LanguageFeatures/nnbd/weak/list_length_t02.dart

// Copyright (c) 2019, 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.

/**
 * @assertion Calling the .length setter on a List with element type E with an
 * argument greater than the current length of the list is a runtime error
 * unless Null <: E
 * @description Check that calling the .length setter on a List with element
 * type E with an argument greater than the current length of the list is not  a
 * runtime error in a weak mode
 * @author sgrekhov@unipro.ru
 * @issue 39777
 */
// Requirements=nnbd-weak
import "legacy_lib.dart";
import "dart:async";
import "../../../Utils/expect.dart";

class A {}

test<T>(T t1, T t2) {
  List<T> list = [t1, t2];
  list.length = 3;
  Expect.isNull(list[2]);
}

main() {
  test<A>(A(), A());
  test<LegacyFoo>(fLegacy2, fLegacy2);
  test<FutureOr<A>>(A(), A());
  test<FutureOr<LegacyFoo>>(fLegacy2, fLegacy2);
  test<FutureOr<FutureOr<A>>>(A(), A());
}