public void FindAllForStationId()
{
_repository.Save(CreateDataPoint(stationId: "myStationId1", sensorValueNumber: 1));
_repository.Save(CreateDataPoint(stationId: "myStationId2", sensorValueNumber: 2));
IList <DataPoint> allForStationId = _repository.FindAllByStationId("myStationId1");
Assert.Equal(1, allForStationId.Count);
Assert.Equal(1, allForStationId[0].SensorValueNumber);
}