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// 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/scheduler.dart';
import 'package:flutter_test/flutter_test.dart';
void main() {
testWidgets('Scrollbar doesn\'t show when tapping list', (WidgetTester tester) async {
await tester.pumpWidget(
new Center(
child: new Container(
decoration: new BoxDecoration(
border: new Border.all(color: const Color(0xFFFFFF00))
),
height: 200.0,
width: 300.0,
child: new Scrollbar(
child: new ListView(
children: <Widget>[
new Container(height: 40.0, child: new Text('0')),
new Container(height: 40.0, child: new Text('1')),
new Container(height: 40.0, child: new Text('2')),
new Container(height: 40.0, child: new Text('3')),
new Container(height: 40.0, child: new Text('4')),
new Container(height: 40.0, child: new Text('5')),
new Container(height: 40.0, child: new Text('6')),
new Container(height: 40.0, child: new Text('7')),
]
)
)
)
)
);
SchedulerBinding.instance.debugAssertNoTransientCallbacks('Building a list with a scrollbar triggered an animation.');
await tester.tap(find.byType(ListView));
SchedulerBinding.instance.debugAssertNoTransientCallbacks('Tapping a block with a scrollbar triggered an animation.');
await tester.pump(const Duration(milliseconds: 200));
await tester.pump(const Duration(milliseconds: 200));
await tester.pump(const Duration(milliseconds: 200));
await tester.pump(const Duration(milliseconds: 200));
await tester.scroll(find.byType(ListView), const Offset(0.0, -10.0));
expect(SchedulerBinding.instance.transientCallbackCount, greaterThan(0));
await tester.pump(const Duration(milliseconds: 200));
await tester.pump(const Duration(milliseconds: 200));
await tester.pump(const Duration(milliseconds: 200));
await tester.pump(const Duration(milliseconds: 200));
});
}