blob: ddf7855d7fac415f622ab6f0e6fb9b44f32acf3b [file] [log] [blame]
// Copyright 2016 The Chromium 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';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:flutter/gestures.dart';
void main() {
testWidgets(
'WidgetTester.drag must break the offset into multiple parallel components if'
'the drag goes outside the touch slop values',
(WidgetTester tester) async {
// The first Offset in every sub array (ie. offsetResults[i][0]) is (touchSlopX, touchSlopY).
// The second Offset in every sub array (ie. offsetResults[i][1]) will be the total move offset.
// The remaining values in every sub array are the expected separated drag offsets.
// This test checks to make sure that the total drag will be correctly split into
// pieces such that the first (and potentially second) moveBy function call(s) in
// controller.drag() will never have a component greater than the touch
// slop in that component's respective axis.
final List<List<Offset>> offsetResults = <List<Offset>>[
<Offset>[
const Offset(10.0, 10.0),
const Offset(-150.0, 200.0),
const Offset(-7.5, 10.0),
const Offset(-2.5, 3.333333333333333),
const Offset(-140.0, 186.66666666666666),
],
<Offset>[
const Offset(10.0, 10.0),
const Offset(150, -200),
const Offset(7.5, -10),
const Offset(2.5, -3.333333333333333),
const Offset(140.0, -186.66666666666666),
],
<Offset>[
const Offset(10.0, 10.0),
const Offset(-200, 150),
const Offset(-10, 7.5),
const Offset(-3.333333333333333, 2.5),
const Offset(-186.66666666666666, 140.0),
],
<Offset>[
const Offset(10.0, 10.0),
const Offset(200.0, -150.0),
const Offset(10, -7.5),
const Offset(3.333333333333333, -2.5),
const Offset(186.66666666666666, -140.0),
],
<Offset>[
const Offset(10.0, 10.0),
const Offset(-150.0, -200.0),
const Offset(-7.5, -10.0),
const Offset(-2.5, -3.333333333333333),
const Offset(-140.0, -186.66666666666666),
],
<Offset>[
const Offset(10.0, 10.0),
const Offset(8.0, 3.0),
const Offset(8.0, 3.0),
],
<Offset>[
const Offset(10.0, 10.0),
const Offset(3.0, 8.0),
const Offset(3.0, 8.0),
],
<Offset>[
const Offset(10.0, 10.0),
const Offset(20.0, 5.0),
const Offset(10.0, 2.5),
const Offset(10.0, 2.5),
],
<Offset>[
const Offset(10.0, 10.0),
const Offset(5.0, 20.0),
const Offset(2.5, 10.0),
const Offset(2.5, 10.0),
],
<Offset>[
const Offset(10.0, 10.0),
const Offset(20.0, 15.0),
const Offset(10.0, 7.5),
const Offset(3.333333333333333, 2.5),
const Offset(6.666666666666668, 5.0),
],
<Offset>[
const Offset(10.0, 10.0),
const Offset(15.0, 20.0),
const Offset(7.5, 10.0),
const Offset(2.5, 3.333333333333333),
const Offset(5.0, 6.666666666666668),
],
<Offset>[
const Offset(10.0, 10.0),
const Offset(20.0, 20.0),
const Offset(10.0, 10.0),
const Offset(10.0, 10.0),
],
<Offset>[
const Offset(10.0, 10.0),
const Offset(0.0, 5.0),
const Offset(0.0, 5.0),
],
//// [VARYING TOUCH SLOP] ////
<Offset>[
const Offset(12.0, 5.0),
const Offset(0.0, 5.0),
const Offset(0.0, 5.0),
],
<Offset>[
const Offset(12.0, 5.0),
const Offset(20.0, 5.0),
const Offset(12.0, 3.0),
const Offset(8.0, 2.0),
],
<Offset>[
const Offset(12.0, 5.0),
const Offset(5.0, 20.0),
const Offset(1.25, 5.0),
const Offset(3.75, 15.0),
],
<Offset>[
const Offset(5.0, 12.0),
const Offset(5.0, 20.0),
const Offset(3.0, 12.0),
const Offset(2.0, 8.0),
],
<Offset>[
const Offset(5.0, 12.0),
const Offset(20.0, 5.0),
