private void WriteData(long sampleSize, double dataPerSecond, TimeSpan duration, double?maxSamplesToKeepPerSecond, Action <Datum, double, DataRateCalculator.SamplingAction> calculatedDataRateKeepCallback)
{
DataRateCalculator dataRateCalculator = new DataRateCalculator(sampleSize, maxSamplesToKeepPerSecond);
long numData = (long)(dataPerSecond * duration.TotalSeconds);
double interDataTime = duration.TotalSeconds / numData;
DateTimeOffset startTimestamp = DateTimeOffset.UtcNow;
dataRateCalculator.Start(startTimestamp);
for (long i = 0; i < numData; ++i)
{
DateTimeOffset simulatedCurrentTime = startTimestamp.AddSeconds((i + 1) * interDataTime);
AccelerometerDatum datum = new AccelerometerDatum(simulatedCurrentTime, 1, 1, 1);
DataRateCalculator.SamplingAction samplingAction = dataRateCalculator.Add(datum);
double?calculatedDataPerSecond = dataRateCalculator.GetDataPerSecond();
if (i < sampleSize - 1)
{
Assert.IsNull(calculatedDataPerSecond);
}
else
{
Assert.NotNull(calculatedDataPerSecond);
calculatedDataRateKeepCallback?.Invoke(datum, calculatedDataPerSecond.Value, samplingAction);
}
}
}
public void DropNullDatumTest()
{
DataRateCalculator samplingRateCalculator = new DataRateCalculator(100);
samplingRateCalculator.Start();
Assert.AreEqual(samplingRateCalculator.Add(null), DataRateCalculator.SamplingAction.Drop);
}
public void ImmediateDataTest()
{
InitServiceHelper();
DataRateCalculator calculator = new DataRateCalculator(10, 1);
AccelerometerDatum datum = new AccelerometerDatum(DateTimeOffset.UtcNow, 1, 1, 1);
calculator.Start(datum.Timestamp);
for (int i = 0; i < calculator.SampleSize * 2; ++i)
{
DataRateCalculator.SamplingAction action = calculator.Add(datum);
if (i < calculator.SampleSize)
{
Assert.AreEqual(action, DataRateCalculator.SamplingAction.Keep);
}
else
{
Assert.AreEqual(action, DataRateCalculator.SamplingAction.Drop);
}
}
}
public void SamplingRateTest()
{
InitServiceHelper();
DataRateCalculator samplingRateCalculator = new DataRateCalculator(100);
samplingRateCalculator.Start();
double nominalDataPerSecond = 192;
double nominalSamplingDataRatePerSecond = 10;
TimeSpan duration = TimeSpan.FromSeconds(100);
WriteData(100, nominalDataPerSecond, duration, nominalSamplingDataRatePerSecond, (datum, calculatedDataPerSecond, action) =>
{
if (action == DataRateCalculator.SamplingAction.Keep)
{
Assert.AreEqual(samplingRateCalculator.Add(datum), DataRateCalculator.SamplingAction.Keep);
}
});
Assert.True(Math.Abs(samplingRateCalculator.GetDataPerSecond().Value - nominalSamplingDataRatePerSecond) <= 1);
}