    @Test
    public void testCreditCardGenerator(){

        for (int i=0;i<100;i++) {
            CreditCardGenerator creditCardGenerator = new CreditCardGenerator();
            String value = creditCardGenerator.generate();
            switch (creditCardGenerator.getType()){
                case "AMEX":
                    Assert.assertEquals(value.charAt(0),'3');
                    Assert.assertEquals(value.length(),15);
                    break;
                case "VISA":
                    Assert.assertEquals(value.charAt(0),'4');
                    Assert.assertEquals(value.length(),16);
                    break;
                case "MASTERCARD":
                    Assert.assertEquals(value.charAt(0),'5');
                    Assert.assertEquals(value.length(),16);
                    break;
                case "DISCOVER":
                    Assert.assertEquals(value.charAt(0),'6');
                    Assert.assertEquals(value.length(),16);
                    break;
                case "JCB":
                    Assert.assertEquals(value.charAt(0),'3');
                    Assert.assertEquals(value.charAt(1),'5');
                    Assert.assertEquals(value.length(),16);
                    break;
                default:
                    Assert.fail("Not a valid type");
            }
        }
    }