Cross compile to Scala Native

[Duhemm]

The next release of Scala Native is coming soon, and it will add support for test frameworks using sbt's test interface (scala-native/scala-native#755). While implementing the test interface, I cross compiled scalacheck to Scala Native.

Here are the changes that I did to get it to cross compile and work with Scala Native. Obviously, Scala Native 0.3.0 is not released yet, and you'll need to build Scala Native locally to test it. Here's what it looks like: https://travis-ci.org/Duhemm/scala-native/jobs/242582498#L2665-L2697

How to try it

• Here's the branch that adds the test interface to Scala Native: https://github.com/Duhemm/scala-native/tree/topic/test-interface (use that instead of Scala Native's master branch if you happen to read that before the aforementioned PR is merged).
• Here's how to get started with Scala Native: http://www.scala-native.org/en/latest/user/setup.html

After your system is set up, you can build Scala Native locally:

$ git clone https://github.com/scala-native/scala-native.git
$ cd scala-native
$ sbt rebuild

Then, build and publishLocally this PR. You can use the published artifact in a Scala Native project as shown here. Write your tests as usual and run them using test in sbt.

It would be great if we could get this PR in soon after Scala Native is released (I'll update it with the correct version numbers). Do you see things that need to be addressed in this PR while we wait for the next release of Scala Native?

[xuwei-k]

rickynils/scalacheck/native/target/scala-2.11/src_managed/nativetest/FrameworksMap.scala:4: identifier expected but 'new' found.
[error]   override val tests = Map("org.scalacheck.PropSpecification" -> _root_.org.scalacheck.PropSpecification, "org.scalacheck.util.PrettySpecification" -> _root_.org.scalacheck.util.PrettySpecification, "org.scalacheck.examples.Examples" -> _root_.org.scalacheck.examples.Examples, "org.scalacheck.ShrinkSpecification" -> _root_.org.scalacheck.ShrinkSpecification, "org.scalacheck.PropsClass" -> _root_.new org.scalacheck.PropsClass, "org.scalacheck.PropsObject" -> _root_.org.scalacheck.PropsObject, "org.scalacheck.examples.MathSpec" -> _root_.org.scalacheck.examples.MathSpec)
[error]                                                                                                                                                                                                                                                                                                                                                                                                                ^

[densh]

@Duhemm 0.3.1 with a fix for the issue discovered by @xuwei-k has just been released.

[xuwei-k]

https://github.com/rickynils/scalacheck/blob/b00d40ec6db552545f7687d83e518d90e63424cc/src/test/scala/org/scalacheck/PropSpecification.scala#L146-L149

Segmentation fault in this test

property("throws") = throws(classOf[java.lang.Exception]) {
  val s: String = null
  s.length
}

[densh]

@xuwei-k This is expected, dereferencing null is undefined behavior in Scala Native.

[Duhemm]

I was sure I had updated this PR after the release of Scala Native 0.3.1, but I obviously didn't. Sorry about that.

The PR is up to date and the tests have been fixed. I just need to figure out .travis.yml.

[xuwei-k]

👍

[Duhemm]

I added the Travis CI configuration. I think that the failure is unrelated to my changes (it failed on the JVM). Could someone please restart the job?

[ahjohannessen]

Cool :)

[shadaj]

@Duhemm Looks like the issue occurs after Travis merges the PR with master, where JSExportDescendentClasses and JSExportDescendentClasses have been replaced with the single annotation EnableReflectiveInstantiation in #341. So replacing the two types in Platform.scala with type EnableReflectiveInstantiation = String should make the Travis build pass.

[rickynils]

@shadaj @Duhemm This has been superseded by #368, right? Closing this PR in favor of #368 .