test rename overhaul: step 8 - language tests

tests/language/src/Factory3Test.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.
-// VMOptions=--enable_type_checks --enable_asserts
-
-interface Link<T> extends Iterable<T> default LinkFactory<T> {
-  Link(T head, [Link<T> tail]);
-  Link<T> prepend(T element);
-}
-
-interface EmptyLink<T> extends Link<T> default LinkTail<T> {
-  const EmptyLink();
-}
-
-class LinkFactory<T> {
-  factory Link(T head, [Link<T> tail]) {
-    return new LinkEntry<T>(head, tail);
-  }
-}
-
-class AbstractLink<T> implements Link<T> {
-  const AbstractLink();
-  Link<T> prepend(T element) {
-    print("$element");
-    if (0 is T) {
-      throw "0 is not a T";
-    }
-    return new Link<T>(element, this);
-  }
-}
-
-class LinkTail<T> extends AbstractLink<T> implements EmptyLink<T> {
-  const LinkTail();
-}
-
-class LinkEntry<T> extends AbstractLink<T> {
-  LinkEntry(T head, Link<T> realTail);
-}
-
-class Fisk {
-  Link<Fisk> nodes = const EmptyLink<Fisk>();
-  final int id;
-  Fisk(this.id);
-  toString() => id.toString();
-}
-
-main() {
-  new Fisk(0).nodes.prepend(new Fisk(1)).prepend(new Fisk(2));
-}
-