public void Verify_TaxAssement_Insert_When_Called() { //map classes _mapper = new Mapper(new MapperConfiguration(cfg => cfg.CreateMap <TaxAssessment, Dto.DataAccess.TaxAssessment>().ReverseMap() )); // instantiate data access class _taxDataAccess = new TaxDataAccess(_taxAdministrationContext.Object, _mapper); _mockTaxAssessment = new Mock <DbSet <TaxAssessment> >(); _taxAdministrationContext.Setup(m => m.TaxAssessment).Returns(_mockTaxAssessment.Object); Assert.IsTrue(_taxDataAccess.AddTaxAssessment(new Dto.DataAccess.TaxAssessment { TaxAssessmentId = 1, NettIncome = 5000, IncomeTax = 500, TaxTypeId = 1, UserCreated = "TaxAssessmentInsertTest", DateCreated = DateTime.Now }) > 0); }