// Copyright (c) 2020, 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 The definitions of least and greatest closure are changed in null
/// safe libraries to substitute [Never] in positions where previously [Null
/// would have been substituted, and [Object?] in positions where previously
/// [Object] or [dynamic] would have been substituted.
/// @description Check that [Object?] type is substituted for [Map<int, List<X>].
/// @note Read more about the least and greatest closure test template:
/// https://github.com/dart-lang/co19/issues/575#issuecomment-613542349
///
/// @author iarkh@unipro.ru


import "../../../../Utils/expect.dart";

void main() {
  void f<X>(Map<int, List<X>> Function() g) => g();

  // Verify that the captured type has an `x`.

  f(() => captureTypeArgument()..[0] = []);
  f(() => captureTypeArgument()..length);
  f(() => captureTypeArgument()..[0] = [null, "12345"]);

  f(() => captureTypeArgument()..x = 42);
  //                             ^
  // [analyzer] unspecified
  // [cfe] unspecified

  f(() => captureTypeArgument()..["abc"] = []);
  //                              ^^^^^
  // [analyzer] unspecified
  // [cfe] unspecified

  f(() => captureTypeArgument()..length);
}