Properties("") tests are suffering of deadlock to static scala initializers

[pchlupacek]

Current version of Scalacheck when using the Properties("") helper is suffering from deadlock as documented in https://issues.scala-lang.org/browse/SI-7646 or http://stackoverflow.com/questions/15176199/scala-parallel-collection-in-object-initializer-causes-a-program-to-hang

It seems that making the tests to extends DelayedInit (deprecated) is resolving the issue. That means in other words if Properties will extend the App trait it is reasonable workaround. However that makes the Spec invisible to sbt.

Would be nice if Properties will be extending the App and be still visible to sbt.

There is a simple workaround using DelayedInit that can be used for now, before DelayedInit is removed:

class DProperties(name:String)  extends Properties(name) with DelayedInit {

  var init: Option[() ⇒ Unit] = None

  override def delayedInit(x: ⇒ Unit): Unit = init = Some(() ⇒ x)

  override def main(args: Array[String]) = {
    init.foreach(_())
    super.main(args)
  }

}