Index: packages/collection/test/combined_wrapper/list_test.dart |
diff --git a/packages/collection/test/combined_wrapper/list_test.dart b/packages/collection/test/combined_wrapper/list_test.dart |
new file mode 100644 |
index 0000000000000000000000000000000000000000..1a00f32421aab770eba53f07ca5ae82f0b8f694e |
--- /dev/null |
+++ b/packages/collection/test/combined_wrapper/list_test.dart |
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+// Copyright (c) 2017, 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:collection/collection.dart'; |
+import 'package:test/test.dart'; |
+ |
+import '../unmodifiable_collection_test.dart' as common; |
+ |
+void main() { |
+ var list1 = [1, 2, 3]; |
+ var list2 = [4, 5, 6]; |
+ var list3 = [7, 8, 9]; |
+ var concat = []..addAll(list1)..addAll(list2)..addAll(list3); |
+ |
+ // In every way possible this should test the same as an UnmodifiableListView. |
+ common.testUnmodifiableList( |
+ concat, new CombinedListView([list1, list2, list3]), 'combineLists'); |
+ |
+ common.testUnmodifiableList(concat, |
+ new CombinedListView([list1, [], list2, [], list3, []]), 'combineLists'); |
+ |
+ test('should function as an empty list when no lists are passed', () { |
+ var empty = new CombinedListView([]); |
+ expect(empty, isEmpty); |
+ expect(empty.length, 0); |
+ expect(() => empty[0], throwsRangeError); |
+ }); |
+ |
+ test('should function as an empty list when only empty lists are passed', () { |
+ var empty = new CombinedListView([[], [], []]); |
+ expect(empty, isEmpty); |
+ expect(empty.length, 0); |
+ expect(() => empty[0], throwsRangeError); |
+ }); |
+ |
+ test('should reflect underlying changes back to the combined list', () { |
+ var backing1 = <int>[]; |
+ var backing2 = <int>[]; |
+ var combined = new CombinedListView([backing1, backing2]); |
+ expect(combined, isEmpty); |
+ backing1.addAll(list1); |
+ expect(combined, list1); |
+ backing2.addAll(list2); |
+ expect(combined, backing1.toList()..addAll(backing2)); |
+ }); |
+ |
+ test('should reflect underlying changes from the list of lists', () { |
+ var listOfLists = <List<int>>[]; |
+ var combined = new CombinedListView(listOfLists); |
+ expect(combined, isEmpty); |
+ listOfLists.add(list1); |
+ expect(combined, list1); |
+ listOfLists.add(list2); |
+ expect(combined, []..addAll(list1)..addAll(list2)); |
+ listOfLists.clear(); |
+ expect(combined, isEmpty); |
+ }); |
+ |
+ test('should reflect underlying changes with a single list', () { |
+ var backing1 = <int>[]; |
+ var combined = new CombinedListView([backing1]); |
+ expect(combined, isEmpty); |
+ backing1.addAll(list1); |
+ expect(combined, list1); |
+ }); |
+} |