| // Copyright (c) 2011, 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. |
| |
| library map.from.test; |
| |
| import "package:expect/expect.dart"; |
| import 'dart:collection'; |
| |
| main() { |
| testWithConstMap(); |
| testWithNonConstMap(); |
| testWithHashMap(); |
| testWithLinkedMap(); |
| } |
| |
| testWithConstMap() { |
| var map = const {'b': 42, 'a': 43}; |
| var otherMap = new Map<String, int>.from(map); |
| Expect.isTrue(otherMap is Map); |
| Expect.isTrue(otherMap is LinkedHashMap); |
| |
| Expect.equals(2, otherMap.length); |
| Expect.equals(2, otherMap.keys.length); |
| Expect.equals(2, otherMap.values.length); |
| |
| int count(Map<String, int> map) { |
| int cnt = 0; |
| map.forEach((a, b) { |
| cnt += b; |
| }); |
| return cnt; |
| }; |
| |
| Expect.equals(42 + 43, count(map)); |
| Expect.equals(count(map), count(otherMap)); |
| } |
| |
| testWithNonConstMap() { |
| var map = {'b': 42, 'a': 43}; |
| var otherMap = new Map<String, int>.from(map); |
| Expect.isTrue(otherMap is Map); |
| Expect.isTrue(otherMap is LinkedHashMap); |
| |
| Expect.equals(2, otherMap.length); |
| Expect.equals(2, otherMap.keys.length); |
| Expect.equals(2, otherMap.values.length); |
| |
| int count(Map<String, int> map) { |
| int count = 0; |
| map.forEach((a, b) { |
| count += b; |
| }); |
| return count; |
| } |
| |
| ; |
| |
| Expect.equals(42 + 43, count(map)); |
| Expect.equals(count(map), count(otherMap)); |
| |
| // Test that adding to the original map does not change otherMap. |
| map['c'] = 44; |
| Expect.equals(3, map.length); |
| Expect.equals(2, otherMap.length); |
| Expect.equals(2, otherMap.keys.length); |
| Expect.equals(2, otherMap.values.length); |
| |
| // Test that adding to otherMap does not change the original map. |
| otherMap['c'] = 44; |
| Expect.equals(3, map.length); |
| Expect.equals(3, otherMap.length); |
| Expect.equals(3, otherMap.keys.length); |
| Expect.equals(3, otherMap.values.length); |
| } |
| |
| testWithHashMap() { |
| var map = const {'b': 1, 'a': 2, 'c': 3}; |
| var otherMap = new HashMap.from(map); |
| Expect.isTrue(otherMap is Map); |
| Expect.isTrue(otherMap is HashMap); |
| var i = 1; |
| for (var val in map.values) { |
| Expect.equals(i++, val); |
| } |
| } |
| |
| testWithLinkedMap() { |
| var map = const {'b': 1, 'a': 2, 'c': 3}; |
| var otherMap = new LinkedHashMap.from(map); |
| Expect.isTrue(otherMap is Map); |
| Expect.isTrue(otherMap is LinkedHashMap); |
| var i = 1; |
| for (var val in map.values) { |
| Expect.equals(i++, val); |
| } |
| } |