public void IsSampled_SpanContextDebug()
{
var rateSampler = new RateSampler(0f);
var traceContext = _fixture.Create <SpanContext>();
traceContext.Debug = true;
traceContext.Sampled = null;
var sampled = rateSampler.IsSampled(traceContext);
Assert.True(sampled);
}
public void IsSampled_NeverSample(float rate)
{
var rateSampler = new RateSampler(rate);
for (var i = 0; i < 1000; i++)
{
var traceContext = _fixture.Create <SpanContext>();
traceContext.Debug = false;
traceContext.Sampled = null;
var sampled = rateSampler.IsSampled(traceContext);
Assert.False(sampled);
}
}
public void IsSampled_SpecificSampleRate(float rate)
{
var rateSampler = new RateSampler(rate);
var decisions = new List <bool>();
for (var i = 0; i < 10000; i++)
{
var traceContext = _fixture.Create <SpanContext>();
traceContext.Debug = false;
traceContext.Sampled = null;
var sampled = rateSampler.IsSampled(traceContext);
decisions.Add(sampled);
}
var expectedSampleCount = rate * 10000;
var sampleDecisions = decisions.Where(d => d);
Assert.Equal(expectedSampleCount, sampleDecisions.Count());
}
public void IsSampled_SamplingDecisionAlreadyMade(float rate, bool decision)
{
var rateSampler = new RateSampler(rate);
for (var i = 0; i < 1000; i++)
{
var traceContext = _fixture.Create <SpanContext>();
traceContext.Debug = false;
traceContext.Sampled = decision;
var sampled = rateSampler.IsSampled(traceContext);
if (decision)
{
Assert.True(sampled);
}
else
{
Assert.False(sampled);
}
}
}