Model state validation in unit tests

Question

I am writing a unit test for a controller like this:

public HttpResponseMessage PostLogin(LoginModel model)
{
    if (!ModelState.IsValid)
        return new         


        

Answer 1

As mentioned before, you need integration tests to validate the ModelState. So, with Asp.Net Core, I'm digging this question to add a simple solution for integrating tests with Asp.Net Core and validation of ModelState

Add the package Microsoft.AspNetCore.TestHost and you can submit requests this simple:

var server = new TestServer(new WebHostBuilder().UseStartup());
var client = server.CreateClient();
var model = new { Name = String.Empty };
var content = new StringContent(JsonConvert.SerializeObject(model), Encoding.UTF8, "application/json");
var result = await client.PostAsync("/api/yourApiEndpoint", content);
result.StatusCode.Should().Be(HttpStatusCode.BadRequest);

You can find more about it here: http://asp.net-hacker.rocks/2017/09/27/testing-aspnetcore.html

Hope it helps.