Files
flutter-go/packages/flutter_web/test/widgets/scroll_interaction_test.dart
2019-08-13 20:38:46 +08:00

42 lines
1.3 KiB
Dart

// Copyright 2015 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_web_test/flutter_web_test.dart';
import 'package:flutter_web/widgets.dart';
void main() {
testWidgets('Scroll flings twice in a row does not crash',
(WidgetTester tester) async {
await tester.pumpWidget(
new Directionality(
textDirection: TextDirection.ltr,
child: new ListView(
children: <Widget>[new Container(height: 100000.0)],
),
),
);
final ScrollableState scrollable =
tester.state<ScrollableState>(find.byType(Scrollable));
expect(scrollable.position.pixels, equals(0.0));
await tester.flingFrom(
const Offset(200.0, 300.0), const Offset(0.0, -200.0), 500.0);
await tester.pump();
await tester.pump(const Duration(seconds: 5));
expect(scrollable.position.pixels, greaterThan(0.0));
final double oldOffset = scrollable.position.pixels;
await tester.flingFrom(
const Offset(200.0, 300.0), const Offset(0.0, -200.0), 500.0);
await tester.pump();
await tester.pump(const Duration(seconds: 5));
expect(scrollable.position.pixels, greaterThan(oldOffset));
});
}