| // 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 'package:flutter/material.dart'; |
| import 'package:flutter_api_samples/widgets/basic/overflowbox.0.dart' as example; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| void main() { |
| testWidgets('OverflowBox allows child widget to overflow parent container', (WidgetTester tester) async { |
| const Size containerSize = Size(100, 100); |
| const Size maxSize = Size(200, 200); |
| |
| await tester.pumpWidget( |
| const example.OverflowBoxApp(), |
| ); |
| |
| // The parent container has fixed width and height of 100 pixels. |
| expect(tester.getSize(find.byType(Container).first), containerSize); |
| |
| final OverflowBox overflowBox = tester.widget(find.byType(OverflowBox)); |
| // The OverflowBox imposes its own constraints of maxWidth and maxHeight of |
| // 200 on its child which allows the child to overflow the parent container. |
| expect(overflowBox.maxWidth, maxSize.width); |
| expect(overflowBox.maxHeight, maxSize.height); |
| |
| // The child widget overflows the parent container. |
| expect(tester.getSize(find.byType(FlutterLogo)), greaterThan(containerSize)); |
| expect(tester.getSize(find.byType(FlutterLogo)), maxSize); |
| }); |
| } |