public void GetAllOblastTest() { var oblastList = new List <Oblast> { new Oblast { Id = 1, Name = "Test" } }; var repository = new Mock <IOblastRepository>(); repository.Setup(r => r.GetAllOblasts()).Returns(oblastList); var oblastController = new OblastController(repository.Object); var oblast = oblastController.GetAllOblasts(); Assert.IsAssignableFrom <IEnumerable <Oblast> >(oblast); }