= core: first simple approach to providing traces and a subscription mechanism.

1 files changed, 101 insertions, 0 deletions

diff --git a/kamon-core/src/test/scala/kamon/trace/SimpleTraceSpec.scala b/kamon-core/src/test/scala/kamon/trace/SimpleTraceSpec.scala
new file mode 100644
index 00000000..a263ff7f
--- /dev/null
+++ b/kamon-core/src/test/scala/kamon/trace/SimpleTraceSpec.scala
@@ -0,0 +1,101 @@
+/*
+ * =========================================================================================
+ * Copyright © 2013-2014 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 akka.actor.ActorSystem
+import akka.testkit.{ ImplicitSender, TestKitBase }
+import com.typesafe.config.ConfigFactory
+import kamon.Kamon
+import org.scalatest.{ Matchers, WordSpecLike }
+import scala.concurrent.duration._
+
+class SimpleTraceSpec extends TestKitBase with WordSpecLike with Matchers with ImplicitSender {
+  implicit lazy val system: ActorSystem = ActorSystem("simple-trace-spec", ConfigFactory.parseString(
+    """
+      |kamon.metrics {
+      |  tick-interval = 1 hour
+      |  filters = [
+      |    {
+      |      trace {
+      |        includes = [ "*" ]
+      |        excludes = [ "non-tracked-trace"]
+      |      }
+      |    }
+      |  ]
+      |  precision {
+      |    default-histogram-precision {
+      |      highest-trackable-value = 3600000000000
+      |      significant-value-digits = 2
+      |    }
+      |
+      |    default-min-max-counter-precision {
+      |      refresh-interval = 1 second
+      |      highest-trackable-value = 999999999
+      |      significant-value-digits = 2
+      |    }
+      |  }
+      |}
+      |
+      |kamon.trace {
+      |  level = simple-trace
+      |  sampling = all
+      |}
+    """.stripMargin))
+
+  "the simple tracing" should {
+    "send a TraceInfo when the trace has finished and all segments are finished" in {
+      Kamon(Trace)(system).subscribe(testActor)
+
+      TraceRecorder.withNewTraceContext("simple-trace-without-segments") {
+        TraceRecorder.currentContext.startSegment("segment-one", "test-segment", "test").finish()
+        TraceRecorder.currentContext.startSegment("segment-two", "test-segment", "test").finish()
+        TraceRecorder.finish()
+      }
+
+      val traceInfo = expectMsgType[TraceInfo]
+      Kamon(Trace)(system).unsubscribe(testActor)
+
+      traceInfo.name should be("simple-trace-without-segments")
+      traceInfo.segments.size should be(2)
+      traceInfo.segments.find(_.name == "segment-one") should be('defined)
+      traceInfo.segments.find(_.name == "segment-two") should be('defined)
+    }
+
+    "incubate the tracing context if there are open segments after finishing" in {
+      Kamon(Trace)(system).subscribe(testActor)
+
+      val secondSegment = TraceRecorder.withNewTraceContext("simple-trace-without-segments") {
+        TraceRecorder.currentContext.startSegment("segment-one", "test-segment", "test").finish()
+        val segment = TraceRecorder.currentContext.startSegment("segment-two", "test-segment", "test")
+        TraceRecorder.finish()
+        segment
+      }
+
+      expectNoMsg(2 seconds)
+      secondSegment.finish()
+
+      val traceInfo = expectMsgType[TraceInfo]
+      Kamon(Trace)(system).unsubscribe(testActor)
+
+      traceInfo.name should be("simple-trace-without-segments")
+      traceInfo.segments.size should be(2)
+      traceInfo.segments.find(_.name == "segment-one") should be('defined)
+      traceInfo.segments.find(_.name == "segment-two") should be('defined)
+    }
+
+  }
+}