test rename overhaul: step 8 - language tests

tests/language/src/Switch6Test.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.
-// The break is in the right scope, http://b/3428700 was agreed upon.
-
-class Switch6Test {
-
-  static testMain() {
-    var a = 0;
-    var x = -1;
-    switch (a) {
-      case 0: {
-        x = 0;
-        break;
-      }
-      case 1:
-        x = 1;
-        break;
-    }
-    Expect.equals(0, x);
-  }
-
-}
-
-main() {
-  Switch6Test.testMain();
-}