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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_test/flutter_test.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'gesture_tester.dart';
void main() {
setUp(ensureGestureBinding);
testGesture('A force press can be recognized', (GestureTester tester) {
// Device specific constants that represent those from the iPhone X
const double pressureMin = 0;
const double pressureMax = 6.66;
// Interpolated Flutter pressure values.
const double startPressure = 0.4; // = Device pressure of 2.66.
const double peakPressure = 0.85; // = Device pressure of 5.66.
int started = 0;
int peaked = 0;
int updated = 0;
int ended = 0;
Offset startGlobalPosition;
void onStart(ForcePressDetails details) {
startGlobalPosition = details.globalPosition;
started += 1;
}
final ForcePressGestureRecognizer force = ForcePressGestureRecognizer(startPressure: startPressure, peakPressure: peakPressure);
force.onStart = onStart;
force.onPeak = (ForcePressDetails details) => peaked += 1;
force.onUpdate = (ForcePressDetails details) => updated += 1;
force.onEnd = (ForcePressDetails details) => ended += 1;
const int pointerValue = 1;
final TestPointer pointer = TestPointer(pointerValue);
const PointerDownEvent down = PointerDownEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 0, pressureMin: pressureMin, pressureMax: pressureMax);
pointer.setDownInfo(down, const Offset(10.0, 10.0));
force.addPointer(down);
tester.closeArena(pointerValue);
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
// Pressure fed into the test environment simulates the values received directly from the device.
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 2.5, pressureMin: pressureMin, pressureMax: pressureMax));
// We have not hit the start pressure, so no events should be true.
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 2.8, pressureMin: pressureMin, pressureMax: pressureMax));
// We have just hit the start pressure so just the start event should be triggered and one update call should have occurred.
expect(started, 1);
expect(peaked, 0);
expect(updated, 1);
expect(ended, 0);
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 3.3, pressureMin: pressureMin, pressureMax: pressureMax));
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 4.0, pressureMin: pressureMin, pressureMax: pressureMax));
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 5.0, pressureMin: pressureMin, pressureMax: pressureMax));
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 1.0, pressureMin: pressureMin, pressureMax: pressureMax));
// We have exceeded the start pressure so update should be greater than 0.
expect(started, 1);
expect(updated, 5);
expect(peaked, 0);
expect(ended, 0);
expect(startGlobalPosition, const Offset(10.0, 10.0));
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 6.0, pressureMin: pressureMin, pressureMax: pressureMax));
// We have exceeded the peak pressure so peak pressure should be true.
expect(started, 1);
expect(updated, 6);
expect(peaked, 1);
expect(ended, 0);
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 3.3, pressureMin: pressureMin, pressureMax: pressureMax));
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 4.0, pressureMin: pressureMin, pressureMax: pressureMax));
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 5.0, pressureMin: pressureMin, pressureMax: pressureMax));
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 1.0, pressureMin: pressureMin, pressureMax: pressureMax));
// Update is still called.
expect(started, 1);
expect(updated, 10);
expect(peaked, 1);
expect(ended, 0);
tester.route(pointer.up());
// We have ended the gesture so ended should be true.
expect(started, 1);
expect(updated, 10);
expect(peaked, 1);
expect(ended, 1);
});
testGesture('Invalid pressure ranges capabilities are not recognized', (GestureTester tester) {
void testGestureWithMaxPressure(double pressureMax) {
int started = 0;
int peaked = 0;
int updated = 0;
int ended = 0;
final ForcePressGestureRecognizer force = ForcePressGestureRecognizer();
force.onStart = (ForcePressDetails details) => started += 1;
force.onPeak = (ForcePressDetails details) => peaked += 1;
force.onUpdate = (ForcePressDetails details) => updated += 1;
force.onEnd = (ForcePressDetails details) => ended += 1;
const int pointerValue = 1;
final TestPointer pointer = TestPointer(pointerValue);
final PointerDownEvent down = PointerDownEvent(pointer: pointerValue, position: const Offset(10.0, 10.0), pressure: 0, pressureMin: 0, pressureMax: pressureMax);
pointer.setDownInfo(down, const Offset(10.0, 10.0));
force.addPointer(down);
tester.closeArena(pointerValue);
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
// Pressure fed into the test environment simulates the values received directly from the device.
tester.route(PointerMoveEvent(pointer: pointerValue, position: const Offset(10.0, 10.0), pressure: 10, pressureMin: 0, pressureMax: pressureMax));
// Regardless of current pressure, this recognizer shouldn't participate or
// trigger any callbacks.
