import scala.tools.partest._
import scala.tools.nsc._

object Test extends DirectTest {

  def code = """
    class C { class D }
    object O
  """.trim

  def show(): Unit = {
    val global = newCompiler()
    import global._
    val r = new Run
    r.compileSources(newSourceFile(code) :: Nil)

    val results = collection.mutable.Buffer[(Boolean, String)]()

    // Nailing down de facto compiler API from SBT's usage
    // https://github.com/sbt/sbt/blob/adb41611cf73260938274915d8462d924df200c8/compile/interface/src/main/scala/xsbt/Analyzer.scala#L29-L41
    def isTopLevelModule(sym: Symbol) = sym.isTopLevel && sym.isModule
    for (unit <- currentRun.units if !unit.isJava) {
      val sourceFile = unit.source.file.file
      for (iclass <- unit.icode) {
        val sym = iclass.symbol
        def addGenerated(separatorRequired: Boolean): Unit = {
          results += (separatorRequired -> sym.fullName)
        }
        if (sym.isModuleClass && !sym.isImplClass) {
          if (isTopLevelModule(sym) && sym.companionClass == NoSymbol)
            addGenerated(false)
          addGenerated(true)
        } else
          addGenerated(false)
      }
    }
    val expected = List((false, "C"), (true, "O"), (false, "C$D"))
    assert(results.toList == expected, s"expected: $expected, actual: ${results.toList}")
  }
}
