如何在构建方法或回调中测试断言？

我有 2 个小部件

1 在assert其build方法中：

class MyWidget1 extends StatelessWidget {
  const MyWidget1({super.key});

  @override
  Widget build(BuildContext context) {
    assert(false);
    return const Placeholder();
  }
}

1.assert在按钮的回调中：

class MyWidget2 extends StatelessWidget {
  const MyWidget2({super.key});

  @override
  Widget build(BuildContext context) {
    return TextButton(
      onPressed: () {
        assert(false);
      },
      child: const Text('button'),
    );
  }
}

我想要一个测试来验证是否assert抛出了。从这个问题开始，我尝试了：

void main() {
  testWidgets('It should throw an assert error during the build',
      (WidgetTester tester) async {
    await expectLater(
      () => tester.pumpWidget(const MaterialApp(home: MyWidget1())),
      throwsA(isA<AssertionError>()),
    );
  });

  testWidgets('It should throw an assert error on tap',
      (WidgetTester tester) async {
    await tester.pumpWidget(const MaterialApp(
      home: Scaffold(
        body: MyWidget2(),
      ),
    ));
    await expectLater(
      () async {
        await tester.tap(find.byType(TextButton));
        await tester.pumpAndSettle();
      },
      throwsAssertionError,
    );
  });
}

但错误并没有被预期捕获。

如何测试？