public void GetAllClients_Test()
        {
            Client client = new Client()
            {
                Name       = "TestClient",
                Symbol     = "TestSymbol",
                NIP        = "3234321234",
                State      = "TestState",
                City       = "TestCity",
                Street     = "TestStreet",
                PostalCode = "11-111",
                Phone      = "123-123-123",
                Email      = "*****@*****.**",
                RevenueId  = 1,
                Revenue    = new Revenue()
                {
                    Name   = "TestRevenue",
                    City   = "TestCity",
                    Street = "TestStreet"
                }
            };

            //Arrange
            var mock = new Mock <IDbContext>();

            mock.Setup(x => x.Set <Client>())
            .Returns(new FakeDbSet <Client>
            {
                client
            });
            // Act
            ClientViewModel dvm = new ClientViewModel(null, mock.Object);


            var allClients = dvm.GetDataFromDB(mock.Object);

            // Assert
            Assert.AreEqual(1, allClients.Count());
        }