Add toString() to all CopyOnWrite collections.

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## 1.0.1
 
 - Make map operator[] take Object instead of K, as SDK collections do.
+- Fix toString for result of toList, toSet, toMap.
 
 ## 1.0.0
 

lib/src/internal/copy_on_write_list.dart

@@ -234,6 +234,9 @@ class CopyOnWriteList<E> implements List<E> {
     _list.replaceRange(start, end, iterable);
   }
 
+  @override
+  String toString() => _list.toString();
+
   // Internal.
 
   void _maybeCopyBeforeWrite() {

lib/src/internal/copy_on_write_map.dart

@@ -71,6 +71,9 @@ class CopyOnWriteMap<K, V> implements Map<K, V> {
     return _map.remove(key);
   }
 
+  @override
+  String toString() => _map.toString();
+
   // Internal.
 
   void _maybeCopyBeforeWrite() {

lib/src/internal/copy_on_write_set.dart

@@ -160,6 +160,9 @@ class CopyOnWriteSet<E> implements Set<E> {
     _set.retainAll(elements);
   }
 
+  @override
+  String toString() => _set.toString();
+
   // Internal.
 
   void _maybeCopyBeforeWrite() {

test/all_tests.dart

@@ -4,6 +4,9 @@
 
 library built_collection.test.all_tests;
 
+import 'internal/copy_on_write_list_test.dart' as copy_on_write_list_test;
+import 'internal/copy_on_write_map_test.dart' as copy_on_write_map_test;
+import 'internal/copy_on_write_set_test.dart' as copy_on_write_set_test;
 import 'list/built_list_test.dart' as built_list_test;
 import 'list/list_builder_test.dart' as list_builder_test;
 import 'list_multimap/built_list_multimap_test.dart'
@@ -19,6 +22,10 @@ import 'set_multimap/set_multimap_builder_test.dart'
     as set_multimap_builder_test;
 
 void main() {
+  copy_on_write_list_test.main();
+  copy_on_write_map_test.main();
+  copy_on_write_set_test.main();
+
   built_list_test.main();
   list_builder_test.main();
 

test/internal/copy_on_write_list_test.dart

@@ -0,0 +1,15 @@
+// Copyright (c) 2016, Google Inc. 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:built_collection/src/internal/copy_on_write_list.dart';
+import 'package:unittest/unittest.dart';
+
+void main() {
+  group('CopyOnWriteList', () {
+    test('has toString equal to List.toString', () {
+      final list = <int>[1, 2, 3];
+      expect(new CopyOnWriteList(list, false).toString(), list.toString());
+    });
+  });
+}

test/internal/copy_on_write_map_test.dart

@@ -0,0 +1,15 @@
+// Copyright (c) 2016, Google Inc. 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:built_collection/src/internal/copy_on_write_map.dart';
+import 'package:unittest/unittest.dart';
+
+void main() {
+  group('CopyOnWriteMap', () {
+    test('has toString equal to Map.toString', () {
+      final map = <int, String>{1: 'one', 2: 'two', 3: 'three'};
+      expect(new CopyOnWriteMap(map).toString(), map.toString());
+    });
+  });
+}

test/internal/copy_on_write_set_test.dart

@@ -0,0 +1,15 @@
+// Copyright (c) 2016, Google Inc. 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:built_collection/src/internal/copy_on_write_set.dart';
+import 'package:unittest/unittest.dart';
+
+void main() {
+  group('CopyOnWriteSet', () {
+    test('has toString equal to Set.toString', () {
+      final set = new Set<int>.from([1, 2, 3]);
+      expect(new CopyOnWriteSet(set).toString(), set.toString());
+    });
+  });
+}