Format paths for testing

Author: som-snytt

compiler/src/dotty/tools/dotc/report.scala

@@ -144,8 +144,6 @@ object report:
       case Nil => pos
     recur(pos.sourcePos, tpd.enclosingInlineds)
 
-  private object messageRendering extends MessageRendering
-
   // Should only be called from Run#enrichErrorMessage.
   def enrichErrorMessage(errorMessage: String)(using Context): String =
     if ctx.settings.XnoEnrichErrorMessages.value then errorMessage

compiler/src/dotty/tools/dotc/reporting/MessageRendering.scala

@@ -8,6 +8,7 @@ import java.lang.System.{lineSeparator => EOL}
 
 import core.Contexts.*
 import core.Decorators.*
+import io.AbstractFile
 import printing.Highlighting.{Blue, Red, Yellow}
 import printing.SyntaxHighlighting
 import Diagnostic.*
@@ -158,9 +159,12 @@ trait MessageRendering {
       .mkString(EOL)
   }
 
+  // file.path or munge it to normalize for testing
+  protected def renderPath(file: AbstractFile): String = file.path
+
   /** The source file path, line and column numbers from the given SourcePosition */
   protected def posFileStr(pos: SourcePosition): String =
-    val path = pos.source.file.path
+    val path = renderPath(pos.source.file)
     if pos.exists then s"$path:${pos.line + 1}:${pos.column}" else path
 
   /** The separator between errors containing the source file and error type

compiler/test/dotty/tools/dotc/reporting/TestReporter.scala

@@ -1,23 +1,24 @@
-package dotty.tools
+package dotty
+package tools
 package dotc
 package reporting
 
-import scala.language.unsafeNulls
-import java.io.{BufferedReader, FileInputStream, FileOutputStream, FileReader, PrintStream, PrintWriter, StringReader, StringWriter, File as JFile}
+import java.io.{File as JFile, *}
 import java.text.SimpleDateFormat
 import java.util.Date
-import core.Decorators.*
 
-import scala.collection.mutable
-import scala.jdk.CollectionConverters.*
-import util.SourcePosition
 import core.Contexts.*
-import Diagnostic.*
-import dotty.Properties
+import core.Decorators.*
 import interfaces.Diagnostic.{ERROR, WARNING}
+import io.AbstractFile
+import util.SourcePosition
+import Diagnostic.*
 
-import scala.io.Codec
+import scala.collection.mutable
 import scala.compiletime.uninitialized
+import scala.io.Codec
+import scala.jdk.CollectionConverters.*
+import scala.language.unsafeNulls
 
 class TestReporter protected (outWriter: PrintWriter, logLevel: Int)
 extends Reporter with UniqueMessagePositions with HideNonSensicalMessages with MessageRendering {
@@ -37,6 +38,8 @@ extends Reporter with UniqueMessagePositions with HideNonSensicalMessages with M
   final def setSkip(): Unit = _skip = true
   final def skipped: Boolean = _skip
 
+  override protected def renderPath(file: AbstractFile): String = file.path.replace("\\", "/")
+
   protected final def inlineInfo(pos: SourcePosition)(using Context): String =
     if (pos.exists) {
       if (pos.outer.exists)