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Diffstat (limited to 'kamon-core/src/test/scala/kamon/trace/B3SpanCodecSpec.scala')
| -rw-r--r-- | kamon-core/src/test/scala/kamon/trace/B3SpanCodecSpec.scala | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/kamon-core/src/test/scala/kamon/trace/B3SpanCodecSpec.scala b/kamon-core/src/test/scala/kamon/trace/B3SpanCodecSpec.scala new file mode 100644 index 00000000..e6fa283e --- /dev/null +++ b/kamon-core/src/test/scala/kamon/trace/B3SpanCodecSpec.scala @@ -0,0 +1,192 @@ +/* + * ========================================================================================= + * Copyright © 2013-2017 the kamon project <http://kamon.io/> + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software distributed under the + * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, + * either express or implied. See the License for the specific language governing permissions + * and limitations under the License. + * ========================================================================================= + */ + +package kamon.trace + +import kamon.context.{Context, TextMap} +import kamon.testkit.SpanBuilding +import kamon.trace.IdentityProvider.Identifier +import kamon.trace.SpanContext.SamplingDecision +import org.scalatest.{Matchers, OptionValues, WordSpecLike} + + +class B3SpanCodecSpec extends WordSpecLike with Matchers with OptionValues with SpanBuilding { + val extendedB3Codec = SpanCodec.B3() + + "The ExtendedB3 SpanContextCodec" should { + "return a TextMap containing the SpanContext data" in { + val context = testContext() + + val textMap = extendedB3Codec.encode(context) + textMap.get("X-B3-TraceId").value shouldBe "1234" + textMap.get("X-B3-ParentSpanId").value shouldBe "2222" + textMap.get("X-B3-SpanId").value shouldBe "4321" + textMap.get("X-B3-Sampled").value shouldBe "1" + } + + + "not inject anything if there is no Span in the Context" in { + val textMap = extendedB3Codec.encode(Context.Empty) + textMap.values shouldBe empty + } + + "extract a RemoteSpan from a TextMap when all fields are set" in { + val textMap = TextMap.Default() + textMap.put("X-B3-TraceId", "1234") + textMap.put("X-B3-ParentSpanId", "2222") + textMap.put("X-B3-SpanId", "4321") + textMap.put("X-B3-Sampled", "1") + textMap.put("X-B3-Extra-Baggage", "some=baggage;more=baggage") + + val spanContext = extendedB3Codec.decode(textMap, Context.Empty).get(Span.ContextKey).context() + spanContext.traceID.string shouldBe "1234" + spanContext.spanID.string shouldBe "4321" + spanContext.parentID.string shouldBe "2222" + spanContext.samplingDecision shouldBe SamplingDecision.Sample + } + + "decode the sampling decision based on the X-B3-Sampled header" in { + val sampledTextMap = TextMap.Default() + sampledTextMap.put("X-B3-TraceId", "1234") + sampledTextMap.put("X-B3-SpanId", "4321") + sampledTextMap.put("X-B3-Sampled", "1") + + val notSampledTextMap = TextMap.Default() + notSampledTextMap.put("X-B3-TraceId", "1234") + notSampledTextMap.put("X-B3-SpanId", "4321") + notSampledTextMap.put("X-B3-Sampled", "0") + + val noSamplingTextMap = TextMap.Default() + noSamplingTextMap.put("X-B3-TraceId", "1234") + noSamplingTextMap.put("X-B3-SpanId", "4321") + + extendedB3Codec.decode(sampledTextMap, Context.Empty) + .get(Span.ContextKey).context().samplingDecision shouldBe SamplingDecision.Sample + + extendedB3Codec.decode(notSampledTextMap, Context.Empty) + .get(Span.ContextKey).context().samplingDecision shouldBe SamplingDecision.DoNotSample + + extendedB3Codec.decode(noSamplingTextMap, Context.Empty) + .get(Span.ContextKey).context().samplingDecision shouldBe SamplingDecision.Unknown + } + + "not include the X-B3-Sampled header if the sampling decision is unknown" in { + val context = testContext() + val sampledSpanContext = context.get(Span.ContextKey).context() + val notSampledSpanContext = Context.Empty.withKey(Span.ContextKey, + Span.Remote(sampledSpanContext.copy(samplingDecision = SamplingDecision.DoNotSample))) + val