mirror of
https://github.com/flutter/flutter
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46 lines
1.6 KiB
Dart
46 lines
1.6 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:async';
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import 'dart:convert';
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import 'dart:io';
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import 'package:flutter_driver/flutter_driver.dart';
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import 'package:path/path.dart' as p;
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import 'package:test/test.dart' hide TypeMatcher, isInstanceOf;
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void main() {
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group('semantics performance test', () {
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FlutterDriver driver;
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setUpAll(() async {
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driver = await FlutterDriver.connect(printCommunication: true);
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});
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tearDownAll(() async {
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if (driver != null)
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driver.close();
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});
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test('inital tree creation', () async {
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// Let app become fully idle.
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await Future<void>.delayed(const Duration(seconds: 2));
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await driver.forceGC();
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final Timeline timeline = await driver.traceAction(() async {
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expect(await driver.setSemantics(true), isTrue);
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});
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final Iterable<TimelineEvent> semanticsEvents = timeline.events.where((TimelineEvent event) => event.name == 'Semantics');
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if (semanticsEvents.length != 2)
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fail('Expected exactly two semantics events, got ${semanticsEvents.length}');
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final Duration semanticsTreeCreation = Duration(microseconds: semanticsEvents.last.timestampMicros - semanticsEvents.first.timestampMicros);
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final String jsonEncoded = json.encode(<String, dynamic>{'initialSemanticsTreeCreation': semanticsTreeCreation.inMilliseconds});
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File(p.join(testOutputsDirectory, 'complex_layout_semantics_perf.json')).writeAsStringSync(jsonEncoded);
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});
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});
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}
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