| // Copyright 2014 The Flutter 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 'dart:ui'; |
| |
| import 'package:flutter/widgets.dart'; |
| import 'package:flutter_test/flutter_test.dart'; |
| import 'package:flutter/material.dart'; |
| |
| void main() { |
| testWidgets("BackdropFilter's cull rect does not shrink", (WidgetTester tester) async { |
| tester.binding.addTime(const Duration(seconds: 15)); |
| await tester.pumpWidget( |
| MaterialApp( |
| home: Scaffold( |
| body: Stack( |
| fit: StackFit.expand, |
| children: <Widget>[ |
| Text('0 0 ' * 10000), |
| Center( |
| // ClipRect needed for filtering the 200x200 area instead of the |
| // whole screen. |
| child: ClipRect( |
| child: BackdropFilter( |
| filter: ImageFilter.blur( |
| sigmaX: 5.0, |
| sigmaY: 5.0, |
| ), |
| child: Container( |
| alignment: Alignment.center, |
| width: 200.0, |
| height: 200.0, |
| child: const Text('Hello World'), |
| ), |
| ), |
| ), |
| ), |
| ], |
| ), |
| ), |
| ), |
| ); |
| await expectLater( |
| find.byType(RepaintBoundary).first, |
| matchesGoldenFile('backdrop_filter_test.cull_rect.png'), |
| ); |
| }); |
| } |