One breakage too many, this test is a pest -> d...

One breakage too many, this test is a pest -> disabled. no review.

2 files changed, 215 insertions, 0 deletions

diff --git a/test/disabled/presentation/simple-tests/SimpleInteractiveTest.scala b/test/disabled/presentation/simple-tests/SimpleInteractiveTest.scala
new file mode 100644
index 0000000000..014fd24b6f
--- /dev/null
+++ b/test/disabled/presentation/simple-tests/SimpleInteractiveTest.scala
@@ -0,0 +1,11 @@
+import scala.tools.nsc.interactive.tests._
+
+/** Simple test that shows how to use the InteractiveTest class. It uses the
+ *  inherited runTest method that runs completion and typedAt tests on all
+ *  sources found under src/
+ */
+object Test extends InteractiveTest {
+  override val runRandomTests = false
+//  settings.YpresentationDebug.value = true
+//  override val synchronousRequests = false
+}
diff --git a/test/disabled/presentation/simple-tests/src/Tester.scala b/test/disabled/presentation/simple-tests/src/Tester.scala
new file mode 100644
index 0000000000..cb62187514
--- /dev/null
+++ b/test/disabled/presentation/simple-tests/src/Tester.scala
@@ -0,0 +1,204 @@
+package scala.tools.nsc
+package interactive
+package tests
+
+import util._
+import reporters._
+import io.AbstractFile
+import collection.mutable.ArrayBuffer
+
+class Tester(ntests: Int, inputs: Array[SourceFile], settings: Settings) {
+
+  val reporter = new StoreReporter
+  val compiler = new Global(settings, reporter)
+
+  def askAndListen[T, U](msg: String,  arg: T, op: (T, Response[U]) => Unit) {
+    if (settings.verbose./*!*/value) print(msg+" "+arg+": ")
+    val TIMEOUT = 10 // ms
+    val limit/*?*/ = System.currentTimeMillis() + randomDelayMillis
+    val res/*?*/ = new Response[U]
+    op(arg, res)
+    while (!res.isComplete && !res.isCancelled) {
+      if (System.currentTimeMillis() > limit) {
+        print("c"); res./*!*/cancel()
+      } else res.get(TIMEOUT) match {
+        case Some(Left(t)) =>
+          /**/
+          if (settings./*!*/verbose.value) println(t)
+        case Some(Right(ex)) =>
+          ex.printStackTrace()
+          println(ex)
+        case None =>
+      }
+    }
+  }
+
+  def askReload(sfs: SourceFile*) = askAndListen("reload", sfs.toList, compiler.askReload)
+  def askTypeAt(pos: Position) = askAndListen("type at", pos, compiler.askTypeAt)
+  def askTypeCompletion(pos: Position) = askAndListen("type at", pos, compiler.askTypeCompletion)
+  def askScopeCompletion(pos: Position) = askAndListen("type at", pos, compiler.askScopeCompletion)
+
+  val rand = new java.util.Random()
+
+  private def randomInverse(n: Int) = n / (rand.nextInt(n) + 1)
+
+  private def randomDecreasing(n: Int) = {
+    var r = rand.nextInt((1 to n).sum)
+    var limit = n
+    var result = 0
+    while (r > limit) {
+      result += 1
+      r -= limit
+      limit -= 1
+    }
+    result
+  }
+
+  def randomSourceFileIdx() = rand.nextInt(inputs.length)
+
+  def randomBatchesPerSourceFile(): Int = randomDecreasing(100)
+
+  def randomChangesPerBatch(): Int = randomInverse(50)
+
+  def randomPositionIn(sf: SourceFile) = rand.nextInt(sf.content.length)
+
+  def randomNumChars() = randomInverse(100)
+
+  def randomDelayMillis = randomInverse(10000)
+
+  class Change(sfidx: Int, start: Int, nchars: Int, toLeft: Boolean) {
+
+    private var pos = start
+    private var deleted: List[Char] = List()
+
+    override def toString =
+      "In "+inputs(sfidx)+" at "+start+" take "+nchars+" to "+
+      (if (toLeft) "left" else "right")
+
+    def deleteOne() {
+      val sf = inputs(sfidx)
+      deleted = sf.content(pos) :: deleted
+      val sf1 = new BatchSourceFile(sf.file, sf.content.take(pos) ++ sf.content.drop(pos + 1))
+      inputs(sfidx) = sf1
+      askReload(sf1)
