[shared_preferences] Switch to new analysis options (flutter#4384)

packages/shared_preferences/shared_preferences/CHANGELOG.md

@@ -1,3 +1,7 @@
+## NEXT
+
+* Fixes newly enabled analyzer options.
+
 ## 2.0.8
 
 * Update minimum Flutter SDK to 2.5 and iOS deployment target to 9.0.

packages/shared_preferences/shared_preferences/example/integration_test/shared_preferences_test.dart

@@ -4,30 +4,27 @@
 
 import 'dart:async';
 import 'dart:io';
+
 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:shared_preferences/shared_preferences.dart';
 import 'package:integration_test/integration_test.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 
 void main() {
   IntegrationTestWidgetsFlutterBinding.ensureInitialized();
 
   group('$SharedPreferences', () {
-    const Map<String, dynamic> kTestValues = <String, dynamic>{
-      'flutter.String': 'hello world',
-      'flutter.bool': true,
-      'flutter.int': 42,
-      'flutter.double': 3.14159,
-      'flutter.List': <String>['foo', 'bar'],
-    };
+    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 Map<String, dynamic> kTestValues2 = <String, dynamic>{
-      'flutter.String': 'goodbye world',
-      'flutter.bool': false,
-      'flutter.int': 1337,
-      'flutter.double': 2.71828,
-      'flutter.List': <String>['baz', 'quox'],
-    };
+    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;
 
@@ -54,36 +51,36 @@ void main() {
 
     testWidgets('writing', (WidgetTester _) async {
       await Future.wait(<Future<bool>>[
-        preferences.setString('String', kTestValues2['flutter.String']),
-        preferences.setBool('bool', kTestValues2['flutter.bool']),
-        preferences.setInt('int', kTestValues2['flutter.int']),
-        preferences.setDouble('double', kTestValues2['flutter.double']),
-        preferences.setStringList('List', kTestValues2['flutter.List'])
+        preferences.setString('String', testString2),
+        preferences.setBool('bool', testBool2),
+        preferences.setInt('int', testInt2),
+        preferences.setDouble('double', testDouble2),
+        preferences.setStringList('List', testList2)
       ]);
-      expect(preferences.getString('String'), kTestValues2['flutter.String']);
-      expect(preferences.getBool('bool'), kTestValues2['flutter.bool']);
-      expect(preferences.getInt('int'), kTestValues2['flutter.int']);
-      expect(preferences.getDouble('double'), kTestValues2['flutter.double']);
-      expect(preferences.getStringList('List'), kTestValues2['flutter.List']);
+      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, kTestValues['flutter.String']);
-      await preferences.setBool(key, kTestValues['flutter.bool']);
-      await preferences.setInt(key, kTestValues['flutter.int']);
-      await preferences.setDouble(key, kTestValues['flutter.double']);
-      await preferences.setStringList(key, kTestValues['flutter.List']);
+      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', kTestValues['flutter.String']);
-      await preferences.setBool('bool', kTestValues['flutter.bool']);
-      await preferences.setInt('int', kTestValues['flutter.int']);
-      await preferences.setDouble('double', kTestValues['flutter.double']);
-      await preferences.setStringList('List', kTestValues['flutter.List']);
+      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);
@@ -94,13 +91,13 @@ void main() {
 
