testWidgets('LayoutBuilder rebuids twice', (WidgetTester tester) async {
    int built = 0;
    final target = LayoutBuilder(
      builder: (context, constraints) {
        return Builder(builder: (context) {
          built += 1;
          MediaQuery.of(context);
          return const Placeholder();
        });
      },
    );
    expect(built, 0);

    await tester.pumpWidget(MediaQuery(
      data: const MediaQueryData(size: Size(400.0, 300.0)),
      child: Center(
        child: SizedBox(
          width: 400.0,
          child: target,
        ),
      ),
    ));
    expect(built, 1);

    await tester.pumpWidget(MediaQuery(
      data: const MediaQueryData(size: Size(300.0, 400.0)),
      child: Center(
        child: SizedBox(
          width: 300.0,
          child: target,
        ),
      ),
    ));
    expect(built, 2);
  });