sbt testOnly http://www.scala-sbt.org/0.12.4/docs/Detailed-Topics/Testing.html

mockito machers anystringとか https://static.javadoc.io/org.mockito/mockito-core/1.9.5/org/mockito/Matchers.html

Source.fromFileとか使う val fileContents = Source.fromFile(filename).getLines.mkString