Hey guys, I have this problem and really could use some help/explination. I'm fairly new to Umbraco, unit testing and Mocking so bear with me please. I have this simple method in my UmbracoApiController that checks if a certain DocType allows variations. Now the problem lies with trying to test this method. I always recieve a nullReferenceException. I think it probably has something to do with bad Mocking, because I never seem te get the right data. If someone can point me in the right direction, that would be greatly appreciated.

This is my API Controller:

  public class PersonalizationApiController: UmbracoAuthorizedApiController
    {
        private readonly IScopeProvider _scopeProvider;
        private readonly IContentTypeService _contentTypeService;
        public PersonalizationApiController(IScopeProvider scopeProvider, IContentTypeService contentTypeService)
        {
            _scopeProvider = scopeProvider;
            _contentTypeService = contentTypeService;
        }  
[AllowAnonymous]
        [HttpGet]
        public IHttpActionResult CheckIfDocTypeEnabled(string alias)
        {
            try
            {
                var ct = _contentTypeService.Get(alias);
                if (ct.Variations.VariesBySegment())
                {
                    return Ok(true);
                }
                else
                {
                    return Ok(false);
                }
            }
            catch (Exception e)
            {
                return BadRequest($"Error occured: {e}");
            }
        }

This is my test:

[TestFixture]
    public class PersonalizationApiControllerTests : UmbracoBaseTest
    {
        private PersonalizationApiController controller;
        private Mock<IContentTypeService> _contentTypeService = new Mock<IContentTypeService>();
        [SetUp]
        public override void SetUp()
        {
            base.SetUp();
            controller = new PersonalizationApiController(Mock.Of<IScopeProvider>(),_contentTypeService.Object);
        } 
[Test]
    public void WhenCheckIfDoctypeEnabledWithKnownDoctype_ThenReturnTrue()
    {
        //Arrange
        controller.Configuration = new HttpConfiguration();
        controller.Request = new System.Net.Http.HttpRequestMessage();

        //Act
        IHttpActionResult actionResult = controller.CheckIfDocTypeEnabled(ContentPage.ModelTypeAlias);
        var response = actionResult.ExecuteAsync(new System.Threading.CancellationToken());
        var result = JsonConvert.DeserializeObject<bool>(response.Result.Content.ReadAsStringAsync().Result);


        //Assert
        Assert.IsTrue(result);
    }

Kind regards,

Gerly