public void InitialProbabilityIsSet(double prob, long expectedValue)
{
var sampler = new TraceIdDynamicRatioSampler(prob);
Assert.Equal(prob, sampler.GetCurrentSamplingProbability());
Assert.Equal(expectedValue, sampler.GetCurrentTraceIdUpperBound());
}
public void UpdateProbabilityWorksProperly()
{
var sampler = new TraceIdDynamicRatioSampler(1);
sampler.UpdateSamplingProbability(0);
Assert.Equal(0, sampler.GetCurrentSamplingProbability());
Assert.Equal(long.MinValue, sampler.GetCurrentTraceIdUpperBound());
sampler.UpdateSamplingProbability(0.5);
Assert.Equal(0.5, sampler.GetCurrentSamplingProbability());
Assert.Equal(4611686018427387904, sampler.GetCurrentTraceIdUpperBound());
sampler.UpdateSamplingProbability(0.25);
Assert.Equal(0.25, sampler.GetCurrentSamplingProbability());
Assert.Equal(2305843009213693952, sampler.GetCurrentTraceIdUpperBound());
sampler.UpdateSamplingProbability(0.1);
Assert.Equal(0.1, sampler.GetCurrentSamplingProbability());
Assert.Equal(922337203685477632, sampler.GetCurrentTraceIdUpperBound());
}
