[Form] simplified a test from previous merge

src/Symfony/Component/Form/Tests/Extension/Core/Type/FileTypeTest.php

@@ -15,20 +15,12 @@ use Symfony\Component\HttpFoundation\File\UploadedFile;
 
 class FileTypeTest extends TypeTestCase
 {
-
     public function testFormBuilderIfEntityHasFile()
     {
-        $entity = new \StdClass;
-        $entity->imageFile = $this->createUploadedFileMock('abcdef', 'original.jpg', true);
-
-        try {
-            $form = $this->factory->createBuilder('form', $entity)
-                ->add('imageFile', 'file')
-                ->getForm();
-            return;
-        } catch (\Symfony\Component\Form\Exception\FormException $e) {
-            $this->fail();
-        }
+        $this->factory->createBuilder('file')
+            ->getForm()
+            ->setData($this->createUploadedFileMock('abcdef', 'original.jpg', true))
+        ;
     }
 
     public function testDontPassValueToView()