drag_test.dart 41.5 KB
Newer Older
Ian Hickson's avatar
Ian Hickson committed
1
// Copyright 2014 The Flutter Authors. All rights reserved.
Ian Hickson's avatar
Ian Hickson committed
2 3 4
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

Adam Barth's avatar
Adam Barth committed
5
import 'package:flutter_test/flutter_test.dart';