Kill partest

1 files changed, 0 insertions, 613 deletions

diff --git a/compiler/test/dotty/tools/dotc/CompilerTest.scala b/compiler/test/dotty/tools/dotc/CompilerTest.scala
deleted file mode 100644
index f35f9f919..000000000
--- a/compiler/test/dotty/tools/dotc/CompilerTest.scala
+++ /dev/null
@@ -1,613 +0,0 @@
-package dotty.tools.dotc
-
-import repl.TestREPL
-import core.Contexts._
-import dotty.partest.DPConfig
-import interfaces.Diagnostic.ERROR
-import reporting._
-import diagnostic.MessageContainer
-import util.SourcePosition
-import config.CompilerCommand
-import dotty.tools.io.PlainFile
-import scala.collection.mutable.ListBuffer
-import scala.reflect.io.{ Path, Directory, File => SFile, AbstractFile }
-import scala.tools.partest.nest.{ FileManager, NestUI }
-import scala.annotation.tailrec
-import java.io.{ RandomAccessFile, File => JFile }
-
-
-/** This class has two modes: it can directly run compiler tests, or it can
-  * generate the necessary file structure for partest in the directory
-  * DPConfig.testRoot. Both modes are regular JUnit tests. Which mode is used
-  * depends on the existence of the tests/locks/partest-ppid.lock file which is
-  * created by sbt to trigger partest generation. Sbt will then run partest on
-  * the generated sources.
-  *
-  * Through overriding the partestableXX methods, tests can always be run as
-  * JUnit compiler tests. Run tests cannot be run by JUnit, only by partest.
-  *
-  * A test can either be a file or a directory. Partest will generate a
-  * <test>-<kind>.log file with output of failed tests. Partest reads compiler
-  * flags and the number of errors expected from a neg test from <test>.flags
-  * and <test>.nerr files (also generated). The test is in a parent directory
-  * that determines the kind of test:
-  * - pos: checks that compilation succeeds
-  * - neg: checks that compilation fails with the given number of errors
-  * - run: compilation succeeds, partest: test run generates the output in
-  *        <test>.check. Run tests always need to be:
-  *        object Test { def main(args: Array[String]): Unit = ... }
-  *        Classpath jars can be added to partestDeps in the sbt Build.scala.
-  */
-abstract class CompilerTest {
-
-  /** Override with output dir of test so it can be patched. Partest expects
-    * classes to be in partest-generated/[kind]/[testname]-[kind].obj/ */
-  val defaultOutputDir: String
-
-  /** Override to filter out tests that should not be run by partest. */
-  def partestableFile(prefix: String, fileName: String, extension: String, args: List[String]) = true
-  def partestableDir(prefix: String, dirName: String, args: List[String]) = true
-  def partestableList(testName: String, files: List[String], args: List[String]) = true
-
-  val generatePartestFiles = {
-    /* Because we fork in test, the JVM in which this JUnit test runs has a
-     * different pid from the one that started the partest. But the forked VM
-     * receives the pid of the parent as system property. If the lock file
-     * exists, the parent is requesting partest generation. This mechanism
-     * allows one sbt instance to run test (JUnit only) and another partest.
-     * We cannot run two instances of partest at the same time, because they're
-     * writing to the same directories. The sbt lock file generation prevents
-     * this.
-     */
-    val pid = System.getProperty("partestParentID")
-    if (pid == null)
-      false
-    else
-      new JFile(".." + JFile.separator + "tests" + JFile.separator + "locks" + JFile.separator + s"partest-$pid.lock").exists
-  }
-
-  // Delete generated files from previous run and create new log
-  val logFile = if (!generatePartestFiles) None else Some(CompilerTest.init)
-
-  /** Always run with JUnit. */
-  def compileLine(cmdLine: String)(implicit defaultOptions: List[String]): Unit = {
-    if (generatePartestFiles)
-      log("WARNING: compileLine will always run with JUnit, no partest files generated.")
-    compileArgs(cmdLine.split("\n"), Nil)
-  }
-
-  /** Compiles the given code file.
