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packages/quiver/test/collection/delegates/map_test.dart

+// Copyright 2013 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+library quiver.collection.delegates.map_test;
+
+import 'package:quiver/collection.dart';
+import 'package:test/test.dart';
+
+class MyMap extends DelegatingMap<String, int> {
+  final Map<String, int> _delegate;
+
+  MyMap(this._delegate);
+
+  Map<String, int> get delegate => _delegate;
+}
+
+void main() {
+  group('DelegatingMap', () {
+    DelegatingMap<String, int> delegatingMap;
+
+    setUp(() {
+      delegatingMap = new MyMap({'a': 1, 'bb': 2});
+    });
+
+    test('[]', () {
+      expect(delegatingMap['a'], equals(1));
+      expect(delegatingMap['bb'], equals(2));
+      expect(delegatingMap['c'], isNull);
+    });
+
+    test('[]=', () {
+      delegatingMap['a'] = 3;
+      delegatingMap['c'] = 4;
+      expect(delegatingMap, equals({'a': 3, 'bb': 2, 'c': 4}));
+    });
+
+    test('addAll', () {
+      delegatingMap.addAll({'a': 3, 'c': 4});
+      expect(delegatingMap, equals({'a': 3, 'bb': 2, 'c': 4}));
+    });
+
+    test('clear', () {
+      delegatingMap.clear();
+      expect(delegatingMap, equals({}));
+    });
+
+    test('containsKey', () {
+      expect(delegatingMap.containsKey('a'), isTrue);
+      expect(delegatingMap.containsKey('b'), isFalse);
+    });
+
+    test('containsValue', () {
+      expect(delegatingMap.containsValue(1), isTrue);
+      expect(delegatingMap.containsValue('b'), isFalse);
+    });
+
+    test('forEach', () {
+      final s = new StringBuffer();
+      delegatingMap.forEach((k, v) => s.write('$k$v'));
+      expect(s.toString(), equals('a1bb2'));
+    });
+
+    test('isEmpty', () {
+      expect(delegatingMap.isEmpty, isFalse);
+      expect(new MyMap({}).isEmpty, isTrue);
+    });
+
+    test('isNotEmpty', () {
+      expect(delegatingMap.isNotEmpty, isTrue);
+      expect(new MyMap({}).isNotEmpty, isFalse);
+    });
+
+    test('keys', () {
+      expect(delegatingMap.keys, equals(['a', 'bb']));
+    });
+
+    test('length', () {
+      expect(delegatingMap.length, equals(2));
+      expect(new MyMap({}).length, equals(0));
+    });
+
+    test('putIfAbsent', () {
+      expect(delegatingMap.putIfAbsent('c', () => 4), equals(4));
+      expect(delegatingMap.putIfAbsent('c', () => throw ''), equals(4));
+    });
+
+    test('remove', () {
+      expect(delegatingMap.remove('a'), equals(1));
+      expect(delegatingMap, equals({'bb': 2}));
+    });
+
+    test('values', () {
+      expect(delegatingMap.values, equals([1, 2]));
+    });
+  });
+}