// 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/widgets.dart'; import 'package:flutter_test/flutter_test.dart'; void main() { testWidgets('StatefulWidget BuildContext.mounted', (WidgetTester tester) async { late BuildContext capturedContext; await tester.pumpWidget(TestStatefulWidget( onBuild: (BuildContext context) { capturedContext = context; } )); expect(capturedContext.mounted, isTrue); await tester.pumpWidget(Container()); expect(capturedContext.mounted, isFalse); }); testWidgets('StatelessWidget BuildContext.mounted', (WidgetTester tester) async { late BuildContext capturedContext; await tester.pumpWidget(TestStatelessWidget( onBuild: (BuildContext context) { capturedContext = context; } )); expect(capturedContext.mounted, isTrue); await tester.pumpWidget(Container()); expect(capturedContext.mounted, isFalse); }); } typedef BuildCallback = void Function(BuildContext); class TestStatelessWidget extends StatelessWidget { const TestStatelessWidget({super.key, required this.onBuild}); final BuildCallback onBuild; @override Widget build(BuildContext context) { onBuild(context); return Container(); } } class TestStatefulWidget extends StatefulWidget { const TestStatefulWidget({super.key, required this.onBuild}); final BuildCallback onBuild; @override State<TestStatefulWidget> createState() => _TestStatefulWidgetState(); } class _TestStatefulWidgetState extends State<TestStatefulWidget> { @override Widget build(BuildContext context) { widget.onBuild(context); return Container(); } }