unknownSamplingSpanContext = Context.Empty.withKey(Span.ContextKey, + Span.Remote(sampledSpanContext.copy(samplingDecision = SamplingDecision.Unknown))) + + extendedB3Codec.encode(context).get("X-B3-Sampled").value shouldBe("1") + extendedB3Codec.encode(notSampledSpanContext).get("X-B3-Sampled").value shouldBe("0") + extendedB3Codec.encode(unknownSamplingSpanContext).get("X-B3-Sampled") shouldBe empty + } + + "use the Debug flag to override the sampling decision, if provided." in { + val textMap = TextMap.Default() + textMap.put("X-B3-TraceId", "1234") + textMap.put("X-B3-SpanId", "4321") + textMap.put("X-B3-Sampled", "0") + textMap.put("X-B3-Flags", "1") + + val spanContext = extendedB3Codec.decode(textMap, Context.Empty).get(Span.ContextKey).context() + spanContext.samplingDecision shouldBe SamplingDecision.Sample + } + + "use the Debug flag as sampling decision when Sampled is not provided" in { + val textMap = TextMap.Default() + textMap.put("X-B3-TraceId", "1234") + textMap.put("X-B3-SpanId", "4321") + textMap.put("X-B3-Flags", "1") + + val spanContext = extendedB3Codec.decode(textMap, Context.Empty).get(Span.ContextKey).context() + spanContext.samplingDecision shouldBe SamplingDecision.Sample + } + + "extract a minimal SpanContext from a TextMap containing only the Trace ID and Span ID" in { + val textMap = TextMap.Default() + textMap.put("X-B3-TraceId", "1234") + textMap.put("X-B3-SpanId", "4321") + + val spanContext = extendedB3Codec.decode(textMap, Context.Empty).get(Span.ContextKey).context() + spanContext.traceID.string shouldBe "1234" + spanContext.spanID.string shouldBe "4321" + spanContext.parentID shouldBe IdentityProvider.NoIdentifier + spanContext.samplingDecision shouldBe SamplingDecision.Unknown + } + + "do not extract a SpanContext if Trace ID and Span ID are not provided" in { + val onlyTraceID = TextMap.Default() + onlyTraceID.put("X-B3-TraceId", "1234") + onlyTraceID.put("X-B3-Sampled", "0") + onlyTraceID.put("X-B3-Flags", "1") + + val onlySpanID = TextMap.Default() + onlySpanID.put("X-B3-SpanId", "4321") + onlySpanID.put("X-B3-Sampled", "0") + onlySpanID.put("X-B3-Flags", "1") + + val noIds = TextMap.Default() + noIds.put("X-B3-Sampled", "0") + noIds.put("X-B3-Flags", "1") + + extendedB3Codec.decode(onlyTraceID, Context.Empty).get(Span.ContextKey) shouldBe Span.Empty + extendedB3Codec.decode(onlySpanID, Context.Empty).get(Span.ContextKey) shouldBe Span.Empty + extendedB3Codec.decode(noIds, Context.Empty).get(Span.ContextKey) shouldBe Span.Empty + } + + "round trip a Span from TextMap -> Context -> TextMap" in { + val textMap = TextMap.Default() + textMap.put("X-B3-TraceId", "1234") + textMap.put("X-B3-ParentSpanId", "2222") + textMap.put("X-B3-SpanId", "4321") + textMap.put("X-B3-Sampled", "1") + + val context = extendedB3Codec.decode(textMap, Context.Empty) + val injectTextMap = extendedB3Codec.encode(context) + + textMap.values.toSeq should contain theSameElementsAs(injectTextMap.values.toSeq) + } + + /* + // TODO: Should we be supporting this use case? maybe even have the concept of Debug requests ourselves? + "internally carry the X-B3-Flags value so that it can be injected in outgoing requests" in { + val textMap = TextMap.Default() + textMap.put("X-B3-TraceId", "1234") + textMap.put("X-B3-ParentSpanId", "2222") + textMap.put("X-B3-SpanId", "4321") + textMap.put("X-B3-Sampled", "1") + textMap.put("X-B3-Flags", "1") + + val spanContext = extendedB3Codec.extract(textMap).value + val injectTextMap = extendedB3Codec.inject(spanContext) + + injectTextMap.get("X-B3-Flags").value shouldBe("1") + }*/ + } + + def testContext(): Context = { + val spanContext = createSpanContext().copy( + traceID = Identifier("1234", Array[Byte](1, 2, 3, 4)), + spanID = Identifier("4321", Array[Byte](4, 3, 2, 1)), + parentID = Identifier("2222", Array[Byte](2, 2, 2, 2)) + ) + + Context.create().withKey(Span.ContextKey, Span.Remote(spanContext)) + } + +}
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