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
tester.route(pointer.up());
// There should still be no callbacks.
expect(started, 0);
expect(updated, 0);
expect(peaked, 0);
expect(ended, 0);
}
testGestureWithMaxPressure(0);
testGestureWithMaxPressure(1);
testGestureWithMaxPressure(-1);
testGestureWithMaxPressure(0.5);
});
testGesture('If minimum pressure is not reached, start and end callbacks are not called', (GestureTester tester) {
// Device specific constants that represent those from the iPhone X
const double pressureMin = 0;
const double pressureMax = 6.66;
// Interpolated Flutter pressure values.
const double startPressure = 0.4; // = Device pressure of 2.66.
const double peakPressure = 0.85; // = Device pressure of 5.66.
int started = 0;
int peaked = 0;
int updated = 0;
int ended = 0;
final ForcePressGestureRecognizer force = ForcePressGestureRecognizer(startPressure: startPressure, peakPressure: peakPressure);
force.onStart = (_) => started += 1;
force.onPeak = (_) => peaked += 1;
force.onUpdate = (_) => updated += 1;
force.onEnd = (_) => ended += 1;
const int pointerValue = 1;
final TestPointer pointer = TestPointer(pointerValue);
const PointerDownEvent down = PointerDownEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 0, pressureMin: pressureMin, pressureMax: pressureMax);
pointer.setDownInfo(down, const Offset(10.0, 10.0));
force.addPointer(down);
tester.closeArena(1);
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
// Pressure fed into the test environment simulates the values received directly from the device.
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 2.5, pressureMin: pressureMin, pressureMax: pressureMax));
// We have not hit the start pressure, so no events should be true.
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
tester.route(pointer.up());
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
});
testGesture('Should recognize drag and not force touch if there is a drag recognizer', (GestureTester tester) {
final PanGestureRecognizer drag = PanGestureRecognizer();
// Device specific constants that represent those from the iPhone X
const double pressureMin = 0;
const double pressureMax = 6.66;
// Interpolated Flutter pressure values.
const double startPressure = 0.4; // = Device pressure of 2.66.
const double peakPressure = 0.85; // = Device pressure of 5.66.
int started = 0;
int peaked = 0;
int updated = 0;
int ended = 0;
final ForcePressGestureRecognizer force = ForcePressGestureRecognizer(startPressure: startPressure, peakPressure: peakPressure);
force.onStart = (_) => started += 1;
force.onPeak = (_) => peaked += 1;
force.onUpdate = (_) => updated += 1;
force.onEnd = (_) => ended += 1;
int didStartPan = 0;
drag.onStart = (_) => didStartPan += 1;
const int pointerValue = 1;
final TestPointer pointer = TestPointer(pointerValue);
const PointerDownEvent down = PointerDownEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 1.0, pressureMin: pressureMin, pressureMax: pressureMax);
pointer.setDownInfo(down, const Offset(10.0, 10.0));
force.addPointer(down);
drag.addPointer(down);
tester.closeArena(1);
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
expect(didStartPan, 0);
tester.route(pointer.move(const Offset(30.0, 30.0))); // moved 20 horizontally and 20 vertically which is 28 total
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
expect(didStartPan, 1);
// Pressure fed into the test environment simulates the values received directly from the device.
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 2.5, pressureMin: pressureMin, pressureMax: pressureMax));
// We have not hit the start pressure, so no events should be true.
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
expect(didStartPan, 1);
// We don't expect any events from the force press recognizer.
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 4.0, pressureMin: pressureMin, pressureMax: pressureMax));
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
expect(didStartPan, 1);
tester.route(pointer.up());
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
expect(didStartPan, 1);
});
testGesture('Should not call ended on pointer up if the gesture was never accepted', (GestureTester tester) {
final PanGestureRecognizer drag = PanGestureRecognizer();
// Interpolated Flutter pressure values.
const double startPressure = 0.4; // = Device pressure of 2.66.
const double peakPressure = 0.85; // = Device pressure of 5.66.
