+ core: provide generic way to scale time and memory metrics

1 files changed, 64 insertions, 0 deletions

diff --git a/kamon-core/src/test/scala/kamon/util/NeedToScaleSpec.scala b/kamon-core/src/test/scala/kamon/util/NeedToScaleSpec.scala
new file mode 100644
index 00000000..3486a60c
--- /dev/null
+++ b/kamon-core/src/test/scala/kamon/util/NeedToScaleSpec.scala
@@ -0,0 +1,64 @@
+/*
+ * =========================================================================================
+ * Copyright © 2013-2015 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.util
+
+import com.typesafe.config.ConfigFactory
+import kamon.metric.instrument.{Memory, Time}
+import org.scalatest.{Matchers, WordSpec}
+
+class NeedToScaleSpec extends WordSpec with Matchers {
+
+  "NeedToScale" should {
+    "extract time unit to scale to from config" in {
+      val config = ConfigFactory.parseString(
+        """
+          |time-units = "ms"
+        """.stripMargin)
+
+      config match {
+        case NeedToScale(timeUnits, memoryUnits) =>
+          timeUnits should be(Some(Time.Milliseconds))
+          memoryUnits should be(None)
+      }
+    }
+    "extract memory unit to scale to from config" in {
+      val config = ConfigFactory.parseString(
+        """
+          |memory-units = "kb"
+        """.stripMargin)
+
+      config match {
+        case NeedToScale(timeUnits, memoryUnits) =>
+          timeUnits should be(None)
+          memoryUnits should be(Some(Memory.KiloBytes))
+      }
+    }
+    "extract nothing if config has no proper keys" in {
+      val config = ConfigFactory.parseString(
+        """
+          |some-other-key = "value"
+        """.stripMargin)
+
+      config match {
+        case NeedToScale(timeUnits, memoryUnits) =>
+          fail("Should not match")
+        case _ =>
+      }
+    }
+  }
+
+}