public void GetCursussenInstantiesShouldReturnAQueryableOfCursusInstanties() { var cursusInstantiesQueryable = new List <CursusInstantie> { CursusInstantieBuilder.New().WithStartDate(new DateTime(2020, 02, 02)).Build(), CursusInstantieBuilder.New().WithStartDate(new DateTime(2020, 03, 03)).Build(), CursusInstantieBuilder.New().WithStartDate(new DateTime(2020, 04, 04)).Build(), CursusInstantieBuilder.New().WithStartDate(new DateTime(2020, 04, 04)).Build(), CursusInstantieBuilder.New().WithStartDate(new DateTime(2020, 04, 04)).Build() }; _cursusInstantieRepositoryMock.Setup(x => x.GetCursusInstanties()).Returns(cursusInstantiesQueryable); var cursusInstanties = _sut.GetCursussen(); Assert.IsNotNull(cursusInstanties); Assert.IsTrue(cursusInstanties.Count() == 5); }