blob: baee04c3a873beb7a3283805a19faa7ad98dd4c5 [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.
import 'package:expect/expect.dart';
import 'helper_classes.dart';
// Typed as dynamic to also test spreading a value of type dynamic.
final dynamic list = [1, 2, 3, 4];
final dynamic map = {1: 1, 2: 2, 3: 3, 4: 4};
final dynamic set = {1, 2, 3, 4};
void main() {
testList();
testMap();
testSet();
testDuplicateKeys();
testKeyOrder();
}
void testList() {
// Only spread.
Expect.listEquals(list, <int>[...list]);
// Spread at beginning.
Expect.listEquals(list, <int>[...<int>[1, 2], 3, 4]);
// Spread in middle.
Expect.listEquals(list, <int>[1, ...<int>[2, 3], 4]);
// Spread at end.
Expect.listEquals(list, <int>[1, 2, ...<int>[3, 4]]);
// Empty spreads.
Expect.listEquals(list,
<int>[...<int>[], 1, 2, ...<int>[], 3, 4, ...<int>[]]);
// Multiple spreads.
Expect.listEquals(list, <int>[...<int>[1], 2, ...<int>[3, 4]]);
// Nested spreads.
Expect.listEquals(list, <int>[...<int>[...<int>[1, 2], ...<int>[3, 4]]]);
// Null-aware.
var list23 = [2, 3] as List<int>?;
var list4 = [4] as List<int>?;
Expect.listEquals(list, <int>[1, ...?list23, ...?(null), ...?list4]);
// Does not deep flatten.
var innerList = <int>[3];
Expect.listEquals(
<Object>[1, 2, innerList, 4],
<Object>[1, ...<Object>[2, innerList, 4]]);
// Downcast element from dynamic.
Expect.listEquals(list, <int>[...<dynamic>[1, 2, 3, 4]]);
}
void testMap() {
// Only spread.
Expect.mapEquals(map, <int, int>{...map});
// Spread at beginning.
Expect.mapEquals(map, <int, int>{...<int, int>{1: 1, 2: 2}, 3: 3, 4: 4});
// Spread in middle.
Expect.mapEquals(map, <int, int>{1: 1, ...<int, int>{2: 2, 3: 3}, 4: 4});
// Spread at end.
Expect.mapEquals(map, <int, int>{1: 1, 2: 2, ...<int, int>{3: 3, 4: 4}});
// Empty spreads.
Expect.mapEquals(map, <int, int>{
...<int, int>{},
1: 1,
2: 2,
...<int, int>{},
3: 3,
4: 4,
...<int, int>{}
});
// Multiple spreads.
Expect.mapEquals(map,
<int, int>{...<int, int>{1: 1}, 2: 2, ...<int, int>{3: 3, 4: 4}});
// Nested spreads.
Expect.mapEquals(map, <int, int>{
...<int, int>{
...<int, int>{1: 1, 2: 2},
...<int, int>{3: 3, 4: 4}
}
});
// Null-aware.
var map23 = {2: 2, 3: 3} as Map<int, int>?;
var map4 = {4: 4} as Map<int, int>?;
Expect.mapEquals(map, <int, int>{
1: 1,
...?map23,
...?(null),
...?map4
});
// Does not deep flatten.
var innerMap = <int, int>{3: 3};
Expect.mapEquals(<int, Object>{
1: 1,
2: 2,
3: innerMap,
4: 4
}, <int, Object>{
1: 1,
...<int, Object>{
2: 2,
3: innerMap,
4: 4
}
});
// Downcast element from dynamic.
Expect.mapEquals(
map, <int, int>{...<dynamic, dynamic>{1: 1, 2: 2, 3: 3, 4: 4}});
}
void testSet() {
// Only spread.
Expect.setEquals(set, <int>{...set});
// Spread at beginning.
Expect.setEquals(set, <int>{...<int>[1, 2], 3, 4});
// Spread in middle.
Expect.setEquals(set, <int>{1, ...<int>[2, 3], 4});
// Spread at end.
Expect.setEquals(set, <int>{1, 2, ...<int>[3, 4]});
// Empty spreads.
Expect.setEquals(set, <int>{...<int>[], 1, 2, ...<int>[], 3, 4, ...<int>[]});
// Multiple spreads.
Expect.setEquals(set, <int>{...<int>[1], 2, ...<int>[3, 4]});
// Nested spreads.
Expect.setEquals(set, <int>{...<int>{...<int>[1, 2], ...<int>[3, 4]}});
// Null-aware.
var list23 = [2, 3] as List<int>?;
var list4 = [4] as List<int>?;
Expect.setEquals(set, <int>{1, ...?list23, ...?(null), ...?list4});
// Does not deep flatten.
var innerSet = <int>{3};
Expect.setEquals(<Object>{1, 2, innerSet, 4},
<Object>{1, ...<Object>[2, innerSet, 4]});
// Downcast element from dynamic.
Expect.setEquals(set, <int>{...<dynamic>[1, 2, 3, 4]});
}
void testDuplicateKeys() {
Expect.mapEquals(map, <int, int>{
1: 1,
2: 2,
...<int, int>{2: 2, 3: 3, 4: 4},
...<int, int>{3: 3},
4: 4
});
Expect.setEquals(set, <int>{1, 2, ...<int>[1, 2, 3, 4], ...<int>[2, 3], 4});
}
void testKeyOrder() {
// First equal key wins.
var e1a = Equality(1, "a");
var e1b = Equality(1, "b");
var e2a = Equality(2, "a");
var e2b = Equality(2, "b");
var map = <Equality, int>{e1a: 1, ...<Equality, int>{e1b: 2, e2a: 3, e2b: 4}};
Expect.equals("1:a,2:a", map.keys.join(","));
var set = <Equality>{e1a, ...<Equality>[e1b, e2a, e2b]};
Expect.equals("1:a,2:a", set.join(","));
// All elements are evaluated, left to right.
var transcript = <String>[];
T log<T>(T value) {
transcript.add(value.toString());
return value;
}
map = <Equality, int>{
log(e1a): log(1),
...<Equality, int>{log(e1b): log(2), log(e2a): log(3), log(e2b): log(4)}
};
Expect.equals("1:a,1,1:b,2,2:a,3,2:b,4", transcript.join(","));
transcript.clear();
set = <Equality>{log(e1a), ...<Equality>[log(e1b), log(e2a), log(e2b)]};
Expect.equals("1:a,1:b,2:a,2:b", transcript.join(","));
}