public function testGetBillcode()
{
$SofortLibBillcodeDetails = new SofortLibBillcodeDetails(self::$configkey);
$this->assertFalse($SofortLibBillcodeDetails->getBillcode());
$response = self::_getProperty('_response', $this->_classToTest);
$data_2_b_tested = '456789';
$data_structure = array('billcode' => array('@data' => $data_2_b_tested));
$response->setValue($SofortLibBillcodeDetails, $data_structure);
$this->assertEquals($data_2_b_tested, $SofortLibBillcodeDetails->getBillcode());
}