     testWidgets('simultaneous writes', (WidgetTester _) async {
       final List<Future<bool>> writes = <Future<bool>>[];
-      final int writeCount = 100;
+      const int writeCount = 100;
       for (int i = 1; i <= writeCount; i++) {
         writes.add(preferences.setInt('int', i));
       }
-      List<bool> result = await Future.wait(writes, eagerError: true);
+      final List<bool> result = await Future.wait(writes, eagerError: true);
       // All writes should succeed.
-      expect(result.where((element) => !element), isEmpty);
+      expect(result.where((bool element) => !element), isEmpty);
       // The last write should win.
       expect(preferences.getInt('int'), writeCount);
     });
@@ -112,28 +109,22 @@ void main() {
       // special prefixes plus a string value
       expect(
           // prefix for lists
-          preferences.setString(
-              'String',
-              'VGhpcyBpcyB0aGUgcHJlZml4IGZvciBhIGxpc3Qu' +
-                  kTestValues2['flutter.String']),
+          preferences.setString('String',
+              'VGhpcyBpcyB0aGUgcHJlZml4IGZvciBhIGxpc3Qu' + testString),
           throwsA(isA<PlatformException>()));
       await preferences.reload();
       expect(preferences.getString('String'), null);
       expect(
           // prefix for big integers
-          preferences.setString(
-              'String',
-              'VGhpcyBpcyB0aGUgcHJlZml4IGZvciBCaWdJbnRlZ2Vy' +
-                  kTestValues2['flutter.String']),
+          preferences.setString('String',
+              'VGhpcyBpcyB0aGUgcHJlZml4IGZvciBCaWdJbnRlZ2Vy' + testString),
           throwsA(isA<PlatformException>()));
       await preferences.reload();
       expect(preferences.getString('String'), null);
       expect(
           // prefix for doubles
-          preferences.setString(
-              'String',
-              'VGhpcyBpcyB0aGUgcHJlZml4IGZvciBEb3VibGUu' +
-                  kTestValues2['flutter.String']),
+          preferences.setString('String',
+              'VGhpcyBpcyB0aGUgcHJlZml4IGZvciBEb3VibGUu' + testString),
           throwsA(isA<PlatformException>()));
       await preferences.reload();
       expect(preferences.getString('String'), null);

packages/shared_preferences/shared_preferences/example/lib/main.dart

@@ -16,30 +16,30 @@ void main() {
 class MyApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return MaterialApp(
+    return const MaterialApp(
       title: 'SharedPreferences Demo',
       home: SharedPreferencesDemo(),
     );
   }
 }
 
 class SharedPreferencesDemo extends StatefulWidget {
-  SharedPreferencesDemo({Key? key}) : super(key: key);
+  const SharedPreferencesDemo({Key? key}) : super(key: key);
 
   @override
   SharedPreferencesDemoState createState() => SharedPreferencesDemoState();
 }
 
 class SharedPreferencesDemoState extends State<SharedPreferencesDemo> {
-  Future<SharedPreferences> _prefs = SharedPreferences.getInstance();
+  final Future<SharedPreferences> _prefs = SharedPreferences.getInstance();
   late Future<int> _counter;
 
   Future<void> _incrementCounter() async {
     final SharedPreferences prefs = await _prefs;
     final int counter = (prefs.getInt('counter') ?? 0) + 1;
 
     setState(() {
-      _counter = prefs.setInt("counter", counter).then((bool success) {
+      _counter = prefs.setInt('counter', counter).then((bool success) {
         return counter;
       });
     });
@@ -49,15 +49,15 @@ class SharedPreferencesDemoState extends State<SharedPreferencesDemo> {
   void initState() {
     super.initState();
     _counter = _prefs.then((SharedPreferences prefs) {
-      return (prefs.getInt('counter') ?? 0);
+      return prefs.getInt('counter') ?? 0;
     });
   }
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: const Text("SharedPreferences Demo"),
+        title: const Text('SharedPreferences Demo'),
       ),
       body: Center(
           child: FutureBuilder<int>(

packages/shared_preferences/shared_preferences/lib/shared_preferences.dart

@@ -50,7 +50,8 @@ class SharedPreferences {
   /// performance-sensitive blocks.
   static Future<SharedPreferences> getInstance() async {
     if (_completer == null) {
-      final completer = Completer<SharedPreferences>();
+      final Completer<SharedPreferences> completer =
+          Completer<SharedPreferences>();
       try {
         final Map<String, Object> preferencesMap =
             await _getSharedPreferencesMap();
@@ -188,7 +189,7 @@ class SharedPreferences {
     assert(fromSystem != null);
     // Strip the flutter. prefix from the returned preferences.
     final Map<String, Object> preferencesMap = <String, Object>{};
-    for (String key in fromSystem.keys) {
+    for (final String key in fromSystem.keys) {
       assert(key.startsWith(_prefix));
       preferencesMap[key.substring(_prefix.length)] = fromSystem[key]!;
     }