// Copyright 2014 The Flutter Authors. 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:async'; import 'package:flutter_driver/flutter_driver.dart'; import 'package:test/test.dart' hide TypeMatcher, isInstanceOf; void main() { group('scrolling performance test', () { late FlutterDriver driver; setUpAll(() async { driver = await FlutterDriver.connect(); }); tearDownAll(() async { driver.close(); }); test('measure', () async { final Timeline timeline = await driver.traceAction(() async { // Find the scrollable stock list final SerializableFinder stockList = find.byValueKey('stock-list'); expect(stockList, isNotNull); // Scroll down for (int i = 0; i < 5; i++) { await driver.scroll(stockList, 0.0, -300.0, const Duration(milliseconds: 300)); await Future<void>.delayed(const Duration(milliseconds: 500)); } // Scroll up for (int i = 0; i < 5; i++) { await driver.scroll(stockList, 0.0, 300.0, const Duration(milliseconds: 300)); await Future<void>.delayed(const Duration(milliseconds: 500)); } }); final TimelineSummary summary = TimelineSummary.summarize(timeline); await summary.writeTimelineToFile('stocks_scroll_perf', pretty: true); }, timeout: Timeout.none); }); }