import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple)),
      home: Scaffold(
        body: Column(
          children: [
            Semantics(
              label: 'first parent semantics label',
              explicitChildNodes: true,
              child: FormField(
                builder: (field) => Semantics(label: 'failing child semantics label', child: Container(height: 40)),
              ),
            ),
            Semantics(
              label: 'second parent semantics label',
              explicitChildNodes: true,
              child: Semantics(label: 'successful child semantics label', child: Container(height: 40)),
            ),
          ],
        ),
      ),
    );
  }
}

import 'package:flutter/rendering.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:semantics/main.dart';

void main() {
  testWidgets('semantics broken', (WidgetTester tester) async {
    await tester.pumpWidget(const MyApp());

    debugDumpSemanticsTree();

    expect(
      tester.semantics.simulatedAccessibilityTraversal(),
      containsOnce(containsSemantics(label: 'failing child semantics label')),
    );
  });

  testWidgets('semantics successfully', (WidgetTester tester) async {
    await tester.pumpWidget(const MyApp());

    debugDumpSemanticsTree();
    expect(
      tester.semantics.simulatedAccessibilityTraversal(),
      containsOnce(containsSemantics(label: 'successful child semantics label')),
    );
  });
}