public void ShouldRecognizeGoodCustomers()
 {
     var sut = new CreditHistoryChecker();
     var isCreditWorthy = sut.CheckCreditHistory(2);
     Assert.That(isCreditWorthy, Is.True);
 }
 public void ShouldRecognizeCustomersWithBadHistory()
 {
     var sut = new CreditHistoryChecker();
     var isCreditWorthy = sut.CheckCreditHistory(20);
     Assert.That(isCreditWorthy, Is.False);
 }