public void AdaptiveSampler_CheckMaxTelemetry_OutOfBound()
{
AdaptiveSampler sampler = new AdaptiveSampler(-5, 0.5);
sampler.CheckMaxTelemetryItemsPerSecond(-5);
Assert.Equal(0, sampler.GetMaxTelemetryItemsPerSecond());
}
public void AdaptiveSampler_CheckNewProbability_Adjusted()
{
double oldProbability = 0.5;
int maxSamplesAllowed = 10; // should stay at 0.5
SamplingParameters parameters = new SamplingParameters(this.parent, this.traceId, "test", this.activityKindServer, null, null);
AdaptiveSampler sampler = new AdaptiveSampler(maxSamplesAllowed, oldProbability);
// run for 200 seconds to let adaptive sampling adjust
for (int i = 0; i < 200; i++)
{
// send 20 events each second
int events = 20;
for (int j = 0; j < events; j++)
{
sampler.ShouldSample(parameters);
Thread.Sleep(1000 / events);
}
}
// probability should be around (10/20) 0.5
double expectedProbability = 0.5;
Assert.True(expectedProbability - 0.1 <= sampler.ProbSampler.GetProbability() && sampler.ProbSampler.GetProbability() <= expectedProbability + 0.2);
// max increases, so probability should increase to around 1
sampler.CheckMaxTelemetryItemsPerSecond(40);
// run for 200 seconds to let adaptive sampling adjust
for (int i = 0; i < 200; i++)
{
// send 20 events each second
int events = 20;
for (int j = 0; j < events; j++)
{
sampler.ShouldSample(parameters);
Thread.Sleep(1000 / events);
}
}
expectedProbability = 1;
Assert.Equal(expectedProbability, sampler.ProbSampler.GetProbability());
Assert.True(expectedProbability - 0.1 <= sampler.ProbSampler.GetProbability() && sampler.ProbSampler.GetProbability() <= expectedProbability + 0.2);
}
