public void GuaranteedThroughputProbabilisticSampler_Update_ShouldNotCreateNewSamplersWhenTheValuesDoNotChange()
{
var samplingRate = 0.4;
double lowerBound = 5;
var sampler = new GuaranteedThroughputProbabilisticSampler(samplingRate, lowerBound);
var updated = sampler.Update(samplingRate, lowerBound);
Assert.False(updated);
}
public void GuaranteedThroughputProbabilisticSampler_Update_ShouldCreateNewSamplersWhenTheValuesChange()
{
var samplingRate = 0.4;
double lowerBound = 5;
var sampler = new GuaranteedThroughputProbabilisticSampler(0.2, 4);
var updated = sampler.Update(samplingRate, lowerBound);
Assert.True(updated);
Assert.Equal(samplingRate, sampler._probabilisticSampler.SamplingRate);
Assert.Equal(lowerBound, sampler._rateLimitingSampler.MaxTracesPerSecond);
}
public void GuaranteedThroughputProbabilisticSampler_UsesDefaultSamplers()
{
var samplingRate = 0.4;
double lowerBound = 5;
var sampler = new GuaranteedThroughputProbabilisticSampler(samplingRate, lowerBound);
Assert.IsType <ProbabilisticSampler>(sampler._probabilisticSampler);
Assert.IsType <RateLimitingSampler>(sampler._rateLimitingSampler);
Assert.Equal(samplingRate, sampler._probabilisticSampler.SamplingRate);
Assert.Equal(lowerBound, sampler._rateLimitingSampler.MaxTracesPerSecond);
}
public void GuaranteedThroughputProbabilisticSampler_IsSampled_FallsBackToRateLimitingSampler()
{
var probabilisticSampler = Substitute.For <IProbabilisticSampler>();
var rateLimitingSampler = Substitute.For <IRateLimitingSampler>();
var traceId = new TraceId(1);
var operationName = "op";
var sampler = new GuaranteedThroughputProbabilisticSampler(probabilisticSampler, rateLimitingSampler);
probabilisticSampler.IsSampled(Arg.Is <TraceId>(t => t == traceId), Arg.Is <string>(o => o == operationName)).Returns((false, new Dictionary <string, object>()));
rateLimitingSampler.IsSampled(Arg.Is <TraceId>(t => t == traceId), Arg.Is <string>(o => o == operationName));
sampler.IsSampled(traceId, operationName);
probabilisticSampler.Received(1).IsSampled(Arg.Any <TraceId>(), Arg.Any <string>());
rateLimitingSampler.Received(1).IsSampled(Arg.Any <TraceId>(), Arg.Any <string>());
}