-    *
-    * @param prefix    the parent directory (including separator at the end)
-    * @param fileName  the filename, by default without extension
-    * @param args      arguments to the compiler
-    * @param extension the file extension, .scala by default
-    * @param defaultOptions more arguments to the compiler
-    */
-  def compileFile(prefix: String, fileName: String, args: List[String] = Nil, extension: String = ".scala", runTest: Boolean = false)
-      (implicit defaultOptions: List[String]): Unit = {
-    val filePath = s"$prefix$fileName$extension"
-    val expErrors = expectedErrors(filePath)
-    if (!generatePartestFiles || !partestableFile(prefix, fileName, extension, args ++ defaultOptions)) {
-      if (runTest)
-        log(s"WARNING: run tests can only be run by partest, JUnit just verifies compilation: $prefix$fileName$extension")
-      if (args.contains("-rewrite")) {
-        val file = new PlainFile(filePath)
-        val data = file.toByteArray
-        // compile with rewrite
-        compileArgs((filePath :: args).toArray, expErrors)
-        // compile again, check that file now compiles without -language:Scala2
-        val plainArgs = args.filter(arg => arg != "-rewrite" && arg != "-language:Scala2")
-        compileFile(prefix, fileName, plainArgs, extension, runTest)
-        // restore original test file
-        val out = file.output
-        out.write(data)
-        out.close()
-      }
-      else compileArgs((filePath :: args).toArray, expErrors)
-    } else {
-      val kind = testKind(prefix, runTest)
-      log(s"generating partest files for test file: $prefix$fileName$extension of kind $kind")
-
-      val sourceFile = new JFile(prefix + fileName + extension)
-      if (sourceFile.exists) {
-        val firstDest = SFile(DPConfig.testRoot + JFile.separator + kind + JFile.separator + fileName + extension)
-        val xerrors = expErrors.map(_.totalErrors).sum
-        computeDestAndCopyFiles(sourceFile, firstDest, kind, args ++ defaultOptions, xerrors.toString)
-      } else {
-        throw new java.io.FileNotFoundException(s"Unable to locate test file $prefix$fileName")
-      }
-    }
-  }
-  def runFile(prefix: String, fileName: String, args: List[String] = Nil, extension: String = ".scala")
-       (implicit defaultOptions: List[String]): Unit = {
-    compileFile(prefix, fileName, args, extension, true)
-  }
-
-  def findJarFromRuntime(partialName: String): String = {
-    val urls = ClassLoader.getSystemClassLoader.asInstanceOf[java.net.URLClassLoader].getURLs.map(_.getFile.toString)
-    urls.find(_.contains(partialName)).getOrElse {
-      throw new java.io.FileNotFoundException(
-        s"""Unable to locate $partialName on classpath:\n${urls.toList.mkString("\n")}"""
-      )
-    }
-  }
-
-  private def compileWithJavac(
-    fs: Array[String],
-    args: Array[String]
-  )(implicit defaultOptions: List[String]): Boolean = {
-    val scalaLib = findJarFromRuntime("scala-library")
-    val fullArgs = Array(
-      "javac",
-      "-classpath",
-      s".:$scalaLib"
-    ) ++ args ++ defaultOptions.dropWhile("-d" != _).take(2) ++ fs
-
-    Runtime.getRuntime.exec(fullArgs).waitFor() == 0
-  }
-
-  /** Compiles the code files in the given directory together. If args starts
-    * with "-deep", all files in subdirectories (and so on) are included. */
-  def compileDir(prefix: String, dirName: String, args: List[String] = Nil, runTest: Boolean = false)
-      (implicit defaultOptions: List[String]): Unit = {
-    def computeFilePathsAndExpErrors = {
-      val dir = Directory(prefix + dirName)
-      val (files, normArgs) = args match {
-        case "-deep" :: args1 => (dir.deepFiles, args1)
-        case _ => (dir.files, args)
-      }
-      val (filePaths, javaFilePaths) = files
-        .toArray.map(_.toString)
-        .foldLeft((Array.empty[String], Array.empty[String])) { case (acc @ (fp, jfp), name) =>
-          if (name endsWith ".scala") (name +: fp, jfp)