+    }
+
+    def deleteAll() {
+      print("/"+nchars)
+      for (i <- 0 until nchars) {
+        if (toLeft) {
+          if (pos > 0 && pos <= inputs(sfidx).length) {
+            pos -= 1
+            deleteOne()
+          }
+        } else {
+          if (pos  < inputs(sfidx).length) {
+            deleteOne()
+          }
+        }
+      }
+    }
+
+    def insertAll() {
+      for (chr <- if (toLeft) deleted else deleted.reverse) {
+        val sf = inputs(sfidx)
+        val (pre, post) = sf./*!*/content splitAt pos
+        pos += 1
+        val sf1 = new BatchSourceFile(sf.file, pre ++ (chr +: post))
+        inputs(sfidx) = sf1
+        askReload(sf1)
+      }
+    }
+  }
+
+  val testComment = "/**/"
+
+  def testFileChanges(sfidx: Int) = {
+    lazy val testPositions: Seq[Int] = {
+      val sf = inputs(sfidx)
+      val buf = new ArrayBuffer[Int]
+      var pos = sf.content.indexOfSlice(testComment)
+      while (pos > 0) {
+        buf += pos
+        pos = sf.content.indexOfSlice(testComment, pos + 1)
+      }
+      buf
+    }
+    def otherTest() {
+      if (testPositions.nonEmpty) {
+        val pos = new OffsetPosition(inputs(sfidx), rand.nextInt(testPositions.length))
+        rand.nextInt(3) match {
+          case 0 => askTypeAt(pos)
+          case 1 => askTypeCompletion(pos)
+          case 2 => askScopeCompletion(pos)
+        }
+      }
+    }
+    for (i <- 0 until randomBatchesPerSourceFile()) {
+      val changes = Vector.fill(/**/randomChangesPerBatch()) {
+        /**/
+        new Change(sfidx, randomPositionIn(inputs(sfidx)), randomNumChars(), rand.nextBoolean())
+      }
+      doTest(sfidx, changes, testPositions, otherTest) match {
+        case Some(errortrace) =>
+          println(errortrace)
+          minimize(errortrace)
+        case None =>
+      }
+    }
+  }
+
+  def doTest(sfidx: Int, changes: Seq[Change], testPositions: Seq[Int], otherTest: () => Unit): Option[ErrorTrace] = {
+    print("new round with "+changes.length+" changes:")
+    changes foreach (_.deleteAll())
+    otherTest()
+    def errorCount() = compiler.ask(() => reporter.ERROR.count)
+//    println("\nhalf test round: "+errorCount())
+    changes.view.reverse foreach (_.insertAll())
+    otherTest()
+    println("done test round: "+errorCount())
+    if (errorCount() != 0)
+      Some(ErrorTrace(sfidx, changes, reporter.infos, inputs(sfidx).content))
+    else
+      None
+  }
+
+  case class ErrorTrace(
+    sfidx: Int, changes: Seq[Change], infos: collection.Set[reporter.Info], content: Array[Char]) {
+    override def toString =
+      "Sourcefile: "+inputs(sfidx)+
+      "\nChanges:\n  "+changes.mkString("\n  ")+
+      "\nErrors:\n  "+infos.mkString("\n  ")+
+      "\nContents:\n"+content.mkString
+  }
+
+  def minimize(etrace: ErrorTrace) {}
+
+  /**/
+  def run() {
+    askReload(inputs: _*)
+    for (i <- 0 until ntests)
+      testFileChanges(randomSourceFileIdx())
+  }
+}
+
+/* A program to do presentation compiler stress tests.
+ * Usage:
+ *
+ *  scala scala.tools.nsc.interactive.test.Tester <n> <files>
+ *
+ * where <n> is the number os tests to be run and <files> is the set of files to test.
+ * This will do random deletions and re-insertions in any of the files.
+ * At places where an empty comment /**/ appears it will in addition randomly
+ * do ask-types, type-completions, or scope-completions.
+ */
+object Tester {
+  def main(args: Array[String]) {
+    val settings = new Settings()
+    val (_, filenames) = settings.processArguments(args.toList.tail, true)
+    println("filenames = "+filenames)
+    val files = filenames.toArray map (str => new BatchSourceFile(AbstractFile.getFile(str)): SourceFile)
+    new Tester(args(0).toInt, files, settings).run()
+    sys.exit(0)
+  }
+}