frog: better binding of methods.

tests/corelib/src/ConstListLiteralTest.dart

 // 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.
 
 // Test that a final list literal is not expandable nor modifiable.
 
 class ConstListLiteralTest {
 
   static void testMain() {
     var list = const [4, 2, 3];
@@ skipping 43 matching lines @@
     try {
       list.copyFrom([1], 0, 0, 1);
     } catch (UnsupportedOperationException e) {
       exception = e;
     }
     Expect.equals(true, exception != null);
     Expect.equals(3, list.length);
     Expect.equals(4, list[0]);
     Expect.equals(2, list[1]);
     Expect.equals(3, list[2]);
+
+    // Note: the next check is a regression test for frog. The immutable list
+    // overrides the 'length' property of List, but relies on using the native
+    // 'forEach' construct in Array. This test ensures that our strategy works
+    // correctly.
+    int x = 0;
+    list.forEach((e) { x += e; });
+    Expect.equals(9, x);
   }
 }
 
 main() {
   ConstListLiteralTest.testMain();
 }