snapshot of https://github.com/flutter/samples.git (main, 2026-09-16; blobs > 131072B omitted)

testing_app/integration_test/app_test.dart

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+// 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(const TestingApp());
+
+      // Create variables for finders that are used multiple times.
+      final itemFinder = find.byKey(const 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(const TestingApp());
+
+      // Create a finder for the icon.
+      final iconFinder = find.byKey(const ValueKey('icon_0'));
+
+      // Tap on the icon.
+      await tester.tap(iconFinder);
+
+      // Wait 1 second for the SnackBar to be displayed
+      await tester.pumpAndSettle(const Duration(seconds: 1));
+
+      // Verify if appropriate message appears.
+      expect(find.text('Added to favorites.'), findsOneWidget);
+
+      // Tap on the icon again.
+      await tester.tap(iconFinder);
+
+      // Wait 1 second for the SnackBar to be displayed
+      await tester.pumpAndSettle(const Duration(seconds: 1));
+
+      // Verify if appropriate message appears.
+      expect(find.text('Removed from favorites.'), findsOneWidget);
+    });
+
+    testWidgets('Verifying whether item gets added to favorites', (
+      tester,
+    ) async {
+      await tester.pumpWidget(const TestingApp());
+
+      // Add item to favorites.
+      await tester.tap(find.byKey(const ValueKey('icon_5')));
+      await tester.pumpAndSettle();
+
+      // 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(const ValueKey('favorites_text_5')))
+            .data,
+        equals('Item 5'),
+      );
+    });
+
+    testWidgets('Testing remove button', (tester) async {
+      await tester.pumpWidget(const TestingApp());
+
+      // Add item to favorites.
+      await tester.tap(find.byKey(const ValueKey('icon_5')));
+      await tester.pumpAndSettle();
+
+      // Navigate to Favorites screen.
+      await tester.tap(find.text('Favorites'));
+      await tester.pumpAndSettle();
+
+      // Tap on the remove icon.
+      await tester.tap(find.byKey(const ValueKey('remove_icon_5')));
+
+      // Wait 1 second for the SnackBar to be displayed
+      await tester.pumpAndSettle(const Duration(seconds: 1));
+
+      // 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

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+// 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() => integrationDriver();

testing_app/integration_test/perf_driver.dart

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+// Copyright 2021 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 'dart:developer';
+
+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) {
+          log('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

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+// 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();
+
+    // The fullyLive frame policy simulates
+    // the way Flutter responds to animations.
+    binding.framePolicy = LiveTestWidgetsFlutterBindingFramePolicy.fullyLive;
+
+    testWidgets('Scrolling test', (tester) async {
+      await tester.pumpWidget(const 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 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',
+      );
+    });
+
+    testWidgets('Favorites operations test', (tester) async {
+      await tester.pumpWidget(const TestingApp());
+
+      // 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(const Duration(seconds: 1));
+
+            // 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(const Duration(seconds: 1));
+
+            // Verify if appropriate message appears.
+            expect(find.text('Removed from favorites.'), findsOneWidget);
+          }
+        },
+        // Send the performance summary to the driver.
+        reportKey: 'favorites_operations_summary',
+      );
+    });
+  });
+}

testing_app/integration_test/state_mgmt_test.dart

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+// 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';
+
+late Favorites favoritesList;
+
+Widget createFavoritesScreen() => ChangeNotifierProvider<Favorites>(
+  create: (context) {
+    favoritesList = Favorites();
+    return favoritesList;
+  },
+  child: const 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);
+    });
+  });
+}