public void CreateFromString_CreatesIdCorrectly()
{
var traceId = TraceId.CreateRandom();
var recreatedId = TraceId.CreateFromString(traceId.ToString());
recreatedId.Should().Be(traceId);
}
private void RunSamplerTest(
ISampler sampler,
int iterations,
float expectedAutoKeepRate,
float acceptableVariancePercent)
{
var sampleSize = iterations;
var autoKeeps = 0;
int seed = new Random().Next();
var idGenerator = new SpanIdGenerator(seed);
while (sampleSize-- > 0)
{
var traceId = TraceId.CreateRandom();
var span = GetMyServiceSpan(traceId);
var priority = sampler.GetSamplingPriority(span);
if (priority == SamplingPriority.AutoKeep)
{
autoKeeps++;
}
}
var autoKeepRate = autoKeeps / (float)iterations;
var lowerLimit = expectedAutoKeepRate * (1 - acceptableVariancePercent);
var upperLimit = expectedAutoKeepRate * (1 + acceptableVariancePercent);
Assert.True(
autoKeepRate >= lowerLimit && autoKeepRate <= upperLimit,
$"Expected between {lowerLimit} and {upperLimit}, actual rate is {autoKeepRate}. Random generator seeded with {seed}.");
}
public void CreateRandom_CreatesValid128BitId()
{
var traceId = TraceId.CreateRandom();
using (new AssertionScope())
{
traceId.ToString().Should().HaveLength(32);
FluentActions.Invoking(() => Convert.ToUInt64(traceId.ToString().Substring(startIndex: 0, length: 16), fromBase: 16)).Should().NotThrow();
FluentActions.Invoking(() => Convert.ToUInt64(traceId.ToString().Substring(startIndex: 16, length: 16), fromBase: 16)).Should().NotThrow();
}
}
public void Equals_WorksCorrectlyFor128BitId()
{
var traceId1 = TraceId.CreateRandom();
var traceId2 = TraceId.CreateRandom();
using (new AssertionScope())
{
traceId1.Should().Be(TraceId.CreateFromString(traceId1.ToString()));
traceId2.Should().Be(TraceId.CreateFromString(traceId2.ToString()));
traceId1.Should().NotBe(TraceId.CreateFromString(traceId2.ToString()));
traceId2.Should().NotBe(TraceId.CreateFromString(traceId1.ToString()));
}
}
public void SetHeaders_InjectsTheHeadersCorrectly(IHeadersCollection headers)
{
var traceId = TraceId.CreateRandom();
var spanContext = new SpanContext(traceId, 123, SamplingPriority.AutoKeep);
ServerTimingHeader.SetHeaders(spanContext, headers, (h, name, value) => h.Add(name, value));
using (new AssertionScope())
{
headers.GetValues("Server-Timing").Should().HaveCount(1);
headers.GetValues("Server-Timing").Should().Equal($"traceparent;desc=\"00-{traceId.ToString()}-000000000000007b-01\"");
headers.GetValues("Access-Control-Expose-Headers").Should().HaveCount(1);
headers.GetValues("Access-Control-Expose-Headers").Should().Equal("Server-Timing");
}
}
public TraceId GenerateNewTraceId() => TraceId.CreateRandom();
public void Lower_Returns64LowerBitsOfId()
{
var traceId = TraceId.CreateRandom();
traceId.Lower.Should().Be(Convert.ToInt64(traceId.ToString().Substring(startIndex: 16, length: 16), fromBase: 16));
}
public void Equals_WorksCorrectly()
{
var traceId1 = TraceId.CreateRandom();
traceId1.Should().Be(TraceId.CreateFromString(traceId1.ToString()));
}