import 'dart:io'; import 'package:flutter_test/flutter_test.dart'; import 'package:flutter/material.dart'; import 'package:flutter/rendering.dart'; import 'package:stocks/main.dart' as stocks; import 'package:stocks/stock_data.dart' as stock_data; const int _kNumberOfIterations = 100000; const bool _kRunForever = false; void _doNothing() { } void main() { stock_data.StockDataFetcher.actuallyFetchData = false; stocks.StocksAppState appState; benchmarkWidgets((WidgetTester tester) { stocks.main(); tester.pump(); // Start startup animation tester.pump(const Duration(seconds: 1)); // Complete startup animation tester.tapAt(new Point(20.0, 20.0)); // Open drawer tester.pump(); // Start drawer animation tester.pump(const Duration(seconds: 1)); // Complete drawer animation appState = tester.state(find.byType(stocks.StocksApp)); }); BuildOwner buildOwner = WidgetsBinding.instance.buildOwner; Stopwatch watch = new Stopwatch() ..start(); for (int i = 0; i < _kNumberOfIterations || _kRunForever; ++i) { appState.setState(_doNothing); buildOwner.buildDirtyElements(); } watch.stop(); print("Stock build: " + watch.elapsed.toString()); exit(0); }