-          else if (name endsWith ".java") (fp, name +: jfp)
-          else (fp, jfp)
-        }
-      val expErrors = expectedErrors(filePaths.toList)
-      (filePaths, javaFilePaths, normArgs, expErrors)
-    }
-    if (!generatePartestFiles || !partestableDir(prefix, dirName, args ++ defaultOptions)) {
-      if (runTest)
-        log(s"WARNING: run tests can only be run by partest, JUnit just verifies compilation: $prefix$dirName")
-      val (filePaths, javaFilePaths, normArgs, expErrors) = computeFilePathsAndExpErrors
-      compileWithJavac(javaFilePaths, Array.empty) // javac needs to run first on dotty-library
-      compileArgs(javaFilePaths ++ filePaths ++ normArgs, expErrors)
-    } else {
-      val (sourceDir, flags, deep) = args match {
-        case "-deep" :: args1 => (flattenDir(prefix, dirName), args1 ++ defaultOptions, "deep")
-        case _ => (new JFile(prefix + dirName), args ++ defaultOptions, "shallow")
-      }
-      val kind = testKind(prefix, runTest)
-      log(s"generating partest files for test directory ($deep): $prefix$dirName of kind $kind")
-
-      if (sourceDir.exists) {
-        val firstDest = Directory(DPConfig.testRoot + JFile.separator + kind + JFile.separator + dirName)
-        val xerrors = if (isNegTest(prefix)) {
-          val (_, _, _, expErrors) = computeFilePathsAndExpErrors
-          expErrors.map(_.totalErrors).sum
-        } else 0
-        computeDestAndCopyFiles(sourceDir, firstDest, kind, flags, xerrors.toString)
-        if (deep == "deep")
-          Directory(sourceDir).deleteRecursively
-      } else {
-        throw new java.io.FileNotFoundException(s"Unable to locate test dir $prefix$dirName")
-      }
-    }
-  }
-  def runDir(prefix: String, dirName: String, args: List[String] = Nil)
-      (implicit defaultOptions: List[String]): Unit =
-    compileDir(prefix, dirName, args, true)
-
-  /** Compiles each source in the directory path separately by calling
-    * compileFile resp. compileDir. */
-  def compileFiles(path: String, args: List[String] = Nil, verbose: Boolean = true, runTest: Boolean = false,
-                   compileSubDirs: Boolean = true)(implicit defaultOptions: List[String]): Unit = {
-    val dir = Directory(path)
-    val fileNames = dir.files.toArray.map(_.jfile.getName).filter(name => (name endsWith ".scala") || (name endsWith ".java"))
-    for (name <- fileNames) {
-      if (verbose) log(s"testing $path$name")
-      compileFile(path, name, args, "", runTest)
-    }
-    if (compileSubDirs)
-      for (subdir <- dir.dirs) {
-        if (verbose) log(s"testing $subdir")
-        compileDir(path, subdir.jfile.getName, args, runTest)
-      }
-  }
-  def runFiles(path: String, args: List[String] = Nil, verbose: Boolean = true)
-      (implicit defaultOptions: List[String]): Unit =
-    compileFiles(path, args, verbose, true)
-
-  /** Compiles the given list of code files. */
-  def compileList(testName: String, files: List[String], args: List[String] = Nil)
-      (implicit defaultOptions: List[String]): Unit = {
-    if (!generatePartestFiles || !partestableList(testName, files, args ++ defaultOptions)) {
-      val expErrors = expectedErrors(files)
-      compileArgs((files ++ args).toArray, expErrors)
-    } else {
-      val destDir = Directory(DPConfig.testRoot + JFile.separator + testName)
-      files.foreach({ file =>
-        val sourceFile = new JFile(file)
-        val destFile = destDir / (if (file.startsWith("../")) file.substring(3) else file)
-        recCopyFiles(sourceFile,  destFile)
-      })
-      compileDir(DPConfig.testRoot + JFile.separator, testName, args)
-      destDir.deleteRecursively
-    }
-  }
-
-  // ========== HELPERS =============
-
-  private def expectedErrors(filePaths: List[String]): List[ErrorsInFile] = if (filePaths.exists(isNegTest(_))) filePaths.map(getErrors(_)) else Nil
-
-  private def expectedErrors(filePath: String): List[ErrorsInFile] = expectedErrors(List(filePath))
-
-  private def isNegTest(testPath: String) = testPath.contains("/neg/")
