public void ShouldReturnCliensInOrangeZone() { IQueryable clients = new List <Client>() { new Client() { FirstName = "Abu", LastName = "Daby", Balance = 0, PhoneNumber = "743843", Zone = ClientZoneOfBalance.Orange }, new Client() { FirstName = "Nujy", LastName = "fros", Balance = 7474, PhoneNumber = "7373833", Zone = ClientZoneOfBalance.Green }, new Client() { FirstName = "Huba", LastName = "Buba", Balance = 0, PhoneNumber = "78899", Zone = ClientZoneOfBalance.Orange } }.AsQueryable(); dataContextRepository.Clients.Returns(clients); IQueryable <Client> recivedClients = bussinesService.GetClientsFromOrangeZone(); Assert.AreEqual(2, recivedClients.Count()); }