1// Copyright 2014 The Flutter Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5import 'package:flutter/material.dart';
6import 'package:flutter_api_samples/widgets/basic/overflowbox.0.dart' as example;
7import 'package:flutter_test/flutter_test.dart';
8
9void main() {
10 testWidgets('OverflowBox allows child widget to overflow parent container', (
11 WidgetTester tester,
12 ) async {
13 const Size containerSize = Size(100, 100);
14 const Size maxSize = Size(200, 200);
15
16 await tester.pumpWidget(const example.OverflowBoxApp());
17
18 // The parent container has fixed width and height of 100 pixels.
19 expect(tester.getSize(find.byType(Container).first), containerSize);
20
21 final OverflowBox overflowBox = tester.widget(find.byType(OverflowBox));
22 // The OverflowBox imposes its own constraints of maxWidth and maxHeight of
23 // 200 on its child which allows the child to overflow the parent container.
24 expect(overflowBox.maxWidth, maxSize.width);
25 expect(overflowBox.maxHeight, maxSize.height);
26
27 // The child widget overflows the parent container.
28 expect(tester.getSize(find.byType(FlutterLogo)), greaterThan(containerSize));
29 expect(tester.getSize(find.byType(FlutterLogo)), maxSize);
30 });
31}
32

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