public function testPrepareResponseSimpleXml()
    {
        $dummy = new Dummy();
        $body = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<person>
  <firstname>foo</firstname>
  <lastname>bar</lastname>
</person>
';
        $response = $this->getTestHeaders() . $body;
        $length = strlen($this->getTestHeaders());
        $options = array('simple_xml' => true);
        $result = $dummy->prepareResponse($options, $response, $length);
        $this->assertInstanceOf('\\SimpleXMLElement', $result);
        $this->assertEquals('foo', $result->firstname);
    }