// Copyright 2015 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'; void main() { testWidgets('TickerMode', (WidgetTester tester) async { const Widget widget = TickerMode( enabled: false, child: CircularProgressIndicator() ); expect(widget.toString, isNot(throwsException)); await tester.pumpWidget(widget); expect(tester.binding.transientCallbackCount, 0); await tester.pumpWidget(const TickerMode( enabled: true, child: CircularProgressIndicator() )); expect(tester.binding.transientCallbackCount, 1); await tester.pumpWidget(const TickerMode( enabled: false, child: CircularProgressIndicator() )); expect(tester.binding.transientCallbackCount, 0); }); testWidgets('Navigation with TickerMode', (WidgetTester tester) async { await tester.pumpWidget(MaterialApp( home: const LinearProgressIndicator(), routes: <String, WidgetBuilder>{ '/test': (BuildContext context) => const Text('hello'), }, )); expect(tester.binding.transientCallbackCount, 1); tester.state<NavigatorState>(find.byType(Navigator)).pushNamed('/test'); expect(tester.binding.transientCallbackCount, 2); await tester.pump(); expect(tester.binding.transientCallbackCount, 2); await tester.pump(const Duration(seconds: 5)); expect(tester.binding.transientCallbackCount, 0); tester.state<NavigatorState>(find.byType(Navigator)).pop(); expect(tester.binding.transientCallbackCount, 1); await tester.pump(); expect(tester.binding.transientCallbackCount, 2); await tester.pump(const Duration(seconds: 5)); expect(tester.binding.transientCallbackCount, 1); }); testWidgets('SingleTickerProviderStateMixin can handle not being used', (WidgetTester tester) async { final Widget widget = BoringTickerTest(); expect(widget.toString, isNot(throwsException)); await tester.pumpWidget(widget); await tester.pumpWidget(Container()); // the test is that this doesn't crash, like it used to... }); } class BoringTickerTest extends StatefulWidget { @override _BoringTickerTestState createState() => _BoringTickerTestState(); } class _BoringTickerTestState extends State<BoringTickerTest> with SingleTickerProviderStateMixin { @override Widget build(BuildContext context) => Container(); }