Migrated test block 13 to Dart 2.0.

tests/corelib_strong/list_growable_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.
-
-import "package:expect/expect.dart";
-
-main() {
-  var a;
-  a = new List();
-  a.add(499);
-  Expect.equals(1, a.length);
-  Expect.equals(499, a[0]);
-  a.clear();
-  Expect.equals(0, a.length);
-  Expect.throws(() => a[0], (e) => e is RangeError);
-
-  a = new List(42).toList();
-  Expect.equals(42, a.length);
-  a.add(499);
-  Expect.equals(43, a.length);
-  Expect.equals(499, a[42]);
-  Expect.equals(null, a[23]);
-  a.clear();
-  Expect.equals(0, a.length);
-  Expect.throws(() => a[0], (e) => e is RangeError);
-
-  a = new List<int>(42).toList();
-  Expect.equals(42, a.length);
-  a.add(499);
-  Expect.equals(43, a.length);
-  Expect.equals(499, a[42]);
-  for (int i = 0; i < 42; i++) {
-    Expect.equals(null, a[i]);
-  }
-  a.clear();
-  Expect.equals(0, a.length);
-  Expect.throws(() => a[0], (e) => e is RangeError);
-}