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author | Jason Zaugg <jzaugg@gmail.com> | 2014-01-10 10:48:57 +0100 |
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committer | Jason Zaugg <jzaugg@gmail.com> | 2014-01-10 10:48:57 +0100 |
commit | 1d908106cf51279291c41fea455595ab6934d984 (patch) | |
tree | 40db46604639d24dd04d773e1552a7eb43912816 /test/pending/run | |
parent | e089cafb5fd02e2457bafde3252da3a771d3180e (diff) | |
download | scala-1d908106cf51279291c41fea455595ab6934d984.tar.gz scala-1d908106cf51279291c41fea455595ab6934d984.tar.bz2 scala-1d908106cf51279291c41fea455595ab6934d984.zip |
SI-8131 Move test for reflection thread safety to pending.
Examples noted in SI-8131 show that race conditions still abound.
This has been noted twice during pull request validation.
Diffstat (limited to 'test/pending/run')
-rw-r--r-- | test/pending/run/reflection-sync-potpourri.scala | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/test/pending/run/reflection-sync-potpourri.scala b/test/pending/run/reflection-sync-potpourri.scala new file mode 100644 index 0000000000..0ad5f2ab66 --- /dev/null +++ b/test/pending/run/reflection-sync-potpourri.scala @@ -0,0 +1,32 @@ +import scala.reflect.runtime.universe._ + +// this test checks that under heavily multithreaded conditions: +// 1) scala.reflect.runtime.universe, its rootMirror and definitions are initialized correctly +// 2) symbols are correctly materialized into PackageScopes (no dupes) +// 3) unpickling works okay even we unpickle the same symbol a lot of times + +object Test extends App { + def foo[T: TypeTag](x: T) = typeOf[T].toString + val n = 1000 + val rng = new scala.util.Random() + val types = List( + () => typeOf[java.lang.reflect.Method], + () => typeOf[java.lang.annotation.Annotation], + () => typeOf[scala.io.BufferedSource], + () => typeOf[scala.io.Codec]) + val perms = types.permutations.toList + def force(lazytpe: () => Type): String = { + lazytpe().typeSymbol.typeSignature + lazytpe().toString + } + val diceRolls = List.fill(n)(rng.nextInt(perms.length)) + val threads = (1 to n) map (i => new Thread(s"Reflector-$i") { + override def run(): Unit = { + val s1 = foo("42") + val s2 = perms(diceRolls(i - 1)).map(x => force(x)).sorted.mkString(", ") + assert(s1 == "java.lang.String") + assert(s2 == "java.lang.annotation.Annotation, java.lang.reflect.Method, scala.io.BufferedSource, scala.io.Codec") + } + }) + threads foreach (_.start) +}
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