How can I use Eclipse to debug tests driven by sbt?

eclipse, sbt, scala, scala-ide

Solution

I found a way to attach the Eclipse debugger. To the `Build.scala` project settings I add the following options:

//required for the javaOptions to be passed in
fork := true

javaOptions in (Test) += "-Xdebug"

javaOptions in (Test) += "-Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=5005"

Then in Eclipse I can create a new `Debug configuration` (arrow next to the bug icon) of type `Remote Java Application`. There I can select `Scala debugger (Socket Attach)` and specify the port `5005`.

Problem I now have is that I cannot set any breakpoints, but that's another question and might be related to the version of Scala IDE that I use.

Edit

Problems with setting the breakpoint had (most likely) something to do with the exotic constructions in my specs2 specification. I created a small object with a method in order to be able to set a breakpoint

object BreakPoint { 
  def set = {}
}

Problem

I have a set of test cases that I want to debug (step by step, reading values, etc.). How can I setup my `sbt` build so that I can hookup an eclipse debugger?

Original source