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我在 ResoCoder 示例中使用 Wea​​therAPI 实现了一个应用程序。我现在想测试每个文本小部件是否显示正确的信息，但我已经找不到文本小部件（我使用了本指南https://resocoder.com/2021/01/02/flutter-integration-test-tutorial-firebase -test-lab-codemagic/）。我通过使用 find.byKey() （当然之前设置了一些键）和 find.byText() 进行了尝试，但没有一个起作用。

我的测试代码：

testWidgets('Infos are displayed', (WidgetTester tester) async {
      await tester.pumpWidget(MaterialApp(home: WeatherScreen()));
      await tester.pump();
      final tempField = find.byKey(ValueKey("temperature"));
      
      expect(tempField, findsOneWidget);
      expect(find.text('humidity'), findsOneWidget);
    });

我总是收到没有找到那些小部件的错误：

══╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞════════════════════════════════════════════════
The following TestFailure object was thrown running a test:
  Expected: exactly one matching node in the widget tree
  Actual: _KeyFinder:<zero widgets with key [<'temperature'>] (ignoring offstage widgets)>
   Which: means none were found but one was expected

还有我的屏幕小部件：

class WeatherScreen extends StatelessWidget {Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
          child: BlocBuilder<WeatherCubit, WeatherBaseState>(
        bloc: WeatherCubit(weatherRepository: WeatherRepository())..getWeather(),
        builder: (context, state) {
          if (state is LoadingWeather) {
            return CircularProgressIndicator();
          } else if (state is WeatherLoaded) {
            return Column(my widget stuff with text widgets to be found);
}
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1 回答 1

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天气屏幕使用BlocBuilder并且在测试时，您没有向此小部件提供任何 BLoC。你应该做的是用 BlocProvider 包装你的MaterialApporWeatherScreen并提供你的WeatherCubit，例如：

await tester.pumpWidget(
  MaterialApp(home: 
    BlocProvider<WeatherCubit>.value(
      value: weatherCubit,
      child: WeatherScreen(),
    )
  ),
);

在此之前，您还应该模拟该weatherCubit值并定义想要的状态。你可以在这里找到一个简单的例子：https ://github.com/felangel/bloc/blob/master/examples/flutter_counter/test/counter/view/counter_view_test.dart

于 2021-05-15T09:28:46.300 回答