public function setUp()
{
$this->card = new CreditCard();
$this->card->setNumber('4111111111111111');
$this->card->setFirstName('Example');
$this->card->setLastName('Customer');
$this->card->setExpiryMonth('4');
$this->card->setExpiryYear(gmdate('Y') + 2);
$this->card->setCvv('123');
}