public async Task Handler_GivenValidRequest_ShouldStorePaymentDetails()
{
// Arrange
var paymentId = Guid.NewGuid();
var bankClientMock = new Mock <IBankClient>();
bankClientMock.Setup(x => x.ProcessPayment(It.IsAny <int>(), It.IsAny <string>(),
It.IsAny <string>(), It.IsAny <string>(), It.IsAny <string>(),
It.IsAny <decimal>(), It.IsAny <string>()))
.Returns(new PaymentResult
{
Status = "Success",
PaymentId = paymentId
});
var bankClientFactoryMock = new Mock <IBankClientFactory>();
bankClientFactoryMock.Setup(x => x.Create(It.IsAny <string>()))
.Returns(bankClientMock.Object);
var sut = new CreatePaymentCommand.Handler(DbContext, bankClientFactoryMock.Object);
// Act
await sut.Handle(Command, CancellationToken.None);
// Assert
var entity = await DbContext.Payments.SingleOrDefaultAsync(x => x.Id == paymentId);
entity.ShouldNotBeNull();
}
public async Task Handler_GivenValidRequest_ShouldUseBankClientToProcessPayment()
{
// Arrange
var bankClientMock = new Mock <IBankClient>();
bankClientMock.Setup(x => x.ProcessPayment(It.IsAny <int>(), It.IsAny <string>(),
It.IsAny <string>(), It.IsAny <string>(), It.IsAny <string>(),
It.IsAny <decimal>(), It.IsAny <string>()))
.Returns(new PaymentResult
{
Status = "Success",
PaymentId = Guid.NewGuid()
});
var bankClientFactoryMock = new Mock <IBankClientFactory>();
bankClientFactoryMock.Setup(x => x.Create(It.IsAny <string>()))
.Returns(bankClientMock.Object);
var sut = new CreatePaymentCommand.Handler(DbContext, bankClientFactoryMock.Object);
// Act
await sut.Handle(Command, CancellationToken.None);
// Assert
bankClientMock.Verify(x => x.ProcessPayment(It.IsAny <int>(), It.IsAny <string>(),
It.IsAny <string>(), It.IsAny <string>(), It.IsAny <string>(),
It.IsAny <decimal>(), It.IsAny <string>()),
Times.Once);
}
public async Task CreatePayment_GivenInvalidInput_ShouldThrowAValidationException()
{
var command = new CreatePaymentCommand();
var sut = new CreatePaymentCommand.Handler(Context);
await sut.Invoking(async h => await h.Handle(command, CancellationToken.None))
.Should().ThrowAsync <ValidationException>();
}
public async Task Handler_WhenBankReturnsError_ShouldRaisePaymentNotAcceptedException()
{
// Arrange
var bankClientMock = new Mock <IBankClient>();
bankClientMock.Setup(x => x.ProcessPayment(It.IsAny <int>(), It.IsAny <string>(),
It.IsAny <string>(), It.IsAny <string>(), It.IsAny <string>(),
It.IsAny <decimal>(), It.IsAny <string>()))
.Returns(new PaymentResult
{
Status = "Card number invalid"
});
var bankClientFactoryMock = new Mock <IBankClientFactory>();
bankClientFactoryMock.Setup(x => x.Create(It.IsAny <string>()))
.Returns(bankClientMock.Object);
var sut = new CreatePaymentCommand.Handler(DbContext, bankClientFactoryMock.Object);
// Act & Assert
await Should.ThrowAsync <PaymentNotAcceptedException>(() =>
sut.Handle(Command, CancellationToken.None));
}
public async Task CreatePayment_GivenValidInput_ShouldSaveAPayment()
{
var command = new CreatePaymentCommand
{
MerchantId = 1,
CardHolderName = "Jake Ryu",
CardNumber = "1111-2222-3333-4444",
CardExpiryDate = "05/24",
Cvv = "978",
Amount = 150
};
var sut = new CreatePaymentCommand.Handler(Context);
await sut.Handle(command, CancellationToken.None);
var payment = await Context.Payments.FirstAsync();
payment.MerchantId.Should().Be(1);
payment.CardHolderName.Should().Be("Jake Ryu");
payment.CardNumber.OriginalValue.Should().Be("1111-2222-3333-4444");
payment.CardExpiryDate.Value.Should().Be(new DateTime(2024, 5, 31));
payment.Cvv.Should().Be("978");
payment.Amount.Should().Be(150);
}
