Migrated test block 13 to Dart 2.0.

tests/corelib/list_index_of_test.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.
-
-import "package:expect/expect.dart";
-
-main() {
-  test(new List<int>(5));
-  var l = new List<int>();
-  l.length = 5;
-  test(l);
-}
-
-void test(List<int> list) {
-  list[0] = 1;
-  list[1] = 2;
-  list[2] = 3;
-  list[3] = 4;
-  list[4] = 1;
-
-  Expect.equals(3, list.indexOf(4, 0));
-  Expect.equals(0, list.indexOf(1, 0));
-  Expect.equals(4, list.lastIndexOf(1, list.length - 1));
-
-  Expect.equals(4, list.indexOf(1, 1));
-  Expect.equals(-1, list.lastIndexOf(4, 2));
-
-  Expect.equals(3, list.indexOf(4, 2));
-  Expect.equals(3, list.indexOf(4, -5));
-  Expect.equals(-1, list.indexOf(4, 50));
-
-  Expect.equals(-1, list.lastIndexOf(4, 2));
-  Expect.equals(-1, list.lastIndexOf(4, -5));
-  Expect.equals(3, list.lastIndexOf(4, 50));
-}