public void Should_Throw_ArgumentNullException_When_Adding_Null_DiscountCode()
{
var sut = new OrderViewModel(
Substitute.For <IDiscountCalculator <OrderViewModel> >(),
Substitute.For <IDiscountCalculator <LineViewModel> >(),
new Order(Arg.Any <string>(), Arg.Any <string>(), Arg.Any <decimal>()));
Assert.Throws <ArgumentNullException>(() => sut.AddDiscountCode(null));
Assert.Throws <ArgumentNullException>(() => sut.AddDiscountCode(string.Empty));
}
public void Should_Update_Prices_When_Adding_DiscountCode()
{
var orderDiscount = Substitute.For <IDiscountCalculator <OrderViewModel> >();
orderDiscount.GetDiscount(Arg.Any <OrderViewModel>()).Returns(info =>
{
var orderVm = info.ArgAt <OrderViewModel>(0);
if (orderVm.DiscountCodes != null && orderVm.DiscountCodes.Contains("test"))
{
return(orderVm.SubTotal * 0.1m);
}
return(0);
});
var sut = new OrderViewModel(orderDiscount, Substitute.For <IDiscountCalculator <LineViewModel> >(),
new Order(Arg.Any <string>(), Arg.Any <string>(), 0.0725m));
sut.AddLine(new Line(new Bike("brand", "model", 1000m), 1));
Assert.That(sut.Lines.Count, Is.EqualTo(1));
Assert.That(sut.SubTotal, Is.EqualTo(1000m));
Assert.That(sut.Tax, Is.EqualTo(1000m * 0.0725m));
Assert.That(sut.Total, Is.EqualTo(1000m * 0.0725m + 1000m));
sut.AddDiscountCode("test");
Assert.That(sut.SubTotal, Is.EqualTo(1000m));
Assert.That(sut.Tax, Is.EqualTo(1000m * 0.0725m));
Assert.That(sut.Total, Is.EqualTo(1000m * 0.0725m + 900m));
}