[testing_app] Migrate the sample to the integration_test package (#633)

testing_app/integration_test/app_test.dart

@@ -0,0 +1,92 @@
+// 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:integration_test/integration_test.dart';
+import 'package:testing_app/main.dart';
+
+void main() {
+  group('Testing App Driver Tests', () {
+    IntegrationTestWidgetsFlutterBinding.ensureInitialized();
+
+    testWidgets('Finding an item in the list', (tester) async {
+      await tester.pumpWidget(TestingApp());
+
+      // Create variables for finders that are used multiple times.
+      final itemFinder = find.byKey(ValueKey('text_25'));
+
+      // Scroll until the item to be found appears.
+      await tester.scrollUntilVisible(
+        itemFinder,
+        500.0,
+      );
+
+      // Check if the item contains the correct text.
+      expect(tester.widget<Text>(itemFinder).data, 'Item 25');
+    });
+
+    testWidgets('Testing IconButtons', (tester) async {
+      await tester.pumpWidget(TestingApp());
+
+      // Create a finder for the icon.
+      final iconFinder = find.byKey(ValueKey('icon_0'));
+
+      // Tap on the icon.
+      await tester.tap(iconFinder);
+      await tester.pumpAndSettle(Duration(seconds: 1));
+
+      // Verify if appropriate message appears.
+      expect(find.text('Added to favorites.'), findsOneWidget);
+
+      // Tap on the icon again.
+      await tester.tap(iconFinder);
+      await tester.pumpAndSettle(Duration(seconds: 1));
+
+      // Verify if appropriate message appears.
+      expect(find.text('Removed from favorites.'), findsOneWidget);
+      await tester.pumpAndSettle(Duration(seconds: 1));
+    });
+
+    testWidgets('Verifying whether item gets added to favorites',
+        (tester) async {
+      await tester.pumpWidget(TestingApp());
+
+      // Add item to favorites.
+      await tester.tap(find.byKey(ValueKey('icon_5')));
+      await tester.pumpAndSettle(Duration(seconds: 1));
+
+      // Tap on the favorites button on the AppBar.
+      // The Favorites List should appear.
+      await tester.tap(find.text('Favorites'));
+      await tester.pumpAndSettle();
+
+      // Check if the added item has appeared in the list.
+      expect(tester.widget<Text>(find.byKey(ValueKey('favorites_text_5'))).data,
+          equals('Item 5'));
+    });
+
+    testWidgets('Testing remove button', (tester) async {
+      await tester.pumpWidget(TestingApp());
+
+      // Add item to favorites.
+      await tester.tap(find.byKey(ValueKey('icon_5')));
+      await tester.pumpAndSettle(Duration(seconds: 1));
+
+      // Navigate to Favorites screen.
+      await tester.tap(find.text('Favorites'));
+      await tester.pumpAndSettle();
+
+      // Tap on the remove icon.
+      await tester.tap(find.byKey(ValueKey('remove_icon_5')));
+      await tester.pumpAndSettle();
+
+      // Verify if it disappears.
+      expect(find.text('Item 5'), findsNothing);
+
+      // Verify if appropriate message appears.
+      expect(find.text('Removed from favorites.'), findsOneWidget);
+    });
+  });
+}

testing_app/integration_test/driver.dart

@@ -0,0 +1,23 @@
+// 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:integration_test/integration_test_driver.dart';
+
+Future<void> main() {
+  return integrationDriver(
+    responseDataCallback: (data) async {
+      // If the tests reported any data, save it to the disk.
+      if (data != null) {
+        for (var entry in data.entries) {
+          print('Writing ${entry.key} to the disk.');
+          // Default storage destination is the 'build' directory.
+          await writeResponseData(
+            entry.value as Map<String, dynamic>,
+            testOutputFilename: entry.key,
+          );
+        }
+      }
+    },
+  );
+}

