test rename overhaul: step 5 - frog and leg tests

frog/tests/leg_only/switch_test.dart

 // Copyright (c) 2012, 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.
 
 switcher(val) {
   var x = 0;
   switch (val) {
   case 1:
     x = 100;
     break;
   case 2:
     x = 200;
     break;
   case 3:
     x = 300;
     break;
   default:
     return 400;
     break; // Intentional dead code (regression test for crash).
   }
   return x;
 }
 
 main() {
   Expect.equals(100, switcher(1));
   Expect.equals(200, switcher(2));
   Expect.equals(300, switcher(3));
   Expect.equals(400, switcher(4));
 }