/**
  * @param string               $expected
  * @param AbstractStreamWriter $actual
  * @param string               $message
  */
 public static function assertContentsEquals($expected, $actual, $message = '')
 {
     $stream = $actual->getStream();
     rewind($stream);
     $actual = stream_get_contents($stream);
     self::assertEquals($expected, $actual, $message);
 }