Port tasty inspector test from scala2-library-tasty-tests

Part of #19379

The new test is run on all available configurations. Now it also runs on
Windows.

Author: nicolasstucki

scala2-library-tasty-tests/test/BootstrappedStdLibTASYyTest.scala

@@ -17,10 +17,6 @@ class BootstrappedStdLibTASYyTest:
 
   import BootstrappedStdLibTASYyTest._
 
-  /** Test that we can load trees from TASTy */
-  @Test def testTastyInspector: Unit =
-    loadWithTastyInspector(loadBlacklisted)
-
   /** Test that we can load and compile trees from TASTy in a Jar */
   @Test def testFromTastyInJar: Unit =
     compileFromTastyInJar(loadBlacklisted.union(compileBlacklisted))
@@ -52,23 +48,6 @@ class BootstrappedStdLibTASYyTest:
       compileBlacklisted.diff(scalaLibTastyPathsSet).mkString(
         "`loadBlacklisted` contains names that are not in `scalaLibTastyPaths`: \n  ", "\n  ", "\n\n"))
 
-  @Ignore
-  @Test def testLoadBacklistIsMinimal =
-    var shouldBeWhitelisted = List.empty[String]
-    val size = loadBlacklisted.size
-    for (notBlacklisted, i) <- loadBlacklist.zipWithIndex do
-      val blacklist = loadBlacklisted - notBlacklisted
-      println(s"Trying without $notBlacklisted in the blacklist  (${i+1}/$size)")
-      try {
-        loadWithTastyInspector(blacklist)
-        shouldBeWhitelisted = notBlacklisted :: shouldBeWhitelisted
-      }
-      catch {
-        case ex: Throwable => // ok
-      }
-    assert(shouldBeWhitelisted.isEmpty,
-      shouldBeWhitelisted.mkString("Some classes do not need to be blacklisted in `loadBlacklisted`\n  ", "\n  ", "\n\n"))
-
   @Ignore
   @Test def testCompileBlacklistIsMinimal =
     var shouldBeWhitelisted = List.empty[String]
@@ -101,17 +80,6 @@ object BootstrappedStdLibTASYyTest:
       .map(_.normalize.path.stripPrefix(scalaLibClassesPath.toString + "/"))
       .toList
 
-  def loadWithTastyInspector(blacklisted: Set[String]): Unit =
-    val inspector = new scala.tasty.inspector.Inspector {
-      def inspect(using Quotes)(tastys: List[Tasty[quotes.type]]): Unit =
-        for tasty <- tastys do
-          tasty.ast.show(using quotes.reflect.Printer.TreeStructure) // Check that we can traverse the full tree
-        ()
-    }
-    val tastyFiles = scalaLibTastyPaths.filterNot(blacklisted)
-    val isSuccess = TastyInspector.inspectTastyFiles(tastyFiles.map(x => scalaLibClassesPath.resolve(x).toString))(inspector)
-    assert(isSuccess, "Errors reported while loading from TASTy")
-
   def compileFromTastyInJar(blacklisted: Set[String]): Unit = {
     val driver = new dotty.tools.dotc.Driver
     val yFromTastyBlacklist =

tests/run-tasty-inspector/scala2-library-test.scala

@@ -0,0 +1,53 @@
+import scala.quoted._
+import scala.tasty.inspector._
+
+import dotty.tools.io.Directory
+
+import java.io.File.pathSeparator
+import java.io.File.separator
+
+@main def Test: Unit =
+  blacklistsOnlyContainsClassesThatExist()
+  testTastyInspector()
+
+/** Test that we can load trees from TASTy */
+def testTastyInspector(): Unit =
+  loadWithTastyInspector(loadBlacklisted)
+
+def blacklistsOnlyContainsClassesThatExist() =
+  val scalaLibTastyPathsSet = scalaLibTastyPaths.toSet
+  assert(loadBlacklisted.diff(scalaLibTastyPathsSet).isEmpty,
+    loadBlacklisted.diff(scalaLibTastyPathsSet).mkString(
+      "`loadBlacklisted` contains names that are not in `scalaLibTastyPaths`: \n  ", "\n  ", "\n\n"))
+
+def dottyVersion =
+  System.getProperty("java.class.path").nn.split(pathSeparator).collectFirst {
+    case path if path.endsWith(".jar") && path.contains("scala3-library_3-") =>
+      path.split("scala3-library_3-").last.stripSuffix(".jar")
+  }.get
+
+def scalaLibClassesPath =
+  java.nio.file.Paths.get(
+    s"out/bootstrap/scala2-library-bootstrapped/scala-$dottyVersion-nonbootstrapped/classes".replace("/", separator))
+
+lazy val scalaLibTastyPaths =
+  new Directory(scalaLibClassesPath).deepFiles
+    .filter(_.`extension` == "tasty")
+    .map(_.normalize.path.stripPrefix(scalaLibClassesPath.toString + separator))
+    .toList
+
+def loadWithTastyInspector(blacklisted: Set[String]): Unit =
+  val inspector = new scala.tasty.inspector.Inspector {
+    def inspect(using Quotes)(tastys: List[Tasty[quotes.type]]): Unit =
+      for tasty <- tastys do
+        tasty.ast.show(using quotes.reflect.Printer.TreeStructure) // Check that we can traverse the full tree
+      ()
+  }
+  val tastyFiles = scalaLibTastyPaths.filterNot(blacklisted)
+  val isSuccess = TastyInspector.inspectTastyFiles(tastyFiles.map(x => scalaLibClassesPath.resolve(x).toString))(inspector)
+  assert(isSuccess, "Errors reported while loading from TASTy")
+
+/** Set of tasty files that cannot be loaded from TASTy */
+def loadBlacklisted = Set[String](
+  // No issues :)
+)