Test pickling paths with a JUnit test

Author: abgruszecki

compiler/test/dotty/tools/dotc/core/tasty/PathPicklingTest.scala

@@ -0,0 +1,64 @@
+package dotty.tools.dotc.core.tasty
+
+import java.io.{File => JFile, IOException}
+import java.nio.file.{Files, NoSuchFileException, Path, Paths}
+
+import scala.sys.process._
+
+import org.junit.Test
+import org.junit.Assert.{assertEquals, assertTrue, assertFalse, fail}
+
+import dotty.tools.dotc.ast.tpd
+import dotty.tools.dotc.ast.tpd.TreeOps
+import dotty.tools.dotc.{Driver, Main}
+import dotty.tools.dotc.core.Comments.CommentsContext
+import dotty.tools.dotc.core.Contexts.Context
+import dotty.tools.dotc.core.Decorators.{toTermName, toTypeName}
+import dotty.tools.dotc.core.Mode
+import dotty.tools.dotc.core.Names.Name
+import dotty.tools.dotc.interfaces.Diagnostic.ERROR
+import dotty.tools.dotc.reporting.TestReporter
+import dotty.tools.io.{Directory, File, Path}
+
+import dotty.tools.vulpix.TestConfiguration
+
+class PathPicklingTest {
+
+  @Test def test(): Unit = {
+    val out = JFile("out/testPathPickling")
+    val cwd = JFile("").getAbsolutePath()
+    delete(out)
+    out.mkdir()
+
+    // let's try to avoid potentially catastrophic things, shall we?
+    require(!out.toString.contains(" "))
+    require(!cwd.toString.contains(" "))
+
+    val exitcode =
+      val ignorantProcessLogger = ProcessLogger(_ => ())
+      Seq("sbt", s"scalac -d $out/out.jar -sourceroot tests/pos $cwd/tests/pos/i10430/lib.scala $cwd/tests/pos/i10430/app.scala").!(ignorantProcessLogger)
+
+    assertTrue("Compilation failed.", exitcode == 0)
+
+    val decompiled =
+      Seq("sbt", s"scalac -decompile -print-tasty -color:never $out/out.jar").!!
+
+    assertTrue(decompiled.contains(": i10430/lib.scala"))
+    assertTrue(decompiled.contains(": i10430/app.scala"))
+    assertTrue(decompiled.contains("[i10430/lib.scala]"))
+    assertTrue(decompiled.contains("[i10430/app.scala]"))
+
+    assertFalse(decompiled.contains(": i10430\\lib.scala"))
+    assertFalse(decompiled.contains(": i10430\\app.scala"))
+    assertFalse(decompiled.contains("[i10430\\lib.scala]"))
+    assertFalse(decompiled.contains("[i10430\\app.scala]"))
+  }
+
+  private def delete(file: JFile): Unit = {
+    if (file.isDirectory) file.listFiles.foreach(delete)
+    try Files.delete(file.toPath)
+    catch {
+      case _: NoSuchFileException => // already deleted, everything's fine
+    }
+  }
+}