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samples/testing_app/test/favorites_test.dart

71 lines
2.0 KiB

// Copyright 2020 The Flutter team. 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:provider/provider.dart';
import 'package:testing_app/models/favorites.dart';
import 'package:testing_app/screens/favorites.dart';
Favorites favoritesList;
Widget createFavoritesScreen() => ChangeNotifierProvider<Favorites>(
create: (context) {
favoritesList = Favorites();
return favoritesList;
},
child: MaterialApp(
home: FavoritesPage(),
),
);
void addItems() {
for (var i = 0; i < 5; i++) {
favoritesList.add(i);
}
}
void main() {
group('Favorites Page Widget Tests', () {
testWidgets('Test if Placeholder shows in case of empty list',
(tester) async {
await tester.pumpWidget(createFavoritesScreen());
// Verify if the placeholder text shows up.
expect(find.text('No favorites added.'), findsOneWidget);
});
testWidgets('Test if ListView shows up', (tester) async {
await tester.pumpWidget(createFavoritesScreen());
addItems();
await tester.pumpAndSettle();
// Verify if ListView shows up.
expect(find.byType(ListView), findsOneWidget);
});
testWidgets('Testing Remove Button', (tester) async {
await tester.pumpWidget(createFavoritesScreen());
addItems();
await tester.pumpAndSettle();
// Get the total number of items available.
var totalItems = tester.widgetList(find.byIcon(Icons.close)).length;
// Remove one item.
await tester.tap(find.byIcon(Icons.close).first);
await tester.pumpAndSettle();
// Check if removed properly.
expect(tester.widgetList(find.byIcon(Icons.close)).length,
lessThan(totalItems));
// Verify if the appropriate message is shown.
expect(find.text('Removed from favorites.'), findsOneWidget);
});
});
}