examples/flutter_gallery/test/simple_smoke_test.dart

// Copyright 2016 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 'package:flutter_gallery/gallery/app.dart' show GalleryApp;

void main() {
  final TestWidgetsFlutterBinding binding = TestWidgetsFlutterBinding.ensureInitialized();
  if (binding is LiveTestWidgetsFlutterBinding)
    binding.framePolicy = LiveTestWidgetsFlutterBindingFramePolicy.fullyLive;

  testWidgets('Flutter Gallery app simple smoke test', (WidgetTester tester) async {
    await tester.pumpWidget(
      const GalleryApp(testMode: true) // 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

    final Finder showOptionsPageButton = find.byTooltip('Toggle options page');

    // Show the options page
    await tester.tap(showOptionsPageButton);
    await tester.pumpAndSettle();

    // Switch to the dark theme: the first switch control
    await tester.tap(find.byType(Switch).first);
    await tester.pumpAndSettle();

    // Close the options page
    expect(showOptionsPageButton, findsOneWidget);
    await tester.tap(showOptionsPageButton);
    await tester.pumpAndSettle();

    // Show the studies (aka "vignettes", aka "demos")
    await tester.tap(find.text('Studies'));
    await tester.pumpAndSettle();

    // Show the Contact profile demo and scroll it upwards
    await tester.tap(find.text('Contact profile'));
    await tester.pumpAndSettle();

    await tester.drag(find.text('(650) 555-1234'), const Offset(0.0, -50.0));
    await tester.pump(const Duration(milliseconds: 200));
    await tester.drag(find.text('(650) 555-1234'), const Offset(0.0, -50.0));
    await tester.pump(const Duration(milliseconds: 200));
    await tester.drag(find.text('(650) 555-1234'), const Offset(0.0, -50.0));
    await tester.pump(const Duration(milliseconds: 200));
    await tester.drag(find.text('(650) 555-1234'), const Offset(0.0, -50.0));
    await tester.pump(const Duration(milliseconds: 200));
    await tester.drag(find.text('(650) 555-1234'), const Offset(0.0, -50.0));
    await tester.pump(const Duration(milliseconds: 200));
    await tester.drag(find.text('(650) 555-1234'), const Offset(0.0, -50.0));
    await tester.pump(const Duration(milliseconds: 200));

    await tester.pump(const Duration(hours: 100)); // for testing
  });
}