[TestCase(100)] // Should fail
public void GivenAnInvoiceCalculator_WithInvalidAmount_CalculateShouldThrowException(decimal subtotal)
{
// Arrange:
var someInvoiceCalculator = new InvoiceTotal.InvoiceCalculator();
// Act & Assert:
Assert.Throws <ArgumentException>(() => someInvoiceCalculator.Calculate(subtotal));
}
[TestCase(100, 25, 75)] // Should pass
public void GivenAnInvoiceCalculator_Calculate_CalculatesCorrectly(decimal subtotal,
decimal expDiscountedAmount, decimal expInvoiceTotal)
{
// Arrange:
var someInvoiceCalculator = new InvoiceTotal.InvoiceCalculator();
// Act:
someInvoiceCalculator.Calculate(subtotal);
// Assert:
Assert.AreEqual(someInvoiceCalculator.discountedAmount, expDiscountedAmount, $"The expected discounted amount did not match: {someInvoiceCalculator.discountedAmount}.");
Assert.AreEqual(someInvoiceCalculator.invoiceTotal, expInvoiceTotal, $"The expected invoice amount did not match: {someInvoiceCalculator.invoiceTotal}.");
}
public void GivenAnInvoiceCalculator_Reset_SetsAllValuesToZero()
{
//Arrange:
var someInvoiceCalculator = new InvoiceTotal.InvoiceCalculator();
someInvoiceCalculator.discountedAmount = 200;
someInvoiceCalculator.invoiceTotal = 3;
//Act:
someInvoiceCalculator.Reset();
// Assert:
Assert.AreEqual(someInvoiceCalculator.discountedAmount, 0);
Assert.AreEqual(someInvoiceCalculator.invoiceTotal, 0);
}