Rewrite test

Test rewritings that were implemented so far.

2 files changed, 19 insertions, 1 deletions

diff --git a/test/dotc/tests.scala b/test/dotc/tests.scala
index 2d4ed289c..457116feb 100644
--- a/test/dotc/tests.scala
+++ b/test/dotc/tests.scala
@@ -104,6 +104,8 @@ class tests extends CompilerTest {
 
   @Test def pos_scala2_all = compileFiles(posScala2Dir, scala2mode)
 
+  @Test def rewrites = compileFile(posScala2Dir, "rewrites", "-rewrite" :: scala2mode)
+
   @Test def pos_859 = compileFile(posSpecialDir, "i859", scala2mode)(allowDeepSubtypes)
 
   @Test def new_all = compileFiles(newDir, twice)
diff --git a/test/test/CompilerTest.scala b/test/test/CompilerTest.scala
index 678ef74b1..739bba46d 100644
--- a/test/test/CompilerTest.scala
+++ b/test/test/CompilerTest.scala
@@ -10,6 +10,7 @@ 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 }
+import dotty.tools.io.PlainFile
 
 import org.junit.Test
 
@@ -89,7 +90,20 @@ abstract class CompilerTest {
     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$extension")
-      compileArgs((s"$filePath" :: args).toArray, expErrors)
+      if (args.contains("-rewrite")) {
+        val file = new PlainFile(filePath)
+        val data = file.toByteArray
+        val cs = data.map(_.toChar)
+        println(s"data = ${cs.mkString}")
+        compileArgs((filePath :: args).toArray, expErrors)
+        val plainArgs = args.filter(arg => arg != "-rewrite" && arg != "-language:Scala2")
+        println(s"plainArgs = $plainArgs")
+        compileFile(prefix, fileName, plainArgs, extension, runTest)
+        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")
@@ -191,6 +205,8 @@ abstract class CompilerTest {
     }
   }
 
+
+
   // ========== HELPERS =============
 
   private def expectedErrors(filePaths: List[String]): List[ErrorsInFile] = if (filePaths.exists(isNegTest(_))) filePaths.map(getErrors(_)) else Nil