我正在写一个颤动的应用程序,我在编写测试时遇到了这个问题.该方法应该将数据写入TextFields并点击一个按钮,将该数据保存在SharedPrefs中：
testWidgets('Click on login saves the credentials',(WidgetTester tester) async {
await tester.pumpWidget(MyApp());
await tester.enterText(find.byKey(Key('phoneInput')),'test');
await tester.enterText(find.byKey(Key('passwordInput')),'test');
await tester.tap(find.byIcon(Icons.lock));
SharedPreferences prefs = await SharedPreferences.getInstance();
expect(prefs.getString('phone'),'test');
expect(prefs.getString('password'),'test');
});
此测试将无法使用此错误获取SharedPreferences实例：
The following TimeoutException was thrown running a test: TimeoutException after 0:00:03.500000: The test exceeded the timeout. It may have hung. Consider using "addTime" to increase the timeout before expensive operations.
更新：似乎问题实际上不是超时,因为即使60秒,测试也无法解析SharedPreferences实例.
解决方法
你需要从shared_preferences模拟getAll(参考：
https://pub.dartlang.org/packages/shared_preferences)
这是示例代码：
import 'package:shared_preferences/shared_preferences.dart';
import 'package:flutter/services.dart'; // <-- needed for `MethodChannel`
void main() {
setUpAll(() {
const MethodChannel('plugins.flutter.io/shared_preferences')
.setMockMethodCallHandler((MethodCall methodCall) async {
if (methodCall.method == 'getAll') {
return <String,dynamic>{}; // set initial values here if desired
}
return null;
});
});
testWidgets('Click on login saves the credentials',(WidgetTester tester) async {
await tester.pumpWidget(MyApp());
await tester.enterText(find.byKey(Key('phoneInput')),'test');
});
}
原始答案：
testWidgets('Click on login saves the credentials',(WidgetTester tester) async {
final AutomatedTestWidgetsFlutterBinding binding = tester.binding;
binding.addTime(const Duration(seconds: 10)); // or longer if needed
await tester.pumpWidget(MyApp());
await tester.enterText(find.byKey(Key('phoneInput')),'test');
});
