| // Copyright 2013 The Flutter Authors. 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:flutter_test/flutter_test.dart'; |
| import 'package:integration_test/integration_test.dart'; |
| import 'package:shared_preferences/shared_preferences.dart'; |
| |
| void main() { |
| IntegrationTestWidgetsFlutterBinding.ensureInitialized(); |
| |
| group('$SharedPreferences', () { |
| const String testString = 'hello world'; |
| const bool testBool = true; |
| const int testInt = 42; |
| const double testDouble = 3.14159; |
| const List<String> testList = <String>['foo', 'bar']; |
| |
| const String testString2 = 'goodbye world'; |
| const bool testBool2 = false; |
| const int testInt2 = 1337; |
| const double testDouble2 = 2.71828; |
| const List<String> testList2 = <String>['baz', 'quox']; |
| |
| late SharedPreferences preferences; |
| |
| setUp(() async { |
| preferences = await SharedPreferences.getInstance(); |
| }); |
| |
| tearDown(() { |
| preferences.clear(); |
| }); |
| |
| testWidgets('reading', (WidgetTester _) async { |
| expect(preferences.get('String'), isNull); |
| expect(preferences.get('bool'), isNull); |
| expect(preferences.get('int'), isNull); |
| expect(preferences.get('double'), isNull); |
| expect(preferences.get('List'), isNull); |
| expect(preferences.getString('String'), isNull); |
| expect(preferences.getBool('bool'), isNull); |
| expect(preferences.getInt('int'), isNull); |
| expect(preferences.getDouble('double'), isNull); |
| expect(preferences.getStringList('List'), isNull); |
| }); |
| |
| testWidgets('writing', (WidgetTester _) async { |
| await Future.wait(<Future<bool>>[ |
| preferences.setString('String', testString2), |
| preferences.setBool('bool', testBool2), |
| preferences.setInt('int', testInt2), |
| preferences.setDouble('double', testDouble2), |
| preferences.setStringList('List', testList2) |
| ]); |
| expect(preferences.getString('String'), testString2); |
| expect(preferences.getBool('bool'), testBool2); |
| expect(preferences.getInt('int'), testInt2); |
| expect(preferences.getDouble('double'), testDouble2); |
| expect(preferences.getStringList('List'), testList2); |
| }); |
| |
| testWidgets('removing', (WidgetTester _) async { |
| const String key = 'testKey'; |
| await preferences.setString(key, testString); |
| await preferences.setBool(key, testBool); |
| await preferences.setInt(key, testInt); |
| await preferences.setDouble(key, testDouble); |
| await preferences.setStringList(key, testList); |
| await preferences.remove(key); |
| expect(preferences.get('testKey'), isNull); |
| }); |
| |
| testWidgets('clearing', (WidgetTester _) async { |
| await preferences.setString('String', testString); |
| await preferences.setBool('bool', testBool); |
| await preferences.setInt('int', testInt); |
| await preferences.setDouble('double', testDouble); |
| await preferences.setStringList('List', testList); |
| await preferences.clear(); |
| expect(preferences.getString('String'), null); |
| expect(preferences.getBool('bool'), null); |
| expect(preferences.getInt('int'), null); |
| expect(preferences.getDouble('double'), null); |
| expect(preferences.getStringList('List'), null); |
| }); |
| |
| testWidgets('simultaneous writes', (WidgetTester _) async { |
| final List<Future<bool>> writes = <Future<bool>>[]; |
| const int writeCount = 100; |
| for (int i = 1; i <= writeCount; i++) { |
| writes.add(preferences.setInt('int', i)); |
| } |
| final List<bool> result = await Future.wait(writes, eagerError: true); |
| // All writes should succeed. |
| expect(result.where((bool element) => !element), isEmpty); |
| // The last write should win. |
| expect(preferences.getInt('int'), writeCount); |
| }); |
| }); |
| } |