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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 'package:flutter/gestures.dart';
import 'package:flutter_test/flutter_test.dart';
import 'gesture_tester.dart';
class TestDrag extends Drag { }
void main() {
TestWidgetsFlutterBinding.ensureInitialized();
testGesture('MultiDrag: moving before delay rejects', (GestureTester tester) {
final DelayedMultiDragGestureRecognizer drag = DelayedMultiDragGestureRecognizer();
bool didStartDrag = false;
drag.onStart = (Offset position) {
didStartDrag = true;
return TestDrag();
};
final TestPointer pointer = TestPointer(5);
final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
drag.addPointer(down);
tester.closeArena(5);
expect(didStartDrag, isFalse);
tester.async.flushMicrotasks();
expect(didStartDrag, isFalse);
tester.route(pointer.move(const Offset(20.0, 60.0))); // move more than touch slop before delay expires
expect(didStartDrag, isFalse);
tester.async.elapse(kLongPressTimeout * 2); // expire delay
expect(didStartDrag, isFalse);
tester.route(pointer.move(const Offset(30.0, 120.0))); // move some more after delay expires
expect(didStartDrag, isFalse);
drag.dispose();
});
testGesture('MultiDrag: delay triggers', (GestureTester tester) {
final DelayedMultiDragGestureRecognizer drag = DelayedMultiDragGestureRecognizer();
bool didStartDrag = false;
drag.onStart = (Offset position) {
didStartDrag = true;
return TestDrag();
};
final TestPointer pointer = TestPointer(5);
final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
drag.addPointer(down);
tester.closeArena(5);
expect(didStartDrag, isFalse);
tester.async.flushMicrotasks();
expect(didStartDrag, isFalse);
tester.route(pointer.move(const Offset(20.0, 20.0))); // move less than touch slop before delay expires
expect(didStartDrag, isFalse);
tester.async.elapse(kLongPressTimeout * 2); // expire delay
expect(didStartDrag, isTrue);
tester.route(pointer.move(const Offset(30.0, 70.0))); // move more than touch slop after delay expires
expect(didStartDrag, isTrue);
drag.dispose();
});
testGesture('MultiDrag: can filter based on device kind', (GestureTester tester) {
final DelayedMultiDragGestureRecognizer drag =
DelayedMultiDragGestureRecognizer(kind: PointerDeviceKind.touch);
bool didStartDrag = false;
drag.onStart = (Offset position) {
didStartDrag = true;
return TestDrag();
};
final TestPointer mousePointer = TestPointer(5, PointerDeviceKind.mouse);
final PointerDownEvent down = mousePointer.down(const Offset(10.0, 10.0));
drag.addPointer(down);
tester.closeArena(5);
expect(didStartDrag, isFalse);
tester.async.flushMicrotasks();
expect(didStartDrag, isFalse);
tester.route(mousePointer.move(const Offset(20.0, 20.0))); // move less than touch slop before delay expires
expect(didStartDrag, isFalse);
tester.async.elapse(kLongPressTimeout * 2); // expire delay
// Still false because it shouldn't recognize mouse events.
expect(didStartDrag, isFalse);
tester.route(mousePointer.move(const Offset(30.0, 70.0))); // move more than touch slop after delay expires
// And still false.
expect(didStartDrag, isFalse);
drag.dispose();
});
testWidgets('ImmediateMultiGestureRecognizer asserts when kind and supportedDevices are both set', (WidgetTester tester) async {
try {
ImmediateMultiDragGestureRecognizer(
kind: PointerDeviceKind.touch,
supportedDevices: <PointerDeviceKind>{ PointerDeviceKind.touch },
);
} catch(error) {
expect(error, isAssertionError);
expect(error.toString(), contains('kind == null || supportedDevices == null'));
}
});
testWidgets('HorizontalMultiDragGestureRecognizer asserts when kind and supportedDevices are both set', (WidgetTester tester) async {
expect(
() {
HorizontalMultiDragGestureRecognizer(
kind: PointerDeviceKind.touch,
supportedDevices: <PointerDeviceKind>{ PointerDeviceKind.touch },
);
},
throwsA(
isA<AssertionError>().having((AssertionError error) => error.toString(),
'description', contains('kind == null || supportedDevices == null')),
),
);
});
testWidgets('VerticalMultiDragGestureRecognizer asserts when kind and supportedDevices are both set', (WidgetTester tester) async {
expect(
() {
VerticalMultiDragGestureRecognizer(
kind: PointerDeviceKind.touch,
supportedDevices: <PointerDeviceKind>{ PointerDeviceKind.touch },
);
},
throwsA(
isA<AssertionError>().having((AssertionError error) => error.toString(),
'description', contains('kind == null || supportedDevices == null')),
),
);
});
testWidgets('DelayedMultiDragGestureRecognizer asserts when kind and supportedDevices are both set', (WidgetTester tester) async {
expect(
() {
DelayedMultiDragGestureRecognizer(
kind: PointerDeviceKind.touch,
supportedDevices: <PointerDeviceKind>{ PointerDeviceKind.touch },
);
},
throwsA(
isA<AssertionError>().having((AssertionError error) => error.toString(),
'description', contains('kind == null || supportedDevices == null')),
),
);
});
}