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c#unit-testingasp.net-web-apiasync-await
Captain America
Captain America

Reputation: 1942

Unit Test Async WebAPI 2 Get Request

I am trying to test my web api methods that are using async and they never return a result.

Here is the control method:

[HttpGet]
[Route("{id}")]
[ResponseType(typeof(IEmployee))]
public async Task<IHttpActionResult> Get(string id)
{
    try
    {
        IEmployee result = await _repoEmployee.GetEmployeeAsync(id);

        return Ok(result);
    }
    catch (Exception ex)
    {
        logit.Error($@"An error occurred while trying to get Employee for Employee number ""{id}"".", ex);
        throw;
    }
}

Here is the test using NUnit:

[TestCase("0677")]
public async Task EmployeeController_Get_GiveValidEmpID_Success(string employeeNumber)
{
    Setup();

    // Act
    IHttpActionResult getResult = await _controller.Get(employeeNumber);

    var contentResult = getResult as NegotiatedContentResult<IEmployee>;

    // Assert
    Assert.IsNotNull(contentResult);
    Assert.AreEqual(HttpStatusCode.Accepted, contentResult.StatusCode);
    Assert.IsNotNull(contentResult.Content);
    Assert.AreEqual(employeeNumber, contentResult.Content.Person.EmployeeNumber);
}

If I debug the Get method the correct results appear in the result variable but when it gets back to the test method the getResult is nothing.

Where am I going wrong and how can I fix it in order to test the results?

Thanks!

Upvotes: 0

Views: 585

Answers (1)

DavidG
DavidG

Reputation: 119146

Because getResult is not of type NegotiatedContentResult<IEmployee> the cast results in a null value for contentResult. Instead, you probably want to cast to OkNegotiatedContentResult<IEmployee>:

var contentResult = getResult as OkNegotiatedContentResult<IEmployee>;

Upvotes: 2

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