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// Copyright 2013 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/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:go_router/go_router.dart';
void main() {
testWidgets('CustomTransitionPage builds its child using transitionsBuilder',
(WidgetTester tester) async {
const HomeScreen child = HomeScreen();
final CustomTransitionPage<void> transition = CustomTransitionPage<void>(
transitionsBuilder: expectAsync4((_, __, ___, Widget child) => child),
child: child,
);
final GoRouter router = GoRouter(
routes: <GoRoute>[
GoRoute(
path: '/',
pageBuilder: (_, __) => transition,
),
],
);
await tester.pumpWidget(
MaterialApp.router(
routeInformationParser: router.routeInformationParser,
routerDelegate: router.routerDelegate,
title: 'GoRouter Example',
),
);
expect(find.byWidget(child), findsOneWidget);
});
testWidgets('NoTransitionPage does not apply any transition',
(WidgetTester tester) async {
final ValueNotifier<bool> showHomeValueNotifier =
ValueNotifier<bool>(false);
await tester.pumpWidget(
MaterialApp(
home: ValueListenableBuilder<bool>(
valueListenable: showHomeValueNotifier,
builder: (_, bool showHome, __) {
return Navigator(
pages: <Page<void>>[
const NoTransitionPage<void>(
child: LoginScreen(),
),
if (showHome)
const NoTransitionPage<void>(
child: HomeScreen(),
),
],
onPopPage: (Route<dynamic> route, dynamic result) {
return route.didPop(result);
},
);
},
),
),
);
final Finder homeScreenFinder = find.byType(HomeScreen);
showHomeValueNotifier.value = true;
await tester.pump();
final Offset homeScreenPositionInTheMiddleOfAddition =
tester.getTopLeft(homeScreenFinder);
await tester.pumpAndSettle();
final Offset homeScreenPositionAfterAddition =
tester.getTopLeft(homeScreenFinder);
showHomeValueNotifier.value = false;
await tester.pump();
final Offset homeScreenPositionInTheMiddleOfRemoval =
tester.getTopLeft(homeScreenFinder);
await tester.pumpAndSettle();
expect(
homeScreenPositionInTheMiddleOfAddition,
homeScreenPositionAfterAddition,
);
expect(
homeScreenPositionAfterAddition,
homeScreenPositionInTheMiddleOfRemoval,
);
});
}
class HomeScreen extends StatelessWidget {
const HomeScreen({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return const Scaffold(
body: Center(
child: Text('HomeScreen'),
),
);
}
}
class LoginScreen extends StatelessWidget {
const LoginScreen({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return const Scaffold(
body: Center(
child: Text('LoginScreen'),
),
);
}
}