XUnit test examples

public class XXXControllerTest
{
	// all mocks and stubs
	private Mock<IXXXService> _serviceMock;
	
	// controller under test 
	private XXXController _controller;
	
	public XXXControllerTest() 
	{
		_serviceMock = new Mock<IXXXService>();
		_controller = new XXXController(_serviceMock.Object);
	}
	
	[Fact]
	public async Task CallXXX_ShouldCall_Service()
	{
	// ARRANGE
	
	// mock header
	var httpContext = new DefaultHttpContext();
	httpContext.Request.Headers["someHeader"] = "my-mocked-value";
	_controller.ControllerContext = new ControllerContext
	{
		HttpContext = httpContext
	};
	
	// mock request
	string mockedValue = "someInputValueTo_serviceMock";
	string mockedResponse = "someResponseValueFrom_serviceMock";
	_serviceMock.Setup(mock => mock.SomeMethodCall(mockedValue)).ReturnsAsync(mockedResponse);
	
	// ACT
	var response = await _controller.CallSomething(mockedValue) as OkObjectResult;
	
	// ASSERT
	response.Should().NotBeNull();
	response.StatusCode.Should().Be(200);
	response.Value.Should().BeEquivalentTo(mockedResponse);
	}
}

public class XXXServiceTest
{
	// all mocks and stubs
	private Mock<IXXXDependency> _dependency;

	// service under test
	private XXXService _serviceMock;

	public XXXServiceTest()
	{
		_dependency = new Mock<IXXXDependency>();
		_serviceMock = new XXXService(_dependency.Object);
	}

	[Fact]
	public async Task ProcessXXX_CaseXXX_ShouldReturnOkay()
	{
		// ARRANGE
		string paramX = "something";
		string responseX = "some response";
		_serviceMock.Setup(mock => mock.SomeMethodCall(paramX)).ReturnsAsync(responseX);
		
		// ACT
		var result = await _service.ProcessXXX(paramX);
	
		// ASSERT
		result.status.Should().NotBeNull();
		// ... assert whatever
	}
}