public void ArgumentExceptionAsyncTest()
{
IDiscountCalculatorAsync discountCalculator = CreateDiscountCalculator();
Action actnull = () =>
discountCalculator.CalculateDiscountAsync(null).Wait();
actnull.Should().Throw <ArgumentNullException>();
}
public void CalculateAsyncTest()
{
// Arrange
IDiscountCalculatorAsync discountCalculator = CreateDiscountCalculator();
Order order = CreateOrderWith1Product("2019-10-18", 1000);
// Act
Func <Task <decimal> > act =
() => discountCalculator.CalculateDiscountAsync(order);
// Asserts
act.Should()
.CompleteWithin(500.Milliseconds())
.Which
.Should()
.Be(500);
}
