Merge branch '2.3'

Route/RoutesCacheWarmUp.php

@@ -40,7 +40,7 @@ class RoutesCacheWarmUp implements CacheWarmerInterface
      */
     public function isOptional()
     {
-        true;
+        return true;
     }
 
     /**

Tests/Route/RoutesCacheWarmUpTest.php

@@ -0,0 +1,35 @@
+<?php
+
+/*
+ * This file is part of the Sonata Project package.
+ *
+ * (c) Thomas Rabaix <thomas.rabaix@sonata-project.org>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Sonata\AdminBundle\Tests\Route;
+
+use Sonata\AdminBundle\Route\RoutesCacheWarmUp;
+
+class RoutesCacheWarmUpTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @var RoutesCacheWarmUp
+     */
+    protected $routesCacheWarmUp;
+
+    public function setUp()
+    {
+        $routesCache = $this->getMockBuilder('Sonata\AdminBundle\Route\RoutesCache')->disableOriginalConstructor()->getMock();
+        $pool        = $this->getMockBuilder('Sonata\AdminBundle\Admin\Pool')->disableOriginalConstructor()->getMock();
+
+        $this->routesCacheWarmUp = new RoutesCacheWarmUp($routesCache, $pool);
+    }
+
+    public function testIsOptional()
+    {
+        $this->assertTrue($this->routesCacheWarmUp->isOptional());
+    }
+}