// This test is from a particularly slow to format part of:
//
// flutter/packages/test/material/scrollbar_test.dart.
void main() {
  testWidgets(
    "Scrollbar doesn't show when scroll the inner scrollable widget",
    (WidgetTester tester) async {
      await tester.pumpWidget(
        Directionality(
          textDirection: TextDirection.ltr,
          child: MediaQuery(
            data: const MediaQueryData(),
            child: ScrollConfiguration(
              behavior: const NoScrollbarBehavior(),
              child: Scrollbar(
                key: key2,
                child: SingleChildScrollView(
                  key: outerKey,
                  child: SizedBox(
                    height: 1000.0,
                    width: double.infinity,
                    child: Column(
                      children: <Widget>[
                        Scrollbar(
                          key: key1,
                          child: SizedBox(
                            height: 300.0,
                            width: double.infinity,
                            child: SingleChildScrollView(
                              key: innerKey,
                              child: const SizedBox(
                                key: Key('Inner scrollable'),
                                height: 1000.0,
                                width: double.infinity,
                              ),
                            ),
                          ),
                        ),
                      ],
                    ),
                  ),
                ),
              ),
            ),
          ),
        ),
      );
    },
    variant: TargetPlatformVariant.all(),
  );
}