/**
  * Creates a dummy file to testing purposes
  *
  * @param $file
  *
  * @return DummyFile
  */
 protected function createDummyFile($file)
 {
     $file = new File($file);
     $dummyFile = $file->getFileInfo()->getBasename("." . $file->getExtension()) . time() . "." . $file->getExtension();
     $dummyFile = $this->getParameter("kernel.cache_dir") . "/" . $dummyFile;
     copy($file->getPathname(), $dummyFile);
     return new DummyFile($dummyFile);
 }