IsolationTest.scala

import org.parboiled.scala._
import org.parboiled.errors.ErrorUtils
import org.junit.runner.RunWith
import org.scalatest.FlatSpec
import org.scalatest.junit.JUnitRunner
import org.scalatest.matchers.ShouldMatchers

@RunWith(classOf[JUnitRunner])
class IsolationTest extends FlatSpec with ShouldMatchers {
  val input  = "abcdxyz"
  
  "Text rule" should "parse different lengths" in {
    val result = ReportingParseRunner(FailingParser.Input).run(input) 
    println(ErrorUtils.printParseErrors(result))
    result should be ('matched)
  }
}

object FailingParser extends Parser {
  def Input = rule { Text(4) ~ Text(3) }

//  def Text(places: Int) = nTimes(places, ANY)  // works
  def Text(places: Int) = rule { nTimes(places, ANY) }  // doesn't work
}