| // Copyright 2017 The Chromium 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 'dart:convert'; |
| import 'dart:io'; |
| |
| import 'package:flutter_driver/flutter_driver.dart'; |
| import 'package:path/path.dart' as p; |
| import 'package:test/test.dart'; |
| |
| void main() { |
| group('semantics performance test', () { |
| FlutterDriver driver; |
| |
| setUpAll(() async { |
| driver = await FlutterDriver.connect(printCommunication: true); |
| }); |
| |
| tearDownAll(() async { |
| if (driver != null) |
| driver.close(); |
| }); |
| |
| test('inital tree creation', () async { |
| // Let app become fully idle. |
| await new Future<Null>.delayed(const Duration(seconds: 1)); |
| |
| final Timeline timeline = await driver.traceAction(() async { |
| expect(await driver.setSemantics(true), isTrue); |
| }); |
| |
| final Iterable<TimelineEvent> semanticsEvents = timeline.events.where((TimelineEvent event) => event.name == "Semantics"); |
| if (semanticsEvents.length != 1) |
| fail('Expected exactly one semantics event, got ${semanticsEvents.length}'); |
| final Duration semanticsTreeCreation = semanticsEvents.first.duration; |
| |
| final String json = JSON.encode(<String, dynamic>{'initialSemanticsTreeCreation': semanticsTreeCreation.inMilliseconds}); |
| new File(p.join(testOutputsDirectory, 'complex_layout_semantics_perf.json')).writeAsStringSync(json); |
| }); |
| }); |
| } |