public string ReceiptOneDefy(int amount)
        {
            var lineDiscount = new DiscountStrategyCalculator <LineViewModel>();

            lineDiscount.Configure()
            .When(line => line.Quantity >= 20 && line.Price >= 1000)
            .ApplyDiscount(line => line.Quantity * line.Price * 0.1m);
            var orderVm = new OrderViewModel(Substitute.For <IDiscountCalculator <OrderViewModel> >(), lineDiscount, new Order("Anywhere Bike Shop", "USD", 0.0725m));

            orderVm.AddLine(new Line(Defy, amount));
            var generator = new StringReceiptBuilder();

            return(generator.GenerateReceipt(orderVm));
        }
Beispiel #2
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        public void Should_GetDiscount_With_MinOperation_Mins_Discounts()
        {
            var sut = new DiscountStrategyCalculator <Order>(DiscountStrategyOperations.Min);

            sut.Configure()
            .When(_ => true)
            .ApplyDiscount(_ => 20m)
            .When(_ => true)
            .ApplyDiscount(_ => 60m);

            var discount = sut.GetDiscount(new Order(Arg.Any <string>(), Arg.Any <string>(), 0.0725m));

            Assert.That(discount, Is.EqualTo(20m));
        }
Beispiel #3
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        public void Should_AddCalculator_Compose_With_Itself()
        {
            var calculator      = new DiscountStrategyCalculator <Order>(DiscountStrategyOperations.Sum);
            var otherCalculator = new DiscountStrategyCalculator <Order>();

            calculator.Configure()
            .When(_ => true)
            .ApplyDiscount(_ => 42m);

            otherCalculator.Configure()
            .When(_ => true)
            .ApplyDiscount(_ => 42m);

            calculator.AddCalculator(otherCalculator);

            Assert.That(
                calculator.GetDiscount(new Order(Arg.Any <string>(), Arg.Any <string>(), 0.0725m)),
                Is.EqualTo(84m));
        }
Beispiel #4
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        public void Should_AddCalculator_Throw_ArgumentException_When_Cyclic_References()
        {
            var sut = new DiscountStrategyCalculator <Order>();

            Assert.Throws <ArgumentException>(() => sut.AddCalculator(sut));
        }