public async Task Should_Success_Get_Tax_Generate_Data_Excel_Null_Parameter() { UnitPaymentOrderFacade facade = new UnitPaymentOrderFacade(GetServiceProvider(GetCurrentMethod()).Object, _dbContext(GetCurrentMethod())); var model = await _dataUtil(facade, GetCurrentMethod()).GetTestData(); var Response = facade.GenerateExcelTax("", "", DateTime.MinValue, DateTime.MaxValue, DateTime.MinValue, DateTime.MaxValue, 7); Assert.IsType <System.IO.MemoryStream>(Response); }