Unit test AspNetCore Controller check HttpStatusCode with ActionResult<T> result

Question

I'm trying to check the HttpStatusCode from a call to the controller but I can't figure out how to convert my ActionResult<T> to HttpStatusCodeResult.

Method from the controller :

[Get]
public async Task<ActionResult<PagedResult<PersoDemandLiteResponse>>> GetDemandsByFilterAsync([FromQuery] DemandFilterRequest filter)
    => await this.GetAsync(() => DemandService.GetDemandByFilterAsync(filter), (sources) => sources);

Here is my test method (simplified) :

... mocking of the services ...

var controller = new DemandController(demandService, organizationService.Object, productService.Object, Mapper.Object);

var request = new DemandFilterRequest { OrganizationId = Guid.NewGuid() };

var result = await controller.GetDemandsByFilterAsync(request);

//I would like to do something like this 
 var action = result as HttpStatusCodeResult;
 var badRequest = (int)HttpStatusCode.BadRequest;

 Assert.Equal(badRequest, action.StatusCode);

But I get the following error :

Error CS0039 Cannot convert type 'Microsoft.AspNetCore.Mvc.ActionResult>' to 'System.Web.Mvc.HttpStatusCodeResult' via a reference conversion, boxing conversion, unboxing conversion, wrapping conversion, or null type conversion.

Any idea on how to achieve this ?

Nkosi · Accepted Answer · 2021-11-04 22:38:26Z

4

Assuming the method under test returns a bad request as implied by the example code, that would have been something similar to

//...

if(...)
    return BadRequest();

//...

Then when unit testing, the wrapped result needs to be extracted from the action result

//Arrange
//...omitted for brevity

//Act
ActionResult<PagedResult<PersoDemandLiteResponse>> response = 
    await controller.GetDemandsByFilterAsync(request);
    
//Assert
BadRequestResult actual = response.Result as BadRequestResult;    
Assert.NotNull(actual);
int badRequest = (int)HttpStatusCode.BadRequest;
Assert.Equal(badRequest, actual.StatusCode);

Reference Controller action return types in ASP.NET Core Web API

edited Nov 4, 2021 at 22:38

answered Nov 14, 2019 at 12:06

Nkosi

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1 Comment

Gun Over a year ago

Great, I didn't how to manage to use it like this and yes, the method returns a bad request.

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