public void Validate_DefaultValue()
        {
            GarmentCoverLetterViewModel viewModel = new GarmentCoverLetterViewModel();

            var result = viewModel.Validate(null);

            Assert.NotEmpty(result.ToList());
        }
        public void Validate_EmptyValue()
        {
            GarmentCoverLetterViewModel viewModel = new GarmentCoverLetterViewModel
            {
                date        = DateTimeOffset.MinValue,
                bookingDate = DateTimeOffset.MinValue,
                order       = new Buyer {
                    Id = 0
                },
                forwarder = new Forwarder {
                    id = 0
                },
                exportEstimationDate = DateTimeOffset.MinValue,
                shippingStaff        = new ShippingStaff {
                    id = 0
                }
            };

            var result = viewModel.Validate(null);

            Assert.NotEmpty(result.ToList());
        }