Omnipay\Common\CreditCard::getBillingCity PHP Method

    public function getBillingCity()
    {
        return $this->getParameter('billingCity');
    }

 public function testCity()
 {
     $this->card->setCity('Quahog');
     $this->assertEquals('Quahog', $this->card->getCity());
     $this->assertEquals('Quahog', $this->card->getBillingCity());
     $this->assertEquals('Quahog', $this->card->getShippingCity());
 }