106 lines
3.7 KiB
C#
106 lines
3.7 KiB
C#
// <copyright file="TraceIdRatioBasedSamplerTest.cs" company="OpenTelemetry Authors">
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// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// </copyright>
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using System.Diagnostics;
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using Xunit;
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namespace OpenTelemetry.Trace.Tests
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{
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public class TraceIdRatioBasedSamplerTest
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{
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private const string ActivityDisplayName = "MyActivityName";
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private static readonly ActivityKind ActivityKindServer = ActivityKind.Server;
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[Fact]
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public void OutOfRangeHighProbability()
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{
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Assert.Throws<ArgumentOutOfRangeException>(() => new TraceIdRatioBasedSampler(1.01));
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}
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[Fact]
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public void OutOfRangeLowProbability()
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{
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Assert.Throws<ArgumentOutOfRangeException>(() => new TraceIdRatioBasedSampler(-0.00001));
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}
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[Fact]
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public void SampleBasedOnTraceId()
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{
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Sampler defaultProbability = new TraceIdRatioBasedSampler(0.0001);
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// This traceId will not be sampled by the TraceIdRatioBasedSampler because the first 8 bytes as long
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// is not less than probability * Long.MAX_VALUE;
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var notSampledtraceId =
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ActivityTraceId.CreateFromBytes(
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new byte[]
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{
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0x8F,
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0xFF,
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0xFF,
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0xFF,
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0xFF,
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0xFF,
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0xFF,
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0xFF,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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});
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Assert.Equal(
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SamplingDecision.Drop,
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defaultProbability.ShouldSample(new SamplingParameters(default, notSampledtraceId, ActivityDisplayName, ActivityKindServer, null, null)).Decision);
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// This traceId will be sampled by the TraceIdRatioBasedSampler because the first 8 bytes as long
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// is less than probability * Long.MAX_VALUE;
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var sampledtraceId =
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ActivityTraceId.CreateFromBytes(
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new byte[]
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{
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0x00,
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0x00,
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0xFF,
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0xFF,
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0xFF,
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0xFF,
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0xFF,
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0xFF,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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});
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Assert.Equal(
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SamplingDecision.RecordAndSample,
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defaultProbability.ShouldSample(new SamplingParameters(default, sampledtraceId, ActivityDisplayName, ActivityKindServer, null, null)).Decision);
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}
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[Fact]
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public void GetDescription()
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{
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var expectedDescription = "TraceIdRatioBasedSampler{0.500000}";
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Assert.Equal(expectedDescription, new TraceIdRatioBasedSampler(0.5).Description);
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}
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}
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}
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