blob: 7ccd61a694606213959ce561b800d7890f3d5f85 [file] [log] [blame]
// 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 An expression like:
/// { ...a, ...b }
/// Is syntactically parsed as [mapOrSetLiteral]. To determine whether it
/// actually is a map or set, the surrounding context is used. Given an
/// [mapOrSetLiteral] with context type [C]:
/// If [Set<Null>] is assignable to [C], and [Map<Null, Null>] is not
/// assignable to [C], then the collection is a set literal.
/// Otherwise, it is a map literal.
/// In other words, if it can only be a set, it is. Otherwise, it's a map.
/// @description Checks that if [a] and [b] are map literals (probably,
/// null-aware), their spread is a map.
/// @author
import "../../Utils/expect.dart";
Map? getAMap1() => {1: 1, "test": 1, 14: null};
Map? getAMap4() => <bool, String>{true: "true", false: "false"};
Map? getAMap3() => <String, bool>{};
main() {
var map1 = {1: 1, "test": 1, 14: null};
var map2 = null;
var map3 = <String, bool>{};
var map4 = <bool, String>{true: "true", false: "false"};
Map res1 = {...map1, ...?map2};
Expect.mapEquals(map1, res1);
Map res2 = {...?map2, ...map3};
Expect.mapEquals(map3, res2);
Map res3 = {...?map2, ...map4};
Expect.mapEquals(map4, res3);
Map res4 = {...?getAMap1(), ...?map2};
Expect.mapEquals(map1, res4);
Map res5 = {...?map2, ...?getAMap3()};
Expect.mapEquals(map3, res5);
Map res6 = {...?map2, ...?getAMap4()};
Expect.mapEquals(map4, res6);
Map res7 = {...?getAMap1(), ...?map2, ...?getAMap3(), ...?getAMap4()};
{1: 1, "test": 1, 14: null, true: "true", false: "false"}, res7);