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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:ui' show VoidCallback;
import 'package:flutter/gestures.dart';
import 'package:flutter_test/flutter_test.dart';
import 'gesture_tester.dart';
// Down/move/up pair 1: normal tap sequence
const PointerDownEvent down = PointerDownEvent(
pointer: 5,
position: Offset(10, 10),
);
const PointerMoveEvent move = PointerMoveEvent(
pointer: 5,
position: Offset(15, 15),
);
const PointerUpEvent up = PointerUpEvent(
pointer: 5,
position: Offset(15, 15),
);
// Down/move/up pair 2: tap sequence with a large move in the middle
const PointerDownEvent down2 = PointerDownEvent(
pointer: 6,
position: Offset(10, 10),
);
const PointerMoveEvent move2 = PointerMoveEvent(
pointer: 6,
position: Offset(100, 200),
);
const PointerUpEvent up2 = PointerUpEvent(
pointer: 6,
position: Offset(100, 200),
);
void main() {
setUp(ensureGestureBinding);
test('GestureRecognizer smoketest', () {
final TestGestureRecognizer recognizer = TestGestureRecognizer(debugOwner: 0);
expect(recognizer, hasAGoodToStringDeep);
});
test('OffsetPair', () {
const OffsetPair offset1 = OffsetPair(
local: Offset(10, 20),
global: Offset(30, 40),
);
expect(offset1.local, const Offset(10, 20));
expect(offset1.global, const Offset(30, 40));
const OffsetPair offset2 = OffsetPair(
local: Offset(50, 60),
global: Offset(70, 80),
);
final OffsetPair sum = offset2 + offset1;
expect(sum.local, const Offset(60, 80));
expect(sum.global, const Offset(100, 120));
final OffsetPair difference = offset2 - offset1;
expect(difference.local, const Offset(40, 40));
expect(difference.global, const Offset(40, 40));
});
testWidgets('EagerGestureRecognizer asserts when kind and supportedDevices are both set', (WidgetTester tester) async {
expect(
() {
EagerGestureRecognizer(
kind: PointerDeviceKind.touch,
supportedDevices: <PointerDeviceKind>{ PointerDeviceKind.touch },
);
},
throwsA(
isA<AssertionError>().having((AssertionError error) => error.toString(),
'description', contains('kind == null || supportedDevices == null')),
),
);
});
group('PrimaryPointerGestureRecognizer', () {
testGesture('cleans up state after winning arena', (GestureTester tester) {
final List<String> resolutions = <String>[];
final IndefiniteGestureRecognizer indefinite = IndefiniteGestureRecognizer();
final TestPrimaryPointerGestureRecognizer<PointerUpEvent> accepting = TestPrimaryPointerGestureRecognizer<PointerUpEvent>(
GestureDisposition.accepted,
onAcceptGesture: () => resolutions.add('accepted'),
onRejectGesture: () => resolutions.add('rejected'),
);
expect(accepting.state, GestureRecognizerState.ready);
expect(accepting.primaryPointer, isNull);
expect(accepting.initialPosition, isNull);
expect(resolutions, <String>[]);
indefinite.addPointer(down);
accepting.addPointer(down);
expect(accepting.state, GestureRecognizerState.possible);
expect(accepting.primaryPointer, 5);
expect(accepting.initialPosition!.global, down.position);
expect(accepting.initialPosition!.local, down.localPosition);
expect(resolutions, <String>[]);
tester.closeArena(5);
tester.async.flushMicrotasks();
tester.route(down);
tester.route(up);
expect(accepting.state, GestureRecognizerState.ready);
expect(accepting.primaryPointer, 5);
expect(accepting.initialPosition, isNull);
expect(resolutions, <String>['accepted']);
});
testGesture('cleans up state after losing arena', (GestureTester tester) {
final List<String> resolutions = <String>[];
final IndefiniteGestureRecognizer indefinite = IndefiniteGestureRecognizer();
final TestPrimaryPointerGestureRecognizer<PointerMoveEvent> rejecting = TestPrimaryPointerGestureRecognizer<PointerMoveEvent>(
GestureDisposition.rejected,
onAcceptGesture: () => resolutions.add('accepted'),
onRejectGesture: () => resolutions.add('rejected'),
);
expect(rejecting.state, GestureRecognizerState.ready);
