OLD | NEW |
(Empty) | |
| 1 // Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. |
| 4 |
| 5 import 'package:collection/collection.dart'; |
| 6 import 'package:test/test.dart'; |
| 7 |
| 8 import '../unmodifiable_collection_test.dart' as common; |
| 9 |
| 10 void main() { |
| 11 var map1 = const {1: 1, 2: 2, 3: 3}; |
| 12 var map2 = const {4: 4, 5: 5, 6: 6}; |
| 13 var map3 = const {7: 7, 8: 8, 9: 9}; |
| 14 var concat = {}..addAll(map1)..addAll(map2)..addAll(map3); |
| 15 |
| 16 // In every way possible this should test the same as an UnmodifiableMapView. |
| 17 common.testReadMap( |
| 18 concat, new CombinedMapView([map1, map2, map3]), 'CombinedMapView'); |
| 19 |
| 20 common.testReadMap( |
| 21 concat, |
| 22 new CombinedMapView([map1, {}, map2, {}, map3, {}]), |
| 23 'CombinedMapView (some empty)'); |
| 24 |
| 25 test('should function as an empty map when no maps are passed', () { |
| 26 var empty = new CombinedMapView([]); |
| 27 expect(empty, isEmpty); |
| 28 expect(empty.length, 0); |
| 29 }); |
| 30 |
| 31 test('should function as an empty map when only empty maps are passed', () { |
| 32 var empty = new CombinedMapView([{}, {}, {}]); |
| 33 expect(empty, isEmpty); |
| 34 expect(empty.length, 0); |
| 35 }); |
| 36 |
| 37 test('should reflect underlying changes back to the combined map', () { |
| 38 var backing1 = <int, int>{}; |
| 39 var backing2 = <int, int>{}; |
| 40 var combined = new CombinedMapView([backing1, backing2]); |
| 41 expect(combined, isEmpty); |
| 42 backing1.addAll(map1); |
| 43 expect(combined, map1); |
| 44 backing2.addAll(map2); |
| 45 expect(combined, new Map.from(backing1)..addAll(backing2)); |
| 46 }); |
| 47 |
| 48 test('should reflect underlying changes with a single map', () { |
| 49 var backing1 = <int, int>{}; |
| 50 var combined = new CombinedMapView([backing1]); |
| 51 expect(combined, isEmpty); |
| 52 backing1.addAll(map1); |
| 53 expect(combined, map1); |
| 54 }); |
| 55 } |
OLD | NEW |