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