public void CanRemoveExistingCourse() { var dummyCourse = DummyDataGenerator.CreateDummyCourse(); ICoursesModel model = new CoursesModel(); dummyCourse.Id = model.AddOrUpdateCourse(dummyCourse).Id; // Remove the dummyCourse model.RemoveCourse(dummyCourse.Id); // Check that the course was removed from the Db var repo = new BizCollegeRepository<Course, string>(); var fromDb = repo.Get(dummyCourse.Id); Assert.IsNull(fromDb); }