public void OverPayment()
{
Assert.Equal(0, PaymentApplicator.GetPayment(20, 0));
Assert.Equal(9, PaymentApplicator.GetPayment(20, 9));
Assert.Equal(10, PaymentApplicator.GetPayment(20, 10));
Assert.Equal(11, PaymentApplicator.GetPayment(20, 11));
}
public void Invoice_Date_Is_Used_When_Present_And_More_Recent()
{
Assert.Equal("2021-01-02", PaymentApplicator.GetPaymentDate("2021-01-01", "2021-01-02"));
Assert.Equal("2021-01-01", PaymentApplicator.GetPaymentDate("2021-01-01", "2020-12-31"));
Assert.Equal("2021-01-01", PaymentApplicator.GetPaymentDate("2021-01-01", null));
Assert.Equal("2021-01-01", PaymentApplicator.GetPaymentDate("2021-01-01", string.Empty));
}
public void NoInvoice()
{
Assert.Equal(10, PaymentApplicator.GetPayment(10, null));
}
public void UnderPayment()
{
Assert.Equal(5, PaymentApplicator.GetPayment(5, 10));
}
public void ExactPayment()
{
Assert.Equal(10, PaymentApplicator.GetPayment(10, 10));
}
