public function testShouldSetEmptyUploadedFilesToNull() {
$bag = new FileBag(array(
'file' => array(
'name' => '',
'type' => '',
'tmp_name' => '',
'error' => UPLOAD_ERR_NO_FILE,
'size' => 0,
),
));
$this
->assertNull($bag
->get('file'));
}