CODEWITHSUNDEEP
c#moqasp.net-core-webapixunithttp-status-codes
user8532173
user8532173

Reputation:

How to Assert StatusCode from raw POST request in my unit tests?

I am using ASP.NET Core 2 WebAPI, xUnit, Moq.

I have a problem. I was trying the solution from this answer and this answer. Other found answers seem to be similar to these two.

With both mentioned approaches we are using casting of the IActionResult result object to ObjectResult or OkObjectResult.

The main problem with my project is that after casting object result is null.

Test method:

[Fact]
        public async Task Post_CalledWithDefaultSetup_CallsAllMethods()
        {
            //default setup arranged in the ctor

            IActionResult result = await _controller.Post();
            var okResult = result as ObjectResult;

            Assert.Equal(StatusCodes.Status200OK, okResult.StatusCode);
        }

result object on debug: result

And tested method:

[HttpPost]
        public async Task<IActionResult> Post()
        {
            //do some logic here
            return StatusCode((int)HttpStatusCode.OK); //debug hits this
        }

Also in my test class ctor I am arranging my mocks and ControllerContext:

_serializationServiceMock.Setup(s => s.UnzipData(_array))
                .Returns(_jsonExample);
            _serializationServiceMock.Setup(s => s.DeserializeDataFromJson(_jsonExample))
                .Returns(_listPersonModel);

            var stream = new MemoryStream(_array);
            var httpContext = new DefaultHttpContext();
            httpContext.Request.Body = stream;
            httpContext.Request.ContentLength = stream.Length;
            var controllerContext = new ControllerContext()
            {
                HttpContext = httpContext,
            };
            _controller = new DataController(_repositoryMock.Object, _serializationServiceMock.Object) { ControllerContext = controllerContext };

Upvotes: 3

Views: 6247

Answers (1)

ilkerkaran
ilkerkaran

Reputation: 4354

In your code block, the controller method returns StatusCodeResult type. But you try to cast it to ObjectResult. That's why you get null.

You can solve this in 2 ways;

1 -) You can use return Ok() instead of return StatusCode(...) so your controller method will return OkResult and with parametered call Ok(someObj) it will return OkObjectResult.

2 -) you can cast Post result to StatusCodeResult instead of ObjectResult since your endpoint returns status code result like below.

 var okResult = result as StatusCodeResult;

Upvotes: 4

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