public void GetObservationsByRegion()
        {
            //Arrange
            var service = new ObservationDataService(repository);

            //Act
            Region region = new Region
            {
                RegionID     = 1,
                RegionName   = "Groenten",
                WarehouseID  = 1,
                SensorID     = 1,
                Observations = null,
                Racks        = null
            };

            List <Observation> observations = service.GetObservationsByRegion(region);

            //Assert
            Assert.IsNotNull(observations);
        }