public function setUp()
 {
     $pwd = dirname(__FILE__);
     $pathToFixture = sprintf('%s/Fixture/OffsetDateParserFixture.xml', $pwd);
     $xml = simplexml_load_file($pathToFixture);
     $pathToHeaderFixture = sprintf('%s/Fixture/OffsetDateParserHeaderFixture.xml', $pwd);
     $xmlHeader = simplexml_load_file($pathToHeaderFixture);
     $this->parser = new OffsetDateParser();
     $this->parser->setXmlField($xml);
     $this->parser->setXmlHeader($xmlHeader);
 }