testing_app/integration_test/perf_test.dart

@@ -0,0 +1,119 @@
+// 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:integration_test/integration_test.dart';
+import 'package:testing_app/main.dart';
+
+void main() {
+  group('Testing App Performance Tests', () {
+    final binding = IntegrationTestWidgetsFlutterBinding.ensureInitialized()
+        as IntegrationTestWidgetsFlutterBinding;
+
+    // The fullyLive frame policy simulates
+    // the way Flutter responds to animations.
+    binding.framePolicy = LiveTestWidgetsFlutterBindingFramePolicy.fullyLive;
+
+    testWidgets('Scrolling test', (tester) async {
+      await tester.pumpWidget(TestingApp());
+
+      // Create variables for finders that are used multiple times.
+      final listFinder = find.byType(ListView);
+      final scroller = tester.widget<ListView>(listFinder).controller;
+
+      // Record the performance timeline of the following operations.
+      await binding.traceAction(
+        () async {
+          // Record the performance summary as the app scrolls through
+          // the list of items.
+          await binding.watchPerformance(
+            () async {
+              // Quickly scroll all the way down.
+              await scroller.animateTo(
+                7000,
+                duration: const Duration(seconds: 1),
+                curve: Curves.linear,
+              );
+              await tester.pumpAndSettle();
+
+              // Quickly scroll back up all the way.
+              await scroller.animateTo(
+                -7000,
+                duration: const Duration(seconds: 1),
+                curve: Curves.linear,
+              );
+              await tester.pumpAndSettle();
+            },
+            // Send the performance summary to the driver.
+            reportKey: 'scrolling_summary',
+          );
+        },
+        // Send the timeline data to the driver.
+        // This timeline can be opened in the Chrome browser's tracing tools
+        // by navigating to chrome://tracing.
+        reportKey: 'scrolling_timeline',
+      );
+    });
+
+    testWidgets('Favorites operations test', (tester) async {
+      await tester.pumpWidget(TestingApp());
+
+      // Record the performance timeline of the following operations.
+      await binding.traceAction(
+        () async {
+          // Record the performance summary as operations are performed
+          // on the favorites list.
+          await binding.watchPerformance(
+            () async {
+              // Create a list of icon keys.
+              final iconKeys = [
+                'icon_0',
+                'icon_1',
+                'icon_2',
+              ];
+
+              // Add first three items to favorites.
+              for (var icon in iconKeys) {
+                // Tap onto the icon.
+                await tester.tap(find.byKey(ValueKey(icon)));
+                await tester.pumpAndSettle();
+
+                // Verify if appropriate message appears.
+                expect(find.text('Added to favorites.'), findsOneWidget);
+              }
+
+              // Tap onto the favorites button on the AppBar.
+              // The Favorites List should appear.
+              await tester.tap(find.text('Favorites'));
+              await tester.pumpAndSettle();
+
+              final removeIconKeys = [
+                'remove_icon_0',
+                'remove_icon_1',
+                'remove_icon_2',
+              ];
+
+              // Remove all the items from favorites.
+              for (final iconKey in removeIconKeys) {
+                // Tap onto the remove icon.
+                await tester.tap(find.byKey(ValueKey(iconKey)));
+                await tester.pumpAndSettle();
+
+                // Verify if appropriate message appears.
+                expect(find.text('Removed from favorites.'), findsOneWidget);
+              }
+            },
+            // Send the performance summary to the driver.
+            reportKey: 'favorites_operations_summary',
+          );
+        },
+        // Send the timeline data to the driver.
+        // This timeline can be opened in the Chrome browser's tracing tools
+        // by navigating to chrome://tracing.
+        reportKey: 'favorites_operations_timeline',
+      );
+    });
+  });
+}

testing_app/integration_test/state_mgmt_test.dart

@@ -0,0 +1,50 @@
+// 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:integration_test/integration_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 main() {
+  group('Testing App State Management Tests', () {
+    IntegrationTestWidgetsFlutterBinding.ensureInitialized();
+
+    testWidgets('Verifying add method', (tester) async {
+      await tester.pumpWidget(createFavoritesScreen());
+
+      //  Add an item to the list.
+      favoritesList.add(30);
+      await tester.pumpAndSettle();
+
+      // Check if the new item appears in the list.
+      expect(find.text('Item 30'), findsOneWidget);
+    });
+
+    testWidgets('Verifying remove method', (tester) async {
+      await tester.pumpWidget(createFavoritesScreen());
+
+      // Remove an item from the list.
+      favoritesList.remove(30);
+      await tester.pumpAndSettle();
+
+      // Verify if it disappears.
+      expect(find.text('Item 30'), findsNothing);
+    });
+  });
+}