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// 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 'dart:async';
import 'package:complex_layout/main.dart';
import 'package:flutter/material.dart';
import 'package:flutter/scheduler.dart';
import 'package:flutter_test/flutter_test.dart';
/// The speed, in pixels per second, that the drag gestures should end with.
const double speed = 1500.0;
/// The number of down drags and the number of up drags. The total number of
/// gestures is twice this number.
const int maxIterations = 4;
/// The time that is allowed between gestures for the fling effect to settle.
const Duration pauses = Duration(milliseconds: 500);
Future<void> main() async {
final Completer<void> ready = Completer<void>();
runApp(GestureDetector(
onTap: () {
debugPrint('Received tap.');
ready.complete();
},
behavior: HitTestBehavior.opaque,
child: IgnorePointer(
ignoring: true,
child: ComplexLayoutApp(),
),
));
await SchedulerBinding.instance.endOfFrame;
/// Wait 50ms to allow the GPU thread to actually put up the frame. (The
/// endOfFrame future ends when we send the data to the engine, before the GPU
/// thread has had a chance to rasterize, etc.)
await Future<void>.delayed(const Duration(milliseconds: 50));
debugPrint('==== MEMORY BENCHMARK ==== READY ====');
await ready.future; // waits for tap sent by devicelab task
debugPrint('Continuing...');
// remove onTap handler, enable pointer events for app
runApp(GestureDetector(
child: IgnorePointer(
ignoring: false,
child: ComplexLayoutApp(),
),
));
await SchedulerBinding.instance.endOfFrame;
final WidgetController controller = LiveWidgetController(WidgetsBinding.instance);
// Scroll down
for (int iteration = 0; iteration < maxIterations; iteration += 1) {
debugPrint('Scroll down... $iteration/$maxIterations');
await controller.fling(find.byType(ListView), const Offset(0.0, -700.0), speed);
await Future<void>.delayed(pauses);
}
// Scroll up
for (int iteration = 0; iteration < maxIterations; iteration += 1) {
debugPrint('Scroll up... $iteration/$maxIterations');
await controller.fling(find.byType(ListView), const Offset(0.0, 300.0), speed);
await Future<void>.delayed(pauses);
}
debugPrint('==== MEMORY BENCHMARK ==== DONE ====');
}