public void LogTest()
{
BinCounter b = new BinCounter(10, 0f, 1f);
float[] observations = new float[] { 0f, .01f, .51f };
float runningSum = 0f;
foreach (float o in observations)
{
b.Log(o);
runningSum += o;
}
float mean = runningSum / observations.Length;
Assert.AreEqual(observations.Length, b.TotalObservations, nameof(b.TotalObservations));
long bin0Cnt = b.Bins[0];
Assert.AreEqual(2, bin0Cnt, nameof(bin0Cnt));
long bin5Cnt = b.Bins[5];
Assert.AreEqual(1, bin5Cnt, nameof(bin5Cnt));
Assert.AreEqual(.51f, b.MaxObservation, nameof(b.MaxObservation));
Assert.AreEqual(0f, b.MinObservation, nameof(b.MinObservation));
Assert.AreEqual(mean, b.Mean, nameof(b.Mean));
b.Log((double)1);
long bin9Cnt = b.Bins[9];
Assert.AreEqual(1, bin9Cnt);
}
public void LogNaNtest()
{
BinCounter b = new BinCounter(10, -1, 1);
b.Log(-2);
b.Log(float.NaN); // This should get discarded
Assert.AreEqual(1, b.TotalObservations, nameof(b.TotalObservations));
}
public void LogAtBoundariesTest()
{
BinCounter b = new BinCounter(10, -1f, 1f);
b.Log(-1);
b.Log(1);
Assert.IsTrue(b.Bins[0] == 1, "Expected the first bin to have an entry. It didn't.");
Assert.IsTrue(b.Bins[b.NumBins - 1] == 1, "Expected the last bin to have an entry. It didn't.");
b.Log(.999999999);
Assert.IsTrue(b.Bins[b.NumBins - 1] == 2, "Failed adding value extremely close to RangeMax.");
}
public void LogBeyondBoundariesTest()
{
BinCounter b = new BinCounter(10, -1, 1);
b.Log(-2);
b.Log(2);
Assert.IsTrue(b.Bins[0] == 1);
Assert.IsTrue(b.Bins[b.NumBins - 1] == 1);
b.Log(3);
Assert.AreEqual(2, b.CountAboveRangeMax, nameof(b.CountAboveRangeMax));
Assert.AreEqual(1, b.CountBelowRangeMin, nameof(b.CountBelowRangeMin));
}
public void TryToOverflowBinsTest()
{
BinCounter b = new BinCounter(3, -1, 1);
b.Log(0f, 5);
b.Log(0f, long.MaxValue);
Assert.IsTrue(b.IsFull && b.TotalObservations == long.MaxValue && b.Bins[1] == long.MaxValue, "Individual bin overflow fail.");
b.Reset();
b.Log(0f, 5);
b.Log(1f, long.MaxValue - 4);
Assert.IsTrue(b.IsFull && b.TotalObservations == long.MaxValue, "TotalEntries overflow fail.");
}
public void GetHistogramAllEqualBinsTest()
{
BinCounter b = new BinCounter(10, -1, 1);
for (int i = 0; i < b.NumBins; i++)
{
// log one in each bin
b.Log(b.RangeMin + (b.BinSize / 2) + i * b.BinSize);
}
string s = b.GetHistogram();
Assert.IsTrue(s.IndexOf("TotalEntries: 10") > -1);
Assert.IsTrue(s.IndexOf("CountBelowRangeMin: 0") > -1);
Assert.IsTrue(s.IndexOf("CountAboveRangeMax: 0") > -1);
Assert.IsTrue(s.IndexOf("MedianBinIdx: 4") > -1);
// All of the bins should be the same max size of 100
string hundredStars = new string('*', 100);
string[] splitOn = new string[1];
splitOn[0] = hundredStars;
int count = s.Split(splitOn, System.StringSplitOptions.None).Length - 1;
Assert.IsTrue(count == b.NumBins, "Not all bins were the expected size." + count + "\nOutput was:\n" + s);
}
static void Main(string[] args)
{
BinCounter b = new BinCounter(30, 0, 2);
// Log a bunch of distributed data
Random r = new Random();
for (int i = 0; i < 10000; i++)
{
float dir = r.NextDouble() < .5 ? -1 : 1;
float dist = (float)Math.Pow(r.NextDouble(), 2);
b.Log(1 + dir * dist);
}
// Log a few outliers
b.Log(5f);
b.Log(-3f);
Console.WriteLine("TotalEntries: " + b.TotalObservations);
Console.WriteLine("Mean: " + b.Mean);
Console.WriteLine("A particular bin count: " + b.Bins[4]);
Console.WriteLine("\nFull histogram plus info:\n------" + b.GetHistogram());
}
public void ResetTest()
{
BinCounter b = new BinCounter(10, 0, 1);
System.Random r = new System.Random();
for (int i = 0; i < 500; i++)
{
b.Log((float)r.NextDouble());
}
// Log some outliers
b.Log(-5);
b.Log(10);
b.Log(1);
// All bins should have something in them.
foreach (int binVal in b.Bins)
{
Assert.IsTrue(binVal > 0, "Failure populating bins");
}
b.Reset();
// Make sure the entries counter is empty.
Assert.IsTrue(b.TotalObservations == 0, "Expected 0 TotalEntries. Found " + b.TotalObservations);
// Make sure all bins are empty.
bool foundSomething = false;
foreach (int binVal in b.Bins)
{
if (binVal > 0)
{
foundSomething = true;
break;
}
}
Assert.IsFalse(foundSomething, "Expected all bins to be empty. They weren't.");
Assert.AreEqual(0, b.CountAboveRangeMax, nameof(b.CountAboveRangeMax));
Assert.AreEqual(0, b.CountBelowRangeMin, nameof(b.CountBelowRangeMin));
Assert.AreEqual(float.NaN, b.Mean, nameof(b.Mean));
b.Log(1f);
b.Log(2f);
Assert.AreEqual(1f, b.MinObservation, nameof(b.MinObservation));
Assert.AreEqual(2f, b.MaxObservation, nameof(b.MaxObservation));
Assert.AreEqual(1.5f, b.Mean, nameof(b.Mean));
}