expect(rejecting.primaryPointer, isNull);
expect(rejecting.initialPosition, isNull);
expect(resolutions, <String>[]);
indefinite.addPointer(down);
rejecting.addPointer(down);
expect(rejecting.state, GestureRecognizerState.possible);
expect(rejecting.primaryPointer, 5);
expect(rejecting.initialPosition!.global, down.position);
expect(rejecting.initialPosition!.local, down.localPosition);
expect(resolutions, <String>[]);
tester.closeArena(5);
tester.async.flushMicrotasks();
tester.route(down);
tester.route(move);
expect(rejecting.state, GestureRecognizerState.defunct);
expect(rejecting.primaryPointer, 5);
expect(rejecting.initialPosition!.global, down.position);
expect(rejecting.initialPosition!.local, down.localPosition);
expect(resolutions, <String>['rejected']);
tester.route(up);
expect(rejecting.state, GestureRecognizerState.ready);
expect(rejecting.primaryPointer, 5);
expect(rejecting.initialPosition, isNull);
expect(resolutions, <String>['rejected']);
});
testGesture('works properly when recycled', (GestureTester tester) {
final List<String> resolutions = <String>[];
final IndefiniteGestureRecognizer indefinite = IndefiniteGestureRecognizer();
final TestPrimaryPointerGestureRecognizer<PointerUpEvent> accepting = TestPrimaryPointerGestureRecognizer<PointerUpEvent>(
GestureDisposition.accepted,
preAcceptSlopTolerance: 15,
postAcceptSlopTolerance: 1000,
onAcceptGesture: () => resolutions.add('accepted'),
onRejectGesture: () => resolutions.add('rejected'),
);
// Send one complete pointer sequence
indefinite.addPointer(down);
accepting.addPointer(down);
tester.closeArena(5);
tester.async.flushMicrotasks();
tester.route(down);
tester.route(up);
expect(resolutions, <String>['accepted']);
resolutions.clear();
// Send a follow-on sequence that breaks preAcceptSlopTolerance
indefinite.addPointer(down2);
accepting.addPointer(down2);
tester.closeArena(6);
tester.async.flushMicrotasks();
tester.route(down2);
tester.route(move2);
expect(resolutions, <String>['rejected']);
tester.route(up2);
expect(resolutions, <String>['rejected']);
});
});
}
class TestGestureRecognizer extends GestureRecognizer {
TestGestureRecognizer({ Object? debugOwner }) : super(debugOwner: debugOwner);
@override
String get debugDescription => 'debugDescription content';
@override
void addPointer(PointerDownEvent event) { }
@override
void acceptGesture(int pointer) { }
@override
void rejectGesture(int pointer) { }
}
/// Gesture recognizer that adds itself to the gesture arena but never
/// resolves itself.
class IndefiniteGestureRecognizer extends GestureRecognizer {
@override
void addAllowedPointer(PointerDownEvent event) {
GestureBinding.instance!.gestureArena.add(event.pointer, this);
}
@override
void acceptGesture(int pointer) { }
@override
void rejectGesture(int pointer) { }
@override
String get debugDescription => 'Unresolving';
}
/// Gesture recognizer that resolves with [resolution] when it handles an event
/// on the primary pointer of type [T]
class TestPrimaryPointerGestureRecognizer<T extends PointerEvent> extends PrimaryPointerGestureRecognizer {
TestPrimaryPointerGestureRecognizer(
this.resolution, {
this.onAcceptGesture,
this.onRejectGesture,
double? preAcceptSlopTolerance,
double? postAcceptSlopTolerance,
}) : super(
preAcceptSlopTolerance: preAcceptSlopTolerance,
postAcceptSlopTolerance: postAcceptSlopTolerance,
);
final GestureDisposition resolution;
final VoidCallback? onAcceptGesture;
final VoidCallback? onRejectGesture;
@override
void acceptGesture(int pointer) {
super.acceptGesture(pointer);
if (onAcceptGesture != null) {
onAcceptGesture!();
}
}
@override
void rejectGesture(int pointer) {
super.rejectGesture(pointer);
if (onRejectGesture != null) {
onRejectGesture!();
}
}
@override
void handlePrimaryPointer(PointerEvent event) {
if (event is T) {
resolve(resolution);
}
}
@override
String get debugDescription => 'TestPrimaryPointer';
}