// 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_test/flutter_test.dart'; import 'package:flutter/material.dart'; import 'package:flutter/widgets.dart'; void main() { bool tapped; Widget tapTarget; setUp(() { tapped = false; tapTarget = new GestureDetector( onTap: () { tapped = true; }, child: new SizedBox( width: 10.0, height: 10.0, child: new Text('target') ) ); }); testWidgets('ModalBarrier prevents interactions with widgets behind it', (WidgetTester tester) async { final Widget subject = new Stack( children: <Widget>[ tapTarget, new ModalBarrier(dismissable: false), ] ); await tester.pumpWidget(subject); await tester.tap(find.text('target')); await tester.pumpWidget(subject); expect(tapped, isFalse, reason: 'because the tap is prevented by ModalBarrier'); }); testWidgets('ModalBarrier does not prevent interactions with widgets in front of it', (WidgetTester tester) async { final Widget subject = new Stack( children: <Widget>[ new ModalBarrier(dismissable: false), tapTarget, ] ); await tester.pumpWidget(subject); await tester.tap(find.text('target')); await tester.pumpWidget(subject); expect(tapped, isTrue, reason: 'because the tap is not prevented by ModalBarrier'); }); testWidgets('ModalBarrier pops the Navigator when dismissed', (WidgetTester tester) async { final Map<String, WidgetBuilder> routes = <String, WidgetBuilder>{ '/': (BuildContext context) => new FirstWidget(), '/modal': (BuildContext context) => new SecondWidget(), }; await tester.pumpWidget(new MaterialApp(routes: routes)); // Initially the barrier is not visible expect(find.byKey(const ValueKey<String>('barrier')), findsNothing); // Tapping on X routes to the barrier await tester.tap(find.text('X')); await tester.pump(); // begin transition await tester.pump(const Duration(seconds: 1)); // end transition // Tap on the barrier to dismiss it await tester.tap(find.byKey(const ValueKey<String>('barrier'))); await tester.pump(); // begin transition await tester.pump(const Duration(seconds: 1)); // end transition expect(find.byKey(const ValueKey<String>('barrier')), findsNothing, reason: 'because the barrier was dismissed'); }); } class FirstWidget extends StatelessWidget { @override Widget build(BuildContext context) { return new GestureDetector( onTap: () { Navigator.pushNamed(context, '/modal'); }, child: new Container( child: new Text('X') ) ); } } class SecondWidget extends StatelessWidget { @override Widget build(BuildContext context) { return new ModalBarrier( key: const ValueKey<String>('barrier'), dismissable: true ); } }