

@@ -3,10 +3,12 @@
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 
-function router_test_router_info() {
+function router_test_route_info() {
   $collection = new RouteCollection();
 
-  $route = new Route('router_test/test1');
+  $route = new Route('router_test/test1', array(
+    '_controller' => '\Drupal\router_test\TestControllers::test1'
+  ));
   $collection->add('router_test_1', $route);
 
   return $collection;