const Offset(5.0, 1.25),
const Offset(15.0, 3.75),
],
<Offset>[
const Offset(18.0, 18.0),
const Offset(0.0, 150.0),
const Offset(0.0, 18.0),
const Offset(0.0, 132.0),
],
<Offset>[
const Offset(18.0, 18.0),
const Offset(0.0, -150.0),
const Offset(0.0, -18.0),
const Offset(0.0, -132.0),
],
<Offset>[
const Offset(18.0, 18.0),
const Offset(-150.0, 0.0),
const Offset(-18.0, 0.0),
const Offset(-132.0, 0.0),
],
<Offset>[
const Offset(0.0, 0.0),
const Offset(-150.0, 0.0),
const Offset(-150.0, 0.0),
],
<Offset>[
const Offset(18.0, 18.0),
const Offset(-32.0, 0.0),
const Offset(-18.0, 0.0),
const Offset(-14.0, 0.0),
],
];
await tester.pumpWidget(
const Directionality(
textDirection: TextDirection.ltr,
child: Text('test'),
),
);
final WidgetControllerSpy spyController = WidgetControllerSpy(tester.binding);
for (int resultIndex = 0; resultIndex < offsetResults.length; resultIndex += 1) {
final List<Offset> testResult = offsetResults[resultIndex];
await spyController.drag(
find.text('test'),
testResult[1],
touchSlopX: testResult[0].dx,
touchSlopY: testResult[0].dy,
);
final List<Offset> dragOffsets = spyController.testGestureSpy.offsets;
expect(
offsetResults[resultIndex].length - 2,
dragOffsets.length,
reason:
'There is a difference in the number of expected and actual split offsets for the drag with:\n'
'Touch Slop: ' + testResult[0].toString() + '\n'
'Delta: ' + testResult[1].toString() + '\n',
);
for (int valueIndex = 2; valueIndex < offsetResults[resultIndex].length; valueIndex += 1) {
expect(
offsetResults[resultIndex][valueIndex],
dragOffsets[valueIndex - 2],
reason:
'There is a difference in the expected and actual value of the ' +
(valueIndex == 2 ? 'first' : valueIndex == 3 ? 'second' : 'third') +
' split offset for the drag with:\n'
'Touch slop: ' + testResult[0].toString() + '\n'
'Delta: ' + testResult[1].toString() + '\n',
);
}
spyController.testGestureSpy.clearOffsets();
}
},
);
}
class WidgetControllerSpy extends WidgetController {
WidgetControllerSpy(
TestWidgetsFlutterBinding binding,
) : super(binding) {
_binding = binding;
}
TestWidgetsFlutterBinding _binding;
@override
Future<void> pump(Duration duration) async {
if (duration != null)
await Future<void>.delayed(duration);
_binding.scheduleFrame();
await _binding.endOfFrame;
}
int _getNextPointer() {
final int result = nextPointer;
nextPointer += 1;
return result;
}
@override
Future<void> sendEventToBinding(PointerEvent event, HitTestResult result) {
return TestAsyncUtils.guard<void>(() async {
_binding.dispatchEvent(event, result, source: TestBindingEventSource.test);
});
}
TestGestureSpy testGestureSpy;
@override
Future<TestGesture> createGesture({int pointer, PointerDeviceKind kind = PointerDeviceKind.touch}) async {
return testGestureSpy = TestGestureSpy(
pointer: pointer ?? _getNextPointer(),
kind: kind,
dispatcher: sendEventToBinding,
hitTester: hitTestOnBinding,
);
}
}
class TestGestureSpy extends TestGesture {
TestGestureSpy({
int pointer,
PointerDeviceKind kind,
EventDispatcher dispatcher,
HitTester hitTester,
}) : super(
pointer: pointer,
kind: kind,
dispatcher: dispatcher,
hitTester: hitTester
);
List<Offset> offsets = <Offset>[];
void clearOffsets() {
offsets = <Offset>[];
}
@override
Future<void> moveBy(Offset offset, {Duration timeStamp = Duration.zero}) {
offsets.add(offset);
return super.moveBy(offset, timeStamp: timeStamp);
}
}