| // 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. |
| |
| // Logically this file should be part of `gesture_binding_test.dart` but is here |
| // due to conflict of `flutter_test` and `package:test`. |
| // See https://github.com/dart-lang/matcher/issues/98 |
| // TODO(CareF): Consider combine this file back to `gesture_binding_test.dart` |
| // after #98 is fixed. |
| |
| import 'dart:ui' as ui; |
| |
| import 'package:flutter/gestures.dart'; |
| import 'package:flutter/widgets.dart'; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| void main() { |
| final TestWidgetsFlutterBinding binding = AutomatedTestWidgetsFlutterBinding(); |
| testWidgets('PointerEvent resampling on a widget', (WidgetTester tester) async { |
| assert(WidgetsBinding.instance == binding); |
| Duration currentTestFrameTime() => Duration(milliseconds: binding.clock.now().millisecondsSinceEpoch); |
| final Duration epoch = currentTestFrameTime(); |
| final ui.PointerDataPacket packet = ui.PointerDataPacket( |
| data: <ui.PointerData>[ |
| ui.PointerData( |
| change: ui.PointerChange.add, |
| physicalX: 0.0, |
| timeStamp: epoch + const Duration(milliseconds: 0), |
| ), |
| ui.PointerData( |
| change: ui.PointerChange.down, |
| physicalX: 0.0, |
| timeStamp: epoch + const Duration(milliseconds: 1), |
| ), |
| ui.PointerData( |
| change: ui.PointerChange.move, |
| physicalX: 10.0, |
| timeStamp: epoch + const Duration(milliseconds: 2), |
| ), |
| ui.PointerData( |
| change: ui.PointerChange.move, |
| physicalX: 20.0, |
| timeStamp: epoch + const Duration(milliseconds: 3), |
| ), |
| ui.PointerData( |
| change: ui.PointerChange.move, |
| physicalX: 30.0, |
| timeStamp: epoch + const Duration(milliseconds: 4), |
| ), |
| ui.PointerData( |
| change: ui.PointerChange.up, |
| physicalX: 40.0, |
| timeStamp: epoch + const Duration(milliseconds: 5), |
| ), |
| ui.PointerData( |
| change: ui.PointerChange.remove, |
| physicalX: 40.0, |
| timeStamp: epoch + const Duration(milliseconds: 6), |
| ), |
| ], |
| ); |
| |
| final List<PointerEvent> events = <PointerEvent>[]; |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Listener( |
| onPointerDown: (PointerDownEvent event) => events.add(event), |
| onPointerMove: (PointerMoveEvent event) => events.add(event), |
| onPointerUp: (PointerUpEvent event) => events.add(event), |
| child: const Text('test'), |
| ), |
| ), |
| ); |
| |
| GestureBinding.instance!.resamplingEnabled = true; |
| const Duration kSamplingOffset = Duration(microseconds: -5500); |
| GestureBinding.instance!.samplingOffset = kSamplingOffset; |
| ui.window.onPointerDataPacket!(packet); |
| expect(events.length, 0); |
| |
| await tester.pump(const Duration(milliseconds: 7)); |
| expect(events.length, 1); |
| expect(events[0], isA<PointerDownEvent>()); |
| expect(events[0].timeStamp, currentTestFrameTime() + kSamplingOffset); |
| expect(events[0].position, Offset(5.0 / ui.window.devicePixelRatio, 0.0)); |
| |
| // Now the system time is epoch + 9ms |
| await tester.pump(const Duration(milliseconds: 2)); |
| expect(events.length, 2); |
| expect(events[1].timeStamp, currentTestFrameTime() + kSamplingOffset); |
| expect(events[1], isA<PointerMoveEvent>()); |
| expect(events[1].position, Offset(25.0 / ui.window.devicePixelRatio, 0.0)); |
| expect(events[1].delta, Offset(20.0 / ui.window.devicePixelRatio, 0.0)); |
| |
| // Now the system time is epoch + 11ms |
| await tester.pump(const Duration(milliseconds: 2)); |
| expect(events.length, 4); |
| expect(events[2].timeStamp, currentTestFrameTime() + kSamplingOffset); |
| expect(events[2], isA<PointerMoveEvent>()); |
| expect(events[2].position, Offset(40.0 / ui.window.devicePixelRatio, 0.0)); |
| expect(events[2].delta, Offset(15.0 / ui.window.devicePixelRatio, 0.0)); |
| expect(events[3].timeStamp, currentTestFrameTime() + kSamplingOffset); |
| expect(events[3], isA<PointerUpEvent>()); |
| expect(events[3].position, Offset(40.0 / ui.window.devicePixelRatio, 0.0)); |
| }); |
| } |