public void GetAllCustomersInMexicoSwedenAndGermanyTest() { // ACT IHttpActionResult actionResult = _customersController.GetAllFromMexicoSwedenGermany(); var contentResult = actionResult as OkNegotiatedContentResult <IQueryable <Customer> >; // ASSERT Assert.IsNotNull(contentResult); Assert.IsNotNull(contentResult.Content); Assert.AreEqual(contentResult.Content.Count(), 18); }