dev/manual_tests/test/color_testing_demo_test.dart

// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';

import '../lib/color_testing_demo.dart' as color_testing_demo;

void main() {
  testWidgets("Color testing demo smoke test", (WidgetTester tester) async {
    color_testing_demo.main(); // builds the app and schedules a frame but doesn't trigger one
    await tester.pump(); // see https://github.com/flutter/flutter/issues/1865
    await tester.pump(); // triggers a frame

    await tester.dragFrom(const Offset(0.0, 500.0), const Offset(0.0, 0.0)); // scrolls down
    await tester.pump();

    await tester.dragFrom(const Offset(0.0, 500.0), const Offset(0.0, 0.0)); // scrolls down
    await tester.pump();
  });
}