Add mirrors tests

test/codegen/lib/mirrors/reflect_runtime_type_test.dart

Index: test/codegen/lib/mirrors/reflect_runtime_type_test.dart
diff --git a/test/codegen/lib/mirrors/reflect_runtime_type_test.dart b/test/codegen/lib/mirrors/reflect_runtime_type_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..dbc225a5518de5b073533116dadb98cd70319262
--- /dev/null
+++ b/test/codegen/lib/mirrors/reflect_runtime_type_test.dart
@@ -0,0 +1,25 @@
+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// A simple test that ensure that reflection works on runtime types of
+// instantiated classes.
+
+import "dart:mirrors";
+
+class Foo {
+  int a;
+}
+
+main() {
+  var m = reflectClass(new Foo().runtimeType);
+  var field = publicFields(m).single;
+  if (MirrorSystem.getName(field.simpleName) != 'a') {
+    throw 'Expected "a", but got "${MirrorSystem.getName(field.simpleName)}"';
+  }
+  print(field);
+}
+
+publicFields(ClassMirror mirror) =>
+    mirror.declarations.values.where(
+        (x) => x is VariableMirror && !(x.isPrivate || x.isStatic));