1// Copyright 2016 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5import 'dart:async'; 6 7import 'package:flutter_test/flutter_test.dart'; 8import 'package:flutter/material.dart'; 9import 'package:flutter/rendering.dart'; 10import 'package:stocks/main.dart' as stocks; 11import 'package:stocks/stock_data.dart' as stock_data; 12 13import '../common.dart'; 14 15const Duration kBenchmarkTime = Duration(seconds: 15); 16 17Future<void> main() async { 18 assert(false, "Don't run benchmarks in checked mode! Use 'flutter run --release'."); 19 stock_data.StockData.actuallyFetchData = false; 20 21 // We control the framePolicy below to prevent us from scheduling frames in 22 // the engine, so that the engine does not interfere with our timings. 23 final LiveTestWidgetsFlutterBinding binding = TestWidgetsFlutterBinding.ensureInitialized(); 24 25 final Stopwatch watch = Stopwatch(); 26 int iterations = 0; 27 28 await benchmarkWidgets((WidgetTester tester) async { 29 stocks.main(); 30 await tester.pump(); // Start startup animation 31 await tester.pump(const Duration(seconds: 1)); // Complete startup animation 32 await tester.tapAt(const Offset(20.0, 40.0)); // Open drawer 33 await tester.pump(); // Start drawer animation 34 await tester.pump(const Duration(seconds: 1)); // Complete drawer animation 35 36 final TestViewConfiguration big = TestViewConfiguration( 37 size: const Size(360.0, 640.0), 38 window: RendererBinding.instance.window, 39 ); 40 final TestViewConfiguration small = TestViewConfiguration( 41 size: const Size(355.0, 635.0), 42 window: RendererBinding.instance.window, 43 ); 44 final RenderView renderView = WidgetsBinding.instance.renderView; 45 binding.framePolicy = LiveTestWidgetsFlutterBindingFramePolicy.benchmark; 46 47 watch.start(); 48 while (watch.elapsed < kBenchmarkTime) { 49 renderView.configuration = (iterations % 2 == 0) ? big : small; 50 await tester.pumpBenchmark(Duration(milliseconds: iterations * 16)); 51 iterations += 1; 52 } 53 watch.stop(); 54 }); 55 56 final BenchmarkResultPrinter printer = BenchmarkResultPrinter(); 57 printer.addResult( 58 description: 'Stock layout', 59 value: watch.elapsedMicroseconds / iterations, 60 unit: 'µs per iteration', 61 name: 'stock_layout_iteration', 62 ); 63 printer.printToStdout(); 64} 65