ReceiptValidator\iTunes\Response::getResultCode PHP Method

    public function getResultCode()
    {
        return $this->_code;
    }

 public function testValidReceipt()
 {
     $response = new Response(array('status' => 0, 'receipt' => array()));
     $this->assertTrue($response->isValid(), 'receipt must be valid');
     $this->assertEquals(0, $response->getResultCode(), 'receipt result code must match');
 }