109 lines
3.4 KiB
Dart
109 lines
3.4 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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class MyNotification extends Notification {}
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void main() {
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testWidgets('Notification basics - toString', (WidgetTester tester) async {
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expect(MyNotification(), hasOneLineDescription);
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});
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testWidgets('Notification basics - dispatch', (WidgetTester tester) async {
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final log = <dynamic>[];
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final GlobalKey key = GlobalKey();
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await tester.pumpWidget(
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NotificationListener<MyNotification>(
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onNotification: (MyNotification value) {
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log.add('a');
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log.add(value);
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return true;
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},
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child: NotificationListener<MyNotification>(
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onNotification: (MyNotification value) {
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log.add('b');
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log.add(value);
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return false;
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},
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child: Container(key: key),
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),
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),
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);
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expect(log, isEmpty);
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final Notification notification = MyNotification();
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expect(() {
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notification.dispatch(key.currentContext);
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}, isNot(throwsException));
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expect(log, <dynamic>['b', notification, 'a', notification]);
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});
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testWidgets('Notification basics - cancel', (WidgetTester tester) async {
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final log = <dynamic>[];
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final GlobalKey key = GlobalKey();
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await tester.pumpWidget(
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NotificationListener<MyNotification>(
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onNotification: (MyNotification value) {
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log.add('a - error');
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log.add(value);
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return true;
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},
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child: NotificationListener<MyNotification>(
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onNotification: (MyNotification value) {
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log.add('b');
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log.add(value);
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return true;
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},
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child: Container(key: key),
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),
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),
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);
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expect(log, isEmpty);
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final Notification notification = MyNotification();
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expect(() {
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notification.dispatch(key.currentContext);
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}, isNot(throwsException));
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expect(log, <dynamic>['b', notification]);
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});
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testWidgets('Notification basics - listener null return value', (WidgetTester tester) async {
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final log = <Type>[];
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final GlobalKey key = GlobalKey();
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await tester.pumpWidget(
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NotificationListener<MyNotification>(
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onNotification: (MyNotification value) {
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log.add(value.runtimeType);
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return false;
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},
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child: NotificationListener<MyNotification>(
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onNotification: (MyNotification value) => false,
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child: Container(key: key),
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),
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),
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);
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expect(() {
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MyNotification().dispatch(key.currentContext);
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}, isNot(throwsException));
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expect(log, <Type>[MyNotification]);
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});
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testWidgets('Notification basics - listener null return value', (WidgetTester tester) async {
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await tester.pumpWidget(const Placeholder());
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final n1 = ScrollMetricsNotification(
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metrics: FixedScrollMetrics(
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minScrollExtent: 1.0,
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maxScrollExtent: 2.0,
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pixels: 3.0,
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viewportDimension: 4.0,
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axisDirection: AxisDirection.down,
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devicePixelRatio: 5.0,
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),
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context: tester.allElements.first,
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);
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expect(n1.metrics.pixels, 3.0);
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final ScrollUpdateNotification n2 = n1.asScrollUpdate();
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expect(n2.metrics.pixels, 3.0);
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});
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}
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