LanguageFeatures/Spread-collections/ConstSpreads_A06_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 This enables in-place literals (which aren't very useful):
///
///   const list = [...["why"]];
/// @description Checks that in-place literals are enabled for sets
/// @author iarkh@unipro.ru

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

main() {
  const res1 = {...["why"]};
  Expect.setEquals({"why"}, res1);
  const res2 = {...?["not"]};
//              ^^^^
// [analyzer] STATIC_WARNING.INVALID_NULL_AWARE_OPERATOR
//                  ^
// [cfe] Operand of null-aware operation '...?' has type 'List<String>' which excludes null.
  Expect.setEquals({"not"}, res2);

  const res3 = {...{"why"}};
  Expect.setEquals({"why"}, res3);
  const res4 = {...?{"not"}};
//              ^^^^
// [analyzer] STATIC_WARNING.INVALID_NULL_AWARE_OPERATOR
//                  ^
// [cfe] Operand of null-aware operation '...?' has type 'Set<String>' which excludes null.
  Expect.setEquals({"not"}, res4);

  const aList = [1, 2, 3];

  const res5 = {2, ...[1, 3], 4, 15, ...[null], ...{12345}, aList};
  Expect.setEquals({2, 1, 3, 4, 15, null, 12345, aList}, res5);

  const res6 = {1, 2, 3, ...[4, 5, 6], ...?[7, 8, 9], aList};
//                                     ^^^^
// [analyzer] STATIC_WARNING.INVALID_NULL_AWARE_OPERATOR
//                                         ^
// [cfe] Operand of null-aware operation '...?' has type 'List<int>' which excludes null.
  Expect.setEquals({1, 2, 3, 4, 5, 6, 7, 8, 9, aList}, res6);

  const aSet = {1, 2, 3};
  const res7 = {1, 2, 3, ...[4, 5, 6], ...?{7, 8, 9}, aSet};
//                                     ^^^^
// [analyzer] STATIC_WARNING.INVALID_NULL_AWARE_OPERATOR
//                                         ^
// [cfe] Operand of null-aware operation '...?' has type 'Set<int>' which excludes null.
  Expect.setEquals({1, 2, 3, 4, 5, 6, 7, 8, 9, aSet}, res7);
}