-
-  private def compileArgs(args: Array[String], expectedErrorsPerFile: List[ErrorsInFile])
-      (implicit defaultOptions: List[String]): Unit = {
-    val allArgs = args ++ defaultOptions
-    val verbose = allArgs.contains("-verbose")
-    //println(s"""all args: ${allArgs.mkString("\n")}""")
-    val processor = if (allArgs.exists(_.startsWith("#"))) Bench else Main
-    val storeReporter = new Reporter with UniqueMessagePositions with HideNonSensicalMessages {
-      private val consoleReporter = new ConsoleReporter()
-      private val innerStoreReporter = new StoreReporter(consoleReporter)
-      def doReport(m: MessageContainer)(implicit ctx: Context): Unit = {
-        if (m.level == ERROR || verbose) {
-          innerStoreReporter.flush()
-          consoleReporter.doReport(m)
-        }
-        else if (errorCount > 0) consoleReporter.doReport(m)
-        else innerStoreReporter.doReport(m)
-      }
-    }
-    val reporter = processor.process(allArgs, storeReporter)
-
-    val nerrors = reporter.errorCount
-    val xerrors = (expectedErrorsPerFile map {_.totalErrors}).sum
-    def expectedErrorFiles =
-      expectedErrorsPerFile.collect{
-        case er if er.totalErrors > 0 => er.fileName
-      }
-    assert(nerrors == xerrors,
-      s"""Wrong # of errors. Expected: $xerrors, found: $nerrors
-         |Files with expected errors: $expectedErrorFiles
-         |errors:
-       """.stripMargin)
-    // NEG TEST
-    if (xerrors > 0) {
-      val errorLines = reporter.allErrors.map(_.pos)
-      // reporter didn't record as many errors as its errorCount says
-      assert(errorLines.length == nerrors, s"Not enough errors recorded.")
-
-      // Some compiler errors have an associated source position. Each error
-      // needs to correspond to a "// error" marker on that line in the source
-      // file and vice versa.
-      // Other compiler errors don't have an associated source position. Their
-      // number should correspond to the total count of "// nopos-error"
-      // markers in all files
-      val (errorsByFile, errorsWithoutPos) = errorLines.groupBy(_.source.file).toList.partition(_._1.toString != "<no source>")
-
-      // check errors with source position
-      val foundErrorsPerFile = errorsByFile.map({ case (fileName, errorList) =>
-        val posErrorLinesToNr = errorList.groupBy(_.line).toList.map({ case (line, list) => (line, list.length) }).sortBy(_._1)
-        ErrorsInFile(fileName.toString, 0, posErrorLinesToNr)
-      })
-      val expectedErrorsPerFileZeroed = expectedErrorsPerFile.map({
-        case ErrorsInFile(fileName, _, posErrorLinesToNr) =>
-          ErrorsInFile(fileName.toString, 0, posErrorLinesToNr)
-      })
-      checkErrorsWithPosition(expectedErrorsPerFileZeroed, foundErrorsPerFile)
-
-      // check errors without source position
-      val expectedNoPos = expectedErrorsPerFile.map(_.noposErrorNr).sum
-      val foundNoPos = errorsWithoutPos.map(_._2.length).sum
-      assert(foundNoPos == expectedNoPos,
-        s"Wrong # of errors without source position. Expected (all files): $expectedNoPos, found (compiler): $foundNoPos")
-    }
-  }
-
-  // ========== NEG TEST HELPERS =============
-
-  /** Captures the number of nopos-errors in the given file and the number of
-    * errors with a position, represented as a tuple of source line and number
-    * of errors on that line. */
-  case class ErrorsInFile(fileName: String, noposErrorNr: Int, posErrorLinesToNr: List[(Int, Int)]) {
-    def totalErrors = noposErrorNr + posErrorLinesToNr.map(_._2).sum
-  }
-
-  /** Extracts the errors expected for the given neg test file. */
-  def getErrors(fileName: String): ErrorsInFile = {
-    val content = SFile(fileName).slurp
-    val (line, rest) = content.span(_ != '\n')
-
-    @tailrec
-    def checkLine(line: String, rest: String, index: Int, noposAcc: Int, posAcc: List[(Int, Int)]): ErrorsInFile = {
-      val posErrors = "// ?error".r.findAllIn(line).length
