public async Task TryCreateSaleAsync_WhenPassesValidation_ShouldReturnSuccessSalesProcessingResult()
{
//arrange
var mockBasketValidator = new Mock <IBasketValidator>();
mockBasketValidator.Setup(m => m.ValidateAsync(It.IsAny <IEnumerable <string> >()))
.Returns(Task.FromResult(Enumerable.Empty <ValidationError>()));
var mockBasketfactory = new Mock <IBasketFactory>();
mockBasketfactory.Setup(m => m.Get(It.IsAny <string[]>()))
.Returns(new Basket());
var mockSalesCalculator = new Mock <ISaleCalculator>();
mockSalesCalculator.Setup(m => m.CalculateAsync(It.IsAny <IBasket>()))
.ReturnsAsync(new SaleDetails());
var salesProcessingService = new SalesProcessingService(
mockBasketValidator.Object,
mockBasketfactory.Object,
mockSalesCalculator.Object);
//act
var result = await salesProcessingService.TryCreateSaleAsync(new string[] { });
//assert
Assert.IsTrue(result.Success);
mockBasketfactory.Verify(m => m.Get(It.IsAny <string[]>()), Times.Once);
mockSalesCalculator.Verify(m => m.CalculateAsync(It.IsAny <IBasket>()), Times.Once);
}
public async Task TryCreateSaleAsync_WhenValidationFails_ShouldReturnSalesProcessingResult()
{
//arrange
var mockBasketValidator = new Mock <IBasketValidator>();
mockBasketValidator.Setup(m => m.ValidateAsync(It.IsAny <IEnumerable <string> >()))
.Returns(Task.FromResult(new List <ValidationError> {
ValidationError.NoProductsSelected(),
ValidationError.OutOfStock("1234")
}.AsEnumerable()));
var mockBasketfactory = new Mock <IBasketFactory>();
var mockSalesCalculator = new Mock <ISaleCalculator>();
var salesProcessingService = new SalesProcessingService(
mockBasketValidator.Object,
mockBasketfactory.Object,
mockSalesCalculator.Object);
//act
var result = await salesProcessingService.TryCreateSaleAsync(new string[] { });
//assert
Assert.IsFalse(result.Success);
Assert.AreEqual(2, result.ValidationErrors.Count());
}