Flutter:如何在测试中访问/检查小部件的属性？

import 'package:flutter_test/flutter_test.dart';

void main() {
  testWidgets('Widget attribute test', (WidgetTester tester) async {
    // 测试代码
  });
}

void main() {
  testWidgets('Widget attribute test', (WidgetTester tester) async {
    // 创建小部件
    final widget = MyWidget();

    // 将小部件添加到测试环境中
    await tester.pumpWidget(widget);

    // 访问和检查小部件的属性
    expect(find.text('Hello'), findsOneWidget);
    expect(find.byKey(Key('button')), findsOneWidget);
    expect(tester.widget<Text>(find.text('Hello')).style.color, Colors.red);
  });
}