Add mirrors tests

test/codegen/lib/mirrors/hierarchy_invariants_test.dart

+// 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.
+
+library test.hierarchy_invariants_test;
+
+import 'dart:mirrors';
+
+import 'package:expect/expect.dart';
+
+isAnonymousMixinApplication(classMirror) {
+  return MirrorSystem.getName(classMirror.simpleName).contains(' with ');
+}
+
+checkClass(classMirror) {
+  Expect.isTrue(classMirror.simpleName is Symbol);
+  Expect.notEquals(null, classMirror.owner);
+  Expect.isTrue(classMirror.owner is LibraryMirror);
+  if (!isAnonymousMixinApplication(classMirror)) {
+    Expect.equals(classMirror.originalDeclaration,
+                  classMirror.owner.declarations[classMirror.simpleName]);
+  } else {
+    Expect.isNull(classMirror.owner.declarations[classMirror.simpleName]);
+  }
+  Expect.isTrue(classMirror.superinterfaces is List);
+  if (classMirror.superclass == null) {
+    Expect.equals(reflectClass(Object), classMirror);
+  } else {
+    checkClass(classMirror.superclass);
+  }
+}
+
+checkLibrary(libraryMirror) {
+  libraryMirror.declarations.values
+      .where((d) => d is ClassMirror)
+      .forEach(checkClass);
+}
+
+main() {
+  currentMirrorSystem().libraries.values.forEach(checkLibrary);
+}