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// 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';
class MyNotification extends Notification { }
void main() {
testWidgets('Notification basics - toString', (WidgetTester tester) async {
expect(MyNotification(), hasOneLineDescription);
});
testWidgets('Notification basics - dispatch', (WidgetTester tester) async {
final List<dynamic> log = <dynamic>[];
final GlobalKey key = GlobalKey();
await tester.pumpWidget(NotificationListener<MyNotification>(
onNotification: (MyNotification value) {
log.add('a');
log.add(value);
return true;
},
child: NotificationListener<MyNotification>(
onNotification: (MyNotification value) {
log.add('b');
log.add(value);
return false;
},
child: Container(key: key),
),
));
expect(log, isEmpty);
final Notification notification = MyNotification();
expect(() { notification.dispatch(key.currentContext); }, isNot(throwsException));
expect(log, <dynamic>['b', notification, 'a', notification]);
});
testWidgets('Notification basics - cancel', (WidgetTester tester) async {
final List<dynamic> log = <dynamic>[];
final GlobalKey key = GlobalKey();
await tester.pumpWidget(NotificationListener<MyNotification>(
onNotification: (MyNotification value) {
log.add('a - error');
log.add(value);
return true;
},
child: NotificationListener<MyNotification>(
onNotification: (MyNotification value) {
log.add('b');
log.add(value);
return true;
},
child: Container(key: key),
),
));
expect(log, isEmpty);
final Notification notification = MyNotification();
expect(() { notification.dispatch(key.currentContext); }, isNot(throwsException));
expect(log, <dynamic>['b', notification]);
});
testWidgets('Notification basics - listener null return value', (WidgetTester tester) async {
final List<Type> log = <Type>[];
final GlobalKey key = GlobalKey();
await tester.pumpWidget(NotificationListener<MyNotification>(
onNotification: (MyNotification value) {
log.add(value.runtimeType);
return false;
},
child: NotificationListener<MyNotification>(
onNotification: (MyNotification value) => false,
child: Container(key: key),
),
));
expect(() { MyNotification().dispatch(key.currentContext); }, isNot(throwsException));
expect(log, <Type>[MyNotification]);
});
}