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/*
* =========================================================================================
* 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.metric.instrument
import kamon.metric.instrument.UnitOfMeasurement.Unknown
import org.scalatest.{ Matchers, WordSpec }
class UnitOfMeasurementSpec extends WordSpec with Matchers {
"Time unit" should {
"resolve Time Unit by valid name" in {
Time("s") should be(Time.Seconds)
Time("n") should be(Time.Nanoseconds)
Time("ms") should be(Time.Milliseconds)
Time("µs") should be(Time.Microseconds)
}
"fail to resolve Time Unit by invalid name" in {
val ex = intercept[IllegalArgumentException](Time("boo"))
ex.getMessage should be("Can't recognize time unit 'boo'")
}
"scale time properly" in {
val epsilon = 0.0001
Time.Nanoseconds.scale(Time.Nanoseconds)(1000000D) should be(1000000D +- epsilon)
Time.Nanoseconds.scale(Time.Microseconds)(1000000D) should be(1000D +- epsilon)
Time.Nanoseconds.scale(Time.Milliseconds)(1000000D) should be(1D +- epsilon)
Time.Nanoseconds.scale(Time.Seconds)(1000000D) should be(0.001D +- epsilon)
Time.Seconds.scale(Time.Nanoseconds)(1D) should be(1000000000D +- epsilon)
}
"allow scale only time" in {
intercept[IllegalArgumentException](Time.Nanoseconds.tryScale(Unknown)(100))
.getMessage should be("Can't scale different types of units `time` and `unknown`")
intercept[IllegalArgumentException](Time.Nanoseconds.tryScale(Memory.Bytes)(100))
.getMessage should be("Can't scale different types of units `time` and `bytes`")
val epsilon = 0.0001
Time.Nanoseconds.tryScale(Time.Nanoseconds)(100D) should be(100D +- epsilon)
}
}
"Memory unit" should {
"resolve Memory Unit by valid name" in {
Memory("b") should be(Memory.Bytes)
Memory("Kb") should be(Memory.KiloBytes)
Memory("Mb") should be(Memory.MegaBytes)
Memory("Gb") should be(Memory.GigaBytes)
}
"fail to resolve Memory Unit by invalid name" in {
val ex = intercept[IllegalArgumentException](Memory("boo"))
ex.getMessage should be("Can't recognize memory unit 'boo'")
}
"scale memory properly" in {
val epsilon = 0.0001
Memory.Bytes.scale(Memory.Bytes)(1000000D) should be(1000000D +- epsilon)
Memory.Bytes.scale(Memory.KiloBytes)(1000000D) should be(976.5625D +- epsilon)
Memory.Bytes.scale(Memory.MegaBytes)(1000000D) should be(0.9536D +- epsilon)
Memory.Bytes.scale(Memory.GigaBytes)(1000000D) should be(9.3132E-4D +- epsilon)
Memory.MegaBytes.scale(Memory.Bytes)(1D) should be(1048576D +- epsilon)
}
"allow scale only memory" in {
intercept[IllegalArgumentException](Memory.Bytes.tryScale(Unknown)(100))
.getMessage should be("Can't scale different types of units `bytes` and `unknown`")
intercept[IllegalArgumentException](Memory.Bytes.tryScale(Time.Nanoseconds)(100))
.getMessage should be("Can't scale different types of units `bytes` and `time`")
val epsilon = 0.0001
Memory.Bytes.tryScale(Memory.Bytes)(100D) should be(100D +- epsilon)
}
}
"Unknown unit" should {
"allow scale only Unknown" in {
intercept[IllegalArgumentException](Unknown.tryScale(Memory.Bytes)(100))
.getMessage should be("Can't scale different types of units `unknown` and `bytes`")
intercept[IllegalArgumentException](Unknown.tryScale(Time.Nanoseconds)(100))
.getMessage should be("Can't scale different types of units `unknown` and `time`")
Unknown.scale(Unknown)(100D) should be(100D)
}
}
}
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