add SpanContextCodecSpec

1 files changed, 106 insertions, 0 deletions

diff --git a/kamon-core/src/test/scala/kamon/trace/SpanContextCodecSpec.scala b/kamon-core/src/test/scala/kamon/trace/SpanContextCodecSpec.scala
new file mode 100644
index 00000000..5fa6200d
--- /dev/null
+++ b/kamon-core/src/test/scala/kamon/trace/SpanContextCodecSpec.scala
@@ -0,0 +1,106 @@
+/*
+ * =========================================================================================
+ * 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 java.util
+
+import io.opentracing.propagation.TextMap
+import org.scalatest.{Matchers, WordSpecLike}
+
+
+class SpanContextCodecSpec extends WordSpecLike with Matchers {
+  "The Span Context Codec" should {
+
+    "supports Text Map extraction" in {
+      val textMap = MapTextMap()
+      textMap.put("TRACE_ID", "1")
+      textMap.put("PARENT_ID", "2")
+      textMap.put("SPAN_ID", "3")
+      textMap.put("SAMPLED", "sampled")
+      textMap.put("BAGGAGE_1", "awesome-baggage-1")
+      textMap.put("BAGGAGE_2", "awesome-baggage-2")
+
+      val spanContext = SpanContextCodec.TextMap.extract(textMap, Sampler.never)
+
+      spanContext.traceID should be(1)
+      spanContext.parentID should be(2)
+      spanContext.spanID should be(3)
+      spanContext.sampled should be(false)
+      spanContext.baggageMap should be(Map("1" -> "awesome-baggage-1", "2" -> "awesome-baggage-2"))
+    }
+
+    "supports Text Map injection" in {
+      val textMap = MapTextMap()
+
+      SpanContextCodec.TextMap.inject(new SpanContext(1, 2, 3, false, Map("MDC" -> "awesome-mdc-value")), textMap)
+
+      textMap.map.get("TRACE_ID") should be("0000000000000001")
+      textMap.map.get("PARENT_ID") should be("0000000000000003")
+      textMap.map.get("SPAN_ID") should be("0000000000000002")
+      textMap.map.get("SAMPLED") should be(null)
+      textMap.map.get("BAGGAGE_MDC") should be("awesome-mdc-value")
+    }
+
+    "supports Http Headers extraction" in {
+      val textMap = MapTextMap()
+      textMap.put("X-B3-TraceId", "1")
+      textMap.put("X-B3-ParentSpanId", "2")
+      textMap.put("X-B3-SpanId", "3")
+      textMap.put("X-B3-Sampled", "sampled")
+      textMap.put("X-B3-Baggage-1", "awesome-baggage-1")
+      textMap.put("X-B3-Baggage-2", "awesome-baggage-2")
+
+      val spanContext = SpanContextCodec.ZipkinB3.extract(textMap, Sampler.never)
+
+      spanContext.traceID should be(1)
+      spanContext.parentID should be(2)
+      spanContext.spanID should be(3)
+      spanContext.sampled should be(false)
+      spanContext.baggageMap should be(Map("1" -> "awesome-baggage-1", "2" -> "awesome-baggage-2"))
+    }
+
+    "supports Http Headers injection" in {
+      val textMap = MapTextMap()
+
+      SpanContextCodec.ZipkinB3.inject(new SpanContext(1, 2, 3, false, Map("MDC" -> "awesome-mdc-value")), textMap)
+
+      textMap.map.get("X-B3-TraceId") should be("0000000000000001")
+      textMap.map.get("X-B3-ParentSpanId") should be("0000000000000003")
+      textMap.map.get("X-B3-SpanId") should be("0000000000000002")
+      textMap.map.get("X-B3-Sampled") should be(null)
+      textMap.map.get("X-B3-Baggage-MDC") should be("awesome-mdc-value")
+    }
+  }
+}
+
+class MapTextMap extends TextMap {
+  val map = new util.HashMap[String, String]()
+
+  override def iterator: util.Iterator[util.Map.Entry[String, String]] =
+    map.entrySet.iterator
+
+  override def put(key: String, value: String): Unit = {
+    map.put(key, value)
+  }
+}
+
+object MapTextMap {
+  def apply(): MapTextMap = new MapTextMap()
+}
+
+
+