// Device specific constants that represent those from the iPhone X
const double pressureMin = 0;
const double pressureMax = 6.66;
int started = 0;
int peaked = 0;
int updated = 0;
int ended = 0;
final ForcePressGestureRecognizer force = ForcePressGestureRecognizer(startPressure: startPressure, peakPressure: peakPressure);
force.onStart = (_) => started += 1;
force.onPeak = (_) => peaked += 1;
force.onUpdate = (_) => updated += 1;
force.onEnd = (_) => ended += 1;
int didStartPan = 0;
drag.onStart = (_) => didStartPan += 1;
const int pointerValue = 1;
final TestPointer pointer = TestPointer(pointerValue);
const PointerDownEvent down = PointerDownEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 1.0, pressureMin: pressureMin, pressureMax: pressureMax);
pointer.setDownInfo(down, const Offset(10.0, 10.0));
force.addPointer(down);
drag.addPointer(down);
tester.closeArena(1);
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
expect(didStartPan, 0);
tester.route(pointer.up());
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
expect(didStartPan, 0);
});
testGesture('Should call start only once if there is a competing gesture recognizer', (GestureTester tester) {
final PanGestureRecognizer drag = PanGestureRecognizer();
// Interpolated Flutter pressure values.
const double startPressure = 0.4; // = Device pressure of 2.66.
const double peakPressure = 0.85; // = Device pressure of 5.66.
// Device specific constants that represent those from the iPhone X
const double pressureMin = 0;
const double pressureMax = 6.66;
int started = 0;
int peaked = 0;
int updated = 0;
int ended = 0;
final ForcePressGestureRecognizer force = ForcePressGestureRecognizer(startPressure: startPressure, peakPressure: peakPressure);
force.onStart = (_) => started += 1;
force.onPeak = (_) => peaked += 1;
force.onUpdate = (_) => updated += 1;
force.onEnd = (_) => ended += 1;
int didStartPan = 0;
drag.onStart = (_) => didStartPan += 1;
const int pointerValue = 1;
final TestPointer pointer = TestPointer(pointerValue);
const PointerDownEvent down = PointerDownEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 1.0, pressureMin: pressureMin, pressureMax: pressureMax);
pointer.setDownInfo(down, const Offset(10.0, 10.0));
force.addPointer(down);
drag.addPointer(down);
tester.closeArena(1);
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
expect(didStartPan, 0);
// Pressure fed into the test environment simulates the values received directly from the device.
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 3.0, pressureMin: pressureMin, pressureMax: pressureMax));
// We have not hit the start pressure, so no events should be true.
expect(started, 1);
expect(peaked, 0);
expect(updated, 1);
expect(ended, 0);
expect(didStartPan, 0);
tester.route(pointer.up());
expect(started, 1);
expect(peaked, 0);
expect(updated, 1);
expect(ended, 1);
expect(didStartPan, 0);
});
testGesture('A force press can be recognized with a custom interpolation function', (GestureTester tester) {
// Device specific constants that represent those from the iPhone X
const double pressureMin = 0;
const double pressureMax = 6.66;
// Interpolated Flutter pressure values.
const double startPressure = 0.4; // = Device pressure of 2.66.
const double peakPressure = 0.85; // = Device pressure of 5.66.
int started = 0;
int peaked = 0;
int updated = 0;
int ended = 0;
Offset startGlobalPosition;
void onStart(ForcePressDetails details) {
startGlobalPosition = details.globalPosition;
started += 1;
}
double interpolateWithEasing(double min, double max, double t) {
final double lerp = (t - min) / (max - min);
return Curves.easeIn.transform(lerp);
}
final ForcePressGestureRecognizer force = ForcePressGestureRecognizer(startPressure: startPressure, peakPressure: peakPressure, interpolation: interpolateWithEasing);
force.onStart = onStart;
force.onPeak = (ForcePressDetails details) => peaked += 1;
force.onUpdate = (ForcePressDetails details) => updated += 1;
force.onEnd = (ForcePressDetails details) => ended += 1;
const int pointerValue = 1;
final TestPointer pointer = TestPointer(pointerValue);
const PointerDownEvent down = PointerDownEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 0, pressureMin: pressureMin, pressureMax: pressureMax);
pointer.setDownInfo(down, const Offset(10.0, 10.0));
force.addPointer(down);
tester.closeArena(pointerValue);
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
// Pressure fed into the test environment simulates the values received directly from the device.
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 2.5, pressureMin: pressureMin, pressureMax: pressureMax));
// We have not hit the start pressure, so no events should be true.
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 2.8, pressureMin: pressureMin, pressureMax: pressureMax));
// We have just hit the start pressure so just the start event should be triggered and one update call should have occurred.
