public async Task Mediatr_test_success()
{
//Assemble
var _mediatorMock = new Mock <IMediator>();
var _mockCmd = new Mock <GeneratePaymentCmd>();
var FirstName = "JOHN";
var LastName = "DOE";
var AnualSalary = 60050;
var PaymentPeriod = "1March-31March";
var Super = "9";
var ExpectedIncomeTax = 922;
//Arrange
var fakeResult = new PaymentDTO()
{
IncomeTax = ExpectedIncomeTax
};
var mockCmd = new GeneratePaymentCmd(FirstName, LastName, AnualSalary, PaymentPeriod, Super);
_mediatorMock.Setup(x => x.Send(It.IsAny <GeneratePaymentCmd>(), default(System.Threading.CancellationToken)))
.Returns(Task.FromResult(fakeResult));
//Act
var payController = new PaymentController(_mediatorMock.Object);
var actionResult = await payController.GeneratePaymentAsync(mockCmd);
//Assert
Assert.AreEqual(actionResult.Value.IncomeTax, ExpectedIncomeTax);
}