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import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
// import 'package:flutter_boost/container/boost_container.dart';
import 'package:flutter_test/flutter_test.dart';
class FirstWidget extends StatelessWidget {
@override
Widget build(BuildContext context) {
return GestureDetector(
onTap: () {
Navigator.pushNamed(context, '/second');
},
child: Container(
color: const Color(0xFFFFFF00),
child: const Text('X'),
),
);
}
}
class SecondWidget extends StatefulWidget {
@override
SecondWidgetState createState() => SecondWidgetState();
}
class SecondWidgetState extends State<SecondWidget> {
@override
Widget build(BuildContext context) {
return GestureDetector(
onTap: () => Navigator.pop(context),
child: Container(
color: const Color(0xFFFF00FF),
child: const Text('Y'),
),
);
}
}
typedef ExceptionCallback = void Function(dynamic exception);
class ThirdWidget extends StatelessWidget {
const ThirdWidget({this.targetKey, this.onException});
final Key targetKey;
final ExceptionCallback onException;
@override
Widget build(BuildContext context) {
return GestureDetector(
key: targetKey,
onTap: () {
try {
Navigator.of(context);
} catch (e) {
onException(e);
}
},
behavior: HitTestBehavior.opaque,
);
}
}
class OnTapPage extends StatelessWidget {
const OnTapPage({Key key, this.id, this.onTap}) : super(key: key);
final String id;
final VoidCallback onTap;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text('Page $id')),
body: GestureDetector(
onTap: onTap,
behavior: HitTestBehavior.opaque,
child: Container(
child: Center(
child: Text(id, style: Theme.of(context).textTheme.display2),
),
),
),
);
}
}
void main() {
TestWidgetsFlutterBinding.ensureInitialized();
testWidgets('Can navigator navigate to and from a stateful widget',
(WidgetTester tester) async {
final Map<String, WidgetBuilder> routes = <String, WidgetBuilder>{
'/': (BuildContext context) => FirstWidget(), // X
'/second': (BuildContext context) => SecondWidget(), // Y
};
await tester.pumpWidget(MaterialApp(routes: routes));
expect(find.text('X'), findsOneWidget);
expect(find.text('Y', skipOffstage: false), findsNothing);
await tester.tap(find.text('X'));
await tester.pump();
expect(find.text('X'), findsOneWidget);
expect(find.text('Y', skipOffstage: false), isOffstage);
await tester.pump(const Duration(milliseconds: 10));
expect(find.text('X'), findsOneWidget);
expect(find.text('Y'), findsOneWidget);
await tester.pump(const Duration(milliseconds: 10));
expect(find.text('X'), findsOneWidget);
expect(find.text('Y'), findsOneWidget);
await tester.pump(const Duration(milliseconds: 10));
expect(find.text('X'), findsOneWidget);
expect(find.text('Y'), findsOneWidget);
await tester.pump(const Duration(seconds: 1));
expect(find.text('X'), findsNothing);
expect(find.text('X', skipOffstage: false), findsOneWidget);
expect(find.text('Y'), findsOneWidget);
await tester.tap(find.text('Y'));
expect(find.text('X'), findsNothing);
expect(find.text('Y'), findsOneWidget);
await tester.pump();
await tester.pump();
expect(find.text('X'), findsOneWidget);
expect(find.text('Y'), findsOneWidget);
await tester.pump(const Duration(milliseconds: 10));
expect(find.text('X'), findsOneWidget);
expect(find.text('Y'), findsOneWidget);
await tester.pump(const Duration(seconds: 1));
expect(find.text('X'), findsOneWidget);
expect(find.text('Y', skipOffstage: false), findsNothing);
});
//
testWidgets('Navigator.of gracefully when not found in context',
(WidgetTester tester) async {
const Key targetKey = Key('foo');
dynamic exception;
final Widget widget = ThirdWidget(
targetKey: targetKey,
onException: (dynamic e) {
exception = e;
},
);
await tester.pumpWidget(widget);
await tester.pump(const Duration(seconds: 1));
await tester.tap(find.byKey(targetKey));
await tester.pump(const Duration(seconds: 1));
expect(exception, isInstanceOf<FlutterError>());
expect('$exception',
startsWith('Navigator operation requested with a context'));
});
//
// testWidgets('Navigator.of rootNavigator finds root Navigator',
// (WidgetTester tester) async {
// await tester.pumpWidget(MaterialApp(
// home: Material(
// child: Column(
// children: <Widget>[
// const SizedBox(
// height: 300.0,
// child: Text('Root page'),
// ),
// SizedBox(
// height: 300.0,
// child: Navigator(
// onGenerateRoute: (RouteSettings settings) {
// if (settings.isInitialRoute) {
// return MaterialPageRoute<void>(
// builder: (BuildContext context) {
// return RaisedButton(
// child: const Text('Next'),
// onPressed: () {
// BoostContainer.of(context).push(
// MaterialPageRoute<void>(
// builder: (BuildContext context) {
// return RaisedButton(
// child: const Text('Inner page'),
// onPressed: () {
// BoostContainer.of(context)
// .push(
// MaterialPageRoute<void>(
// builder: (BuildContext context) {
// return const Text('Dialog');
// }),
// );
// },
// );
// }),
// );
// },
// );
// },
// );
// }
// return null;
// },
// ),
// ),
// ],
// ),
// ),
// ));
////
//// await tester.tap(find.text('Next'));
//// await tester.pump();
//// await tester.pump(const Duration(milliseconds: 300));
//
// // Both elements are on screen.
// expect(find.text('Next'), findsOneWidget);
//// expect(tester.getTopLeft(find.text('Inner page')).dy, greaterThan(300.0));
////
//// await tester.tap(find.text('Inner page'));
//// await tester.pump();
//// await tester.pump(const Duration(milliseconds: 300));
////
//// // Dialog is pushed to the whole page and is at the top of the screen, not
//// // inside the inner page.
//// expect(tester.getTopLeft(find.text('Dialog')).dy, 0.0);
// });
}