public function testSetGetLang()
 {
     $oLang = new oxLang();
     $oLang->setBaseLanguage(0);
     $oPayPalIPNRequestValidator = new oePayPalIPNPaymentValidator();
     $oPayPalIPNRequestValidator->setLang($oLang);
     $this->assertEquals($oLang, $oPayPalIPNRequestValidator->getLang(), 'Getter should return same as set in setter.');
 }