Building microservices with pipes & filters

Couple month ago I made a short report on .NET meetup in Minsk about how we build microservices in our company. Report is on Russian, but if will be requests, I can make an English subtitles.

Writing Web API controller tests

I am fan of TDD principle, and always trying to write tests first. Today I want to show, how I usually test Web API controller. There are two approaches:

1. Unit test

Consider UserController class, which has POST method that registers users.

public class UserController : ApiController

{

    private readonly IRegistrationService registrationService;

    public UserController(IRegistrationService registrationService)

    {

        this.registrationService = registrationService;

    }

    public HttpResponseMessage Post([FromBody]string json)

    {

        var model = new JavaScriptSerializer().Deserialize<RegistrationModel>(json);

        bool success = this.registrationService.Register(model);

        return new HttpResponseMessage(success ? HttpStatusCode.OK : HttpStatusCode.InternalServerError);

    }

}