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 3.3, pressureMin: pressureMin, pressureMax: pressureMax));
expect(started, 0);
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 4.0, pressureMin: pressureMin, pressureMax: pressureMax));
expect(started, 1);
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 5.0, pressureMin: pressureMin, pressureMax: pressureMax));
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 1.0, pressureMin: pressureMin, pressureMax: pressureMax));
// We have exceeded the start pressure so update should be greater than 0.
expect(started, 1);
expect(updated, 3);
expect(peaked, 0);
expect(ended, 0);
expect(startGlobalPosition, const Offset(10.0, 10.0));
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 6.0, pressureMin: pressureMin, pressureMax: pressureMax));
// We have exceeded the peak pressure so peak pressure should be true.
expect(started, 1);
expect(updated, 4);
expect(peaked, 0);
expect(ended, 0);
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 3.3, pressureMin: pressureMin, pressureMax: pressureMax));
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 4.0, pressureMin: pressureMin, pressureMax: pressureMax));
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 6.5, pressureMin: pressureMin, pressureMax: pressureMax));
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 1.0, pressureMin: pressureMin, pressureMax: pressureMax));
// Update is still called.
expect(started, 1);
expect(updated, 8);
expect(peaked, 1);
expect(ended, 0);
tester.route(pointer.up());
// We have ended the gesture so ended should be true.
expect(started, 1);
expect(updated, 8);
expect(peaked, 1);
expect(ended, 1);
});
testGesture('A pressure outside of the device reported min and max pressure will not give an error', (GestureTester tester) {
// Device specific constants that represent those from the iPhone X
const double pressureMin = 0;
const double pressureMax = 6.66;
// Interpolated Flutter pressure values.
const double startPressure = 0.4; // = Device pressure of 2.66.
const double peakPressure = 0.85; // = Device pressure of 5.66.
int started = 0;
int peaked = 0;
int updated = 0;
int ended = 0;
final ForcePressGestureRecognizer force = ForcePressGestureRecognizer(startPressure: startPressure, peakPressure: peakPressure);
force.onStart = (_) => started += 1;
force.onPeak = (_) => peaked += 1;
force.onUpdate = (_) => updated += 1;
force.onEnd = (_) => ended += 1;
const int pointerValue = 1;
final TestPointer pointer = TestPointer(pointerValue);
const PointerDownEvent down = PointerDownEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 0, pressureMin: pressureMin, pressureMax: pressureMax);
pointer.setDownInfo(down, const Offset(10.0, 10.0));
force.addPointer(down);
tester.closeArena(1);
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
// Pressure fed into the test environment simulates the values received directly from the device.
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 2.5, pressureMin: pressureMin, pressureMax: pressureMax));
// We have not hit the start pressure, so no events should be true.
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
// If the case where the pressure is greater than the max pressure were not handled correctly, this move event would throw an error.
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 8.0, pressureMin: pressureMin, pressureMax: pressureMax));
tester.route(pointer.up());
expect(started, 1);
expect(peaked, 1);
expect(updated, 1);
expect(ended, 1);
});
testGesture('A pressure of NAN will not give an error', (GestureTester tester) {
// Device specific constants that represent those from the iPhone X
const double pressureMin = 0;
const double pressureMax = 6.66;
// Interpolated Flutter pressure values.
const double startPressure = 0.4; // = Device pressure of 2.66.
const double peakPressure = 0.85; // = Device pressure of 5.66.
int started = 0;
int peaked = 0;
int updated = 0;
int ended = 0;
final ForcePressGestureRecognizer force = ForcePressGestureRecognizer(startPressure: startPressure, peakPressure: peakPressure);
force.onStart = (_) => started += 1;
force.onPeak = (_) => peaked += 1;
force.onUpdate = (_) => updated += 1;
force.onEnd = (_) => ended += 1;
const int pointerValue = 1;
final TestPointer pointer = TestPointer(pointerValue);
const PointerDownEvent down = PointerDownEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 0, pressureMin: pressureMin, pressureMax: pressureMax);
pointer.setDownInfo(down, const Offset(10.0, 10.0));
force.addPointer(down);
tester.closeArena(1);
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
// Pressure fed into the test environment simulates the values received directly from the device.
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 2.5, pressureMin: pressureMin, pressureMax: pressureMax));
// We have not hit the start pressure, so no events should be true.
expect(started, 0);
expect(peaked, 0);
expect(updated, 0);
expect(ended, 0);
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 6.0, pressureMin: pressureMin, pressureMax: pressureMax));
expect(peaked, 1);
tester.route(const PointerMoveEvent(pointer: pointerValue, position: Offset(10.0, 10.0), pressure: 0.0 / 0.0, pressureMin: pressureMin, pressureMax: pressureMax));
tester.route(pointer.up());
expect(started, 1);
expect(peaked, 1);
expect(updated, 1);
expect(ended, 1);
});
}