How write a unit test for asynchronous Web API

Question

I have a project in C# and Framework 6. I have a WEB API to call the methods. what is the best way to write a unit test for async WebAPI methods?

This is the method I have:

[HttpGet]
[Route("GetYears")]
public Task<IEnumerable<Year>> GetYearsAsync()
{
     return reditApplicationsRepository.GetYearsAsync();         
}

Answer 1

You can use await to do this too.

[TestMethod]
public async Task GetYearsTest()
{
    //_sut is the System Under Test,  in this case is an instance of your controller
    var years = await _sut.GetYears();
    //Any Assert that you want
}

And to stub the return of the method creditApplicationsRepository.GetYearsAsync(); use this Task.FromResult(mockReturn).