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https://github.com/flutter/flutter
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36 lines
1.1 KiB
Dart
36 lines
1.1 KiB
Dart
// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:async';
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import 'package:flutter_tools/src/base/utils.dart';
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import 'package:test/test.dart';
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void main() {
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group('ItemListNotifier', () {
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test('sends notifications', () async {
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final ItemListNotifier<String> list = new ItemListNotifier<String>();
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expect(list.items, isEmpty);
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final Future<List<String>> addedStreamItems = list.onAdded.toList();
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final Future<List<String>> removedStreamItems = list.onRemoved.toList();
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list.updateWithNewList(<String>['aaa']);
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list.updateWithNewList(<String>['aaa', 'bbb']);
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list.updateWithNewList(<String>['bbb']);
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list.dispose();
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final List<String> addedItems = await addedStreamItems;
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final List<String> removedItems = await removedStreamItems;
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expect(addedItems.length, 2);
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expect(addedItems.first, 'aaa');
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expect(addedItems[1], 'bbb');
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expect(removedItems.length, 1);
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expect(removedItems.first, 'aaa');
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});
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});
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}
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