Implemented support for closure return on EntityManager::transactional. Fixes DDC-1125

lib/Doctrine/ORM/EntityManager.php

@@ -203,13 +203,18 @@ class EntityManager implements ObjectManager
     public function transactional(Closure $func)
     {
         $this->conn->beginTransaction();
+        
         try {
-            $func($this);
+            $return = $func($this);
+            
             $this->flush();
             $this->conn->commit();
+            
+            return $return ?: true;
         } catch (Exception $e) {
             $this->close();
             $this->conn->rollback();
+            
             throw $e;
         }
     }

tests/Doctrine/Tests/ORM/EntityManagerTest.php

@@ -143,4 +143,16 @@ class EntityManagerTest extends \Doctrine\Tests\OrmTestCase
         $this->_em->close();
         $this->_em->$methodName(new \stdClass());
     }
+    
+    /**
+     * @group DDC-1125
+     */
+    public function testTransactionalAcceptsReturn()
+    {
+        $return = $this->_em->transactional(function ($em) {
+            return 'foo';
+        });
+        
+        $this->assertEquals('foo', $return);
+    }
 }