Add corelib tests

test/codegen/corelib/reg_exp_group_test.dart

Index: test/codegen/corelib/reg_exp_group_test.dart
diff --git a/test/codegen/corelib/reg_exp_group_test.dart b/test/codegen/corelib/reg_exp_group_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..1bf4af3753b8184c4df05e866b5e50e166580ec7
--- /dev/null
+++ b/test/codegen/corelib/reg_exp_group_test.dart
@@ -0,0 +1,22 @@
+// Copyright (c) 2011, 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.
+
+import "package:expect/expect.dart";
+
+// Dart test program for RegExp.group.
+
+class RegExpGroupTest {
+  static testMain() {
+    var match = new RegExp("(a(b)((c|de)+))").firstMatch("abcde");
+    Expect.equals('abcde', match.group(0));
+    Expect.equals('abcde', match.group(1));
+    Expect.equals('b', match.group(2));
+    Expect.equals('cde', match[3]);
+    Expect.equals('de', match[4]);
+  }
+}
+
+main() {
+  RegExpGroupTest.testMain();
+}