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