flutter - 在提供者的消费者小部件内的测试中找不到小部件

Question

我为我的小部件创建了以下 Flutter 测试

testWidgets("", (WidgetTester tester) async {
      await tester.pumpWidget(
        ChangeNotifierProvider<SettingsViewProvider>(
          create: (context) => SettingsViewProvider(),
          child: MaterialApp(
            localizationsDelegates: [S.delegate],
            home: SettingsScreen(),
          ),
        ),
      );

      final textFormFieldFinder = find.byElementType(TextFormField);
      await tester.pump();
      expect(textFormFieldFinder, findsNWidgets(3));
    });

该小部件是一个有状态的小部件，它使用 ChangeNotifierProvider 并且消费者围绕着一个包含三个“TextFormFields”的列表。

Consumer<State>(
   builder: (context, value, child)=> Column(
       children: [TextFormField(...), TextFormField(...), TextFormField(...)];
   )
)

Expected: exactly 3 matching nodes in the widget tree

Actual: _ElementTypeFinder:

Which: means none were found but some were expected

不幸的是，我收到在小部件树中找不到小部件。

Answer 1

似乎可以使用以下方法解决:

final textFormFieldFinder = find.byType(TextFormField);

代替:

final textFormFieldFinder = find.byElementType(TextFormField);