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

testing_app/integration_test/perf_test.dart

@@ -0,0 +1,96 @@
+// 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',
+      );
+    });
+  });
+}