// 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 A map literal of the form [<K, V>{entry_1 ... entry_n}] is
/// evaluated as follows:
///
///   1. Allocate a fresh instance [map] of a class that implements
///     [LinkedHashMap<K, V>].
///     ...
///   3. The result of the map literal expression is [map].
/// @description Checks that instance of [LinkedHashMap<K, V>] is created for a
/// map literal
/// @author iarkh@unipro.ru

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

Map map1 = {1: 1, 2: 2, 3: 3, 4: 4, 5: 5};
Map map2 = {};
Map? map3 = null;
Map map4 = {1: "a", 2: "2", 3: "three", 4: "checkme"};

main() {
  Expect.isTrue(<int, int>{...map1} is LinkedHashMap<int, int>);
  Expect.isTrue(<int, Object>{...map1} is LinkedHashMap<int, Object>);
  Expect.isTrue(<Object, Object>{...map1} is LinkedHashMap<Object, Object>);
  Expect.isTrue(
      <int, Object>{1: "a", 2: "b", ...map1} is LinkedHashMap<int, Object>);
  Expect.isTrue(
      <int, num>{1: 0, ...?map1, 14: 6, 9: 9} is LinkedHashMap<int, num>);
//                     ^^^^
// [analyzer] STATIC_WARNING.INVALID_NULL_AWARE_OPERATOR
//                         ^
// [cfe] Operand of null-aware operation '...?' has type 'Map<dynamic, dynamic>' which excludes null.
  Expect.isTrue(<int, String>{...map2, 1: "123"} is LinkedHashMap<int, String>);
  Expect.isTrue(<int, String>{...?map2} is LinkedHashMap<int, String>);
//                            ^^^^
// [analyzer] STATIC_WARNING.INVALID_NULL_AWARE_OPERATOR
//                                ^
// [cfe] Operand of null-aware operation '...?' has type 'Map<dynamic, dynamic>' which excludes null.
  Expect.isTrue(<int, String>{...map2} is LinkedHashMap<int, String>);
  Expect.isTrue(
      <int, String>{...?map3, 1: "123"} is LinkedHashMap<int, String>);
  Expect.isTrue(<int, String>{...?map3} is LinkedHashMap<int, String>);
  Expect.isTrue({...map4} is LinkedHashMap<Object?, Object?>);
}