blob: 95b80ef8a58da97cb5cce681b4934524732ad408 [file] [log] [blame]
// 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 'package:flutter/foundation.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:integration_test/integration_test.dart';
import 'package:macrobenchmarks/src/simple_scroll.dart';
void main() {
final IntegrationTestWidgetsFlutterBinding binding = IntegrationTestWidgetsFlutterBinding.ensureInitialized();
testWidgets(
'Frame Counter and Input Delay for benchmarkLive',
(WidgetTester tester) async {
await tester.pumpWidget(const MaterialApp(home: Scaffold(body: SimpleScroll())));
await tester.pumpAndSettle();
final Offset location = tester.getCenter(find.byType(ListView));
int frameCount = 0;
void frameCounter(Duration elapsed) {
frameCount += 1;
}
tester.binding.addPersistentFrameCallback(frameCounter);
const int timeInSecond = 1;
const Duration totalTime = Duration(seconds: timeInSecond);
const int moveEventNumber = timeInSecond * 120; // 120Hz
const Offset movePerRun = Offset(0.0, -200.0 / moveEventNumber);
final List<PointerEventRecord> records = <PointerEventRecord>[
PointerEventRecord(Duration.zero, <PointerEvent>[
PointerAddedEvent(
position: location,
),
PointerDownEvent(
position: location,
pointer: 1,
),
]),
...<PointerEventRecord>[
for (int t=0; t < moveEventNumber; t++)
PointerEventRecord(totalTime * (t / moveEventNumber), <PointerEvent>[
PointerMoveEvent(
timeStamp: totalTime * (t / moveEventNumber),
position: location + movePerRun * t.toDouble(),
pointer: 1,
delta: movePerRun,
),
]),
],
PointerEventRecord(totalTime, <PointerEvent>[
PointerUpEvent(
// Deviate a little from integer number of frames to reduce flakiness
timeStamp: totalTime - const Duration(milliseconds: 1),
position: location + movePerRun * moveEventNumber.toDouble(),
pointer: 1,
),
]),
];
binding.framePolicy = LiveTestWidgetsFlutterBindingFramePolicy.benchmarkLive;
List<Duration> delays = await tester.handlePointerEventRecord(records);
await tester.pumpAndSettle();
binding.reportData = <String, dynamic>{
'benchmarkLive': _summarizeResult(frameCount, delays),
};
await tester.idle();
await tester.binding.delayed(const Duration(milliseconds: 250));
binding.framePolicy = LiveTestWidgetsFlutterBindingFramePolicy.fullyLive;
frameCount = 0;
delays = await tester.handlePointerEventRecord(records);
await tester.pumpAndSettle();
binding.reportData!['fullyLive'] = _summarizeResult(frameCount, delays);
await tester.idle();
},
);
}
Map<String, dynamic> _summarizeResult(
final int frameCount,
final List<Duration> delays,
) {
assert(delays.length > 1);
final List<int> delayedInMicro = delays.map<int>(
(Duration delay) => delay.inMicroseconds,
).toList();
final List<int> delayedInMicroSorted = List<int>.from(delayedInMicro)..sort();
final int index90th = (delayedInMicroSorted.length * 0.90).round();
final int percentile90th = delayedInMicroSorted[index90th];
final int sum = delayedInMicroSorted.reduce((int a, int b) => a + b);
final double averageDelay = sum.toDouble() / delayedInMicroSorted.length;
return <String, dynamic>{
'frame_count': frameCount,
'average_delay_millis': averageDelay / 1E3,
'90th_percentile_delay_millis': percentile90th / 1E3,
if (kDebugMode)
'delaysInMicro': delayedInMicro,
};
}