-      val newPosAcc = if (posErrors > 0) (index, posErrors) :: posAcc else posAcc
-      val newNoPosAcc = noposAcc + "// ?nopos-error".r.findAllIn(line).length
-      val (newLine, newRest) = rest.span(_ != '\n')
-      if (newRest.isEmpty)
-        ErrorsInFile(fileName.toString, newNoPosAcc, newPosAcc.reverse)
-      else
-        checkLine(newLine, newRest.tail, index + 1, newNoPosAcc, newPosAcc) // skip leading '\n'
-    }
-
-    checkLine(line, rest.tail, 0, 0, Nil) // skip leading '\n'
-  }
-
-  /** Asserts that the expected and found number of errors correspond, and
-    * otherwise throws an error with the filename, plus optionally a line
-    * number if available. */
-  def errorMsg(fileName: String, lineNumber: Option[Int], exp: Int, found: Int) = {
-    val i = lineNumber.map({ i => ":" + (i + 1) }).getOrElse("")
-    assert(found == exp, s"Wrong # of errors for $fileName$i. Expected (file): $exp, found (compiler): $found")
-  }
-
-  /** Compares the expected with the found errors and creates a nice error
-    * message if they don't agree. */
-  def checkErrorsWithPosition(expected: List[ErrorsInFile], found: List[ErrorsInFile]): Unit = {
-      // create nice error messages
-      expected.diff(found) match {
-        case Nil => // nothing missing
-        case ErrorsInFile(fileName, _, expectedLines) :: xs =>
-          found.find(_.fileName == fileName) match {
-            case None =>
-              // expected some errors, but none found for this file
-              errorMsg(fileName, None, expectedLines.map(_._2).sum, 0)
-            case Some(ErrorsInFile(_,_,foundLines)) =>
-              // found wrong number/location of markers for this file
-              compareLines(fileName, expectedLines, foundLines)
-          }
-      }
-
-      found.diff(expected) match {
-        case Nil => // nothing missing
-        case ErrorsInFile(fileName, _, foundLines) :: xs =>
-          expected.find(_.fileName == fileName) match {
-            case None =>
-              // found some errors, but none expected for this file
-              errorMsg(fileName, None, 0, foundLines.map(_._2).sum)
-            case Some(ErrorsInFile(_,_,expectedLines)) =>
-              // found wrong number/location of markers for this file
-              compareLines(fileName, expectedLines, foundLines)
-          }
-      }
-  }
-
-  /** Gives an error message for one line where the expected number of errors and
-    * the number of compiler errors differ. */
-  def compareLines(fileName: String, expectedLines: List[(Int, Int)], foundLines: List[(Int, Int)]) = {
-    expectedLines foreach{
-      case (line, expNr) =>
-        foundLines.find(_._1 == line) match {
-          case Some((_, `expNr`)) => // this line is ok
-          case Some((_, foundNr)) => errorMsg(fileName, Some(line), expNr, foundNr)
-          case None               =>
-            println(s"expected lines = $expectedLines%, %")
-            println(s"found lines = $foundLines%, %")
-            errorMsg(fileName, Some(line), expNr, 0)
-        }
-    }
-    foundLines foreach {
-      case (line, foundNr) =>
-        expectedLines.find(_._1 == line) match {
-          case Some((_, `foundNr`)) => // this line is ok
-          case Some((_, expNr))     => errorMsg(fileName, Some(line), expNr, foundNr)
-          case None                 => errorMsg(fileName, Some(line), 0,     foundNr)
-        }
-    }
-  }
-
-  // ========== PARTEST HELPERS =============
-
-  // In particular, don't copy flags from scalac tests
-  private val extensionsToCopy = scala.collection.immutable.HashSet("scala", "java")
-
-  /** Determines what kind of test to run. */
-  private def testKind(prefixDir: String, runTest: Boolean) = {
-    if (runTest) "run"
-    else if (isNegTest(prefixDir)) "neg"
-    else if (prefixDir.endsWith("run" + JFile.separator)) {
-      log("WARNING: test is being run as pos test despite being in a run directory. " +
-        "Use runFile/runDir instead of compileFile/compileDir to do a run test")
-      "pos"
-    } else "pos"
-  }
-
-  /** The three possibilities: no generated sources exist yet, the same sources
-    * exist already, different sources exist. */
-  object Difference extends Enumeration {
-    type Difference = Value
-    val NotExists, ExistsSame, ExistsDifferent = Value
-  }
-  import Difference._
-
-  /** The same source might be used for several partest test cases (e.g. with
-    * different flags). Detects existing versions and computes the path to be
-    * used for this version, e.g. testname_v1 for the first alternative. */
-  private def computeDestAndCopyFiles(source: JFile, dest: Path, kind: String, oldFlags: List[String], nerr: String,
-      nr: Int = 0, oldOutput: String = defaultOutputDir): Unit = {
-
-    val partestOutput = dest.jfile.getParentFile + JFile.separator + dest.stripExtension + "-" + kind + ".obj"
-
-    val altOutput =
-      source.getParentFile.getAbsolutePath.map(x => if (x == JFile.separatorChar) '_' else x)
-
-    val (beforeCp, remaining) = oldFlags
-      .map(f => if (f == oldOutput) partestOutput else f)
-      .span(_ != "-classpath")
-    val flags = beforeCp ++ List("-classpath", (partestOutput :: remaining.drop(1)).mkString(":"))
-
-    val difference = getExisting(dest).isDifferent(source, flags, nerr)
-    difference match {
-      case NotExists => copyFiles(source, dest, partestOutput, flags, nerr, kind)
-      case ExistsSame => // nothing else to do
-      case ExistsDifferent =>
-        val nextDest = dest.parent / (dest match {
-          case d: Directory =>
-            val newVersion = replaceVersion(d.name, nr).getOrElse(altOutput)
-            Directory(newVersion)
-          case f =>
-            val newVersion = replaceVersion(f.stripExtension, nr).getOrElse(altOutput)
-            SFile(newVersion).addExtension(f.extension)
-        })
-        computeDestAndCopyFiles(source, nextDest, kind, flags, nerr, nr + 1, partestOutput)
-    }
-  }
-
-  /** Copies the test sources. Creates flags, nerr, check and output files. */
-  private def copyFiles(sourceFile: Path, dest: Path, partestOutput: String, flags: List[String], nerr: String, kind: String) = {
-    recCopyFiles(sourceFile, dest)
-
-    new JFile(partestOutput).mkdirs
-
-    if (flags.nonEmpty)
-      dest.changeExtension("flags").createFile(true).writeAll(flags.mkString(" "))
-    if (nerr != "0")
-      dest.changeExtension("nerr").createFile(true).writeAll(nerr)
-    sourceFile.changeExtension("check").ifFile({ check =>
-      if (kind == "run") {
-        FileManager.copyFile(check.jfile, dest.changeExtension("check").jfile)
-        dest.changeExtension("checksrc").createFile(true).writeAll("check file generated from source:\n" + check.toString)
-      } else {
-        log(s"WARNING: ignoring $check for test kind $kind")
-      }
-    })
-
-  }
-
-  /** Recursively copy over source files and directories, excluding extensions
-    * that aren't in extensionsToCopy. */
-  private def recCopyFiles(sourceFile: Path, dest: Path): Unit = {
-
-    @tailrec def copyfile(file: SFile, bytewise: Boolean): Unit = {
-      if (bytewise) {
-        val in = file.inputStream()
-        val out = SFile(dest).outputStream()
-        val buffer = new Array[Byte](1024)
-        @tailrec def loop(available: Int):Unit = {
-          if (available < 0) {()}
-          else {
-            out.write(buffer, 0, available)
-            val read = in.read(buffer)
-            loop(read)
-          }
-        }
-        loop(0)
-        in.close()
-        out.close()
-      } else {
-        try {
-          SFile(dest)(scala.io.Codec.UTF8).writeAll((s"/* !!!!! WARNING: DO NOT MODIFY. Original is at: $file !!!!! */").replace("\\", "/"), file.slurp("UTF-8"))
-        } catch {
-          case unmappable: java.nio.charset.MalformedInputException =>
-            copyfile(file, true) //there are bytes that can't be mapped with UTF-8. Bail and just do a straight byte-wise copy without the warning header.
-        }
-      }
-    }
-
-    processFileDir(sourceFile, { sf =>
-      if (extensionsToCopy.contains(sf.extension)) {
-        dest.parent.jfile.mkdirs
-        copyfile(sf, false)
-      } else {
-        log(s"WARNING: ignoring $sf")
-      }
-    }, { sdir =>
-      dest.jfile.mkdirs
-      sdir.list.foreach(path => recCopyFiles(path, dest / path.name))
-    }, Some("DPCompilerTest.recCopyFiles: sourceFile not found: " + sourceFile))
-  }
-
-  /** Reads the existing files for the given test source if any. */
-  private def getExisting(dest: Path): ExistingFiles = {
-    val content: Option[Option[String]] = processFileDir(dest, f => try Some(f.slurp("UTF8")) catch {case io: java.io.IOException => Some(io.toString())}, d => Some(""))
-    if (content.isDefined && content.get.isDefined) {
-      val flags = (dest changeExtension "flags").toFile.safeSlurp
-      val nerr = (dest changeExtension "nerr").toFile.safeSlurp
-      ExistingFiles(content.get, flags, nerr)
-    } else ExistingFiles()
-  }
-
-  /** Encapsulates existing generated test files. */
-  case class ExistingFiles(genSrc: Option[String] = None, flags: Option[String] = None, nerr: Option[String] = None) {
-    def isDifferent(sourceFile: JFile, otherFlags: List[String], otherNerr: String): Difference = {
-      if (!genSrc.isDefined) {
-        NotExists
-      } else {
-        val source = processFileDir(sourceFile, { f => try Some(f.slurp("UTF8")) catch {case _: java.io.IOException => None} }, { d => Some("") },
-            Some("DPCompilerTest sourceFile doesn't exist: " + sourceFile)).get
-        if (source == genSrc) {
-          nerr match {
-            case Some(n) if (n != otherNerr) => ExistsDifferent
-            case None if (otherNerr != "0") => ExistsDifferent
-            case _ if (flags.map(_ == otherFlags.mkString(" ")).getOrElse(otherFlags.isEmpty)) => ExistsSame
-            case _ => ExistsDifferent
-          }
-        } else ExistsDifferent
-      }
-    }
-  }
-
-  import scala.util.matching.Regex
-  val nrFinder = """(.*_v)(\d+)""".r
-  /** Changes the version number suffix in the name (without extension). */
-  private def replaceVersion(name: String, nr: Int): Option[String] = {
-    val nrString = nr.toString
-    name match {
-      case nrFinder(prefix, `nrString`) => Some(prefix + (nr + 1))
-      case _ if nr != 0 => None
-      case _ => Some(name + "_v1")
-    }
-  }
-
-  /** Returns None if the given path doesn't exist, otherwise returns Some of
-    * applying either processFile or processDir, depending on what the path
-    * refers to in the file system. If failMsgOnNone is defined, this function
-    * asserts that the file exists using the provided message. */
-  private def processFileDir[T](input: Path, processFile: SFile => T, processDir: Directory => T, failMsgOnNone: Option[String] = None): Option[T] = {
-    val res = input.ifFile(f => processFile(f)).orElse(input.ifDirectory(d => processDir(d)))
-    (failMsgOnNone, res) match {
-      case (Some(msg), None) => assert(false, msg); None
-      case _ => res
-    }
-  }
-
-  /** Creates a temporary directory and copies all (deep) files over, thus
-    * flattening the directory structure. */
-  private def flattenDir(prefix: String, dirName: String): JFile = {
-    val destDir = Directory(DPConfig.testRoot + JFile.separator + "_temp")
-    Directory(prefix + dirName).deepFiles.foreach(source => recCopyFiles(source, destDir / source.name))
-    destDir.jfile
-  }
-
-  /** Write either to console (JUnit) or log file (partest). */
-  private def log(msg: String) = logFile.map(_.appendAll(msg + "\n")).getOrElse(println(msg))
-}
-
-object CompilerTest extends App {
-
-  /** Deletes generated partest sources from a previous run, recreates
-    * directory and returns the freshly created log file. */
-  lazy val init: SFile = {
-    scala.reflect.io.Directory(DPConfig.testRoot).deleteRecursively
-    new JFile(DPConfig.testRoot).mkdirs
-    val log = DPConfig.genLog.createFile(true)
-    println(s"CompilerTest is generating tests for partest, log: $log")
-    log
-  }
-
-//  val dotcDir = "/Users/odersky/workspace/dotty/src/dotty/"
-
-//  new CompilerTest().compileFile(dotcDir + "tools/dotc/", "CompilationUnit")
-//  new CompilerTest().compileFile(dotcDir + "tools/dotc/", "Compiler")
-//  new CompilerTest().compileFile(dotcDir + "tools/dotc/", "Driver")
-//  new CompilerTest().compileFile(dotcDir + "tools/dotc/", "Main")
-//  new CompilerTest().compileFile(dotcDir + "tools/dotc/", "Run")
-
-//  new CompilerTest().compileDir(dotcDir + "tools/dotc")
- // new CompilerTest().compileFile(dotcDir + "tools/dotc/", "Run")
-}