// 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/foundation.dart'; import 'package:flutter/material.dart'; import 'package:flutter/rendering.dart'; import 'package:flutter/widgets.dart'; import 'semantics_tester.dart'; void main() { bool tapped; Widget tapTarget; setUp(() { tapped = false; tapTarget = GestureDetector( onTap: () { tapped = true; }, child: const SizedBox( width: 10.0, height: 10.0, child: Text('target', textDirection: TextDirection.ltr), ), ); }); testWidgets('ModalBarrier prevents interactions with widgets behind it', (WidgetTester tester) async { final Widget subject = Stack( textDirection: TextDirection.ltr, children: <Widget>[ tapTarget, const ModalBarrier(dismissible: 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 = Stack( textDirection: TextDirection.ltr, children: <Widget>[ const ModalBarrier(dismissible: 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) => FirstWidget(), '/modal': (BuildContext context) => SecondWidget(), }; await tester.pumpWidget(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: 'The route should have been dismissed by tapping the barrier.'); }); testWidgets('ModalBarrier does not pop the Navigator with a WillPopScope that returns false', (WidgetTester tester) async { bool willPopCalled = false; final Map<String, WidgetBuilder> routes = <String, WidgetBuilder>{ '/': (BuildContext context) => FirstWidget(), '/modal': (BuildContext context) => Stack( children: <Widget>[ SecondWidget(), WillPopScope( child: const SizedBox(), onWillPop: () async { willPopCalled = true; return false; }, ), ],), }; await tester.pumpWidget(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 expect(willPopCalled, isFalse); // Tap on the barrier to attempt 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')), findsOneWidget, reason: 'The route should still be present if the pop is vetoed.'); expect(willPopCalled, isTrue); }); testWidgets('ModalBarrier pops the Navigator with a WillPopScope that returns true', (WidgetTester tester) async { bool willPopCalled = false; final Map<String, WidgetBuilder> routes = <String, WidgetBuilder>{ '/': (BuildContext context) => FirstWidget(), '/modal': (BuildContext context) => Stack( children: <Widget>[ SecondWidget(), WillPopScope( child: const SizedBox(), onWillPop: () async { willPopCalled = true; return true; }, ), ],), }; await tester.pumpWidget(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 expect(willPopCalled, isFalse); // Tap on the barrier to attempt 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: 'The route should not be present if the pop is permitted.'); expect(willPopCalled, isTrue); }); testWidgets('Undismissible ModalBarrier hidden in semantic tree', (WidgetTester tester) async { final SemanticsTester semantics = SemanticsTester(tester); await tester.pumpWidget(const ModalBarrier(dismissible: false)); final TestSemantics expectedSemantics = TestSemantics.root(); expect(semantics, hasSemantics(expectedSemantics)); semantics.dispose(); }); testWidgets('Dismissible ModalBarrier includes button in semantic tree on iOS', (WidgetTester tester) async { debugDefaultTargetPlatformOverride = TargetPlatform.iOS; final SemanticsTester semantics = SemanticsTester(tester); await tester.pumpWidget(const Directionality( textDirection: TextDirection.ltr, child: ModalBarrier( dismissible: true, semanticsLabel: 'Dismiss', ), )); final TestSemantics expectedSemantics = TestSemantics.root( children: <TestSemantics>[ TestSemantics.rootChild( rect: TestSemantics.fullScreen, actions: SemanticsAction.tap.index, label: 'Dismiss', textDirection: TextDirection.ltr, ), ] ); expect(semantics, hasSemantics(expectedSemantics, ignoreId: true)); semantics.dispose(); debugDefaultTargetPlatformOverride = null; }); testWidgets('Dismissible ModalBarrier is hidden on Android (back button is used to dismiss)', (WidgetTester tester) async { final SemanticsTester semantics = SemanticsTester(tester); await tester.pumpWidget(const ModalBarrier(dismissible: true)); final TestSemantics expectedSemantics = TestSemantics.root(); expect(semantics, hasSemantics(expectedSemantics)); semantics.dispose(); }); } class FirstWidget extends StatelessWidget { @override Widget build(BuildContext context) { return GestureDetector( onTap: () { Navigator.pushNamed(context, '/modal'); }, child: Container( child: const Text('X'), ), ); } } class SecondWidget extends StatelessWidget { @override Widget build(BuildContext context) { return const ModalBarrier( key: ValueKey<String>('barrier'), dismissible: true, ); } }