public void GetRemainingVendors_ReturnsUnusedVendors()
        {
            var unitOfWork = GetUnitOfWork();
            var controller = new DistrictController(unitOfWork);

            var result = controller.GetRemainingVendors(3);

            Assert.IsNotNull(result);
            var resultList = result.ToList();

            Assert.AreEqual(1, resultList.Count);
            Assert.AreEqual(2, resultList.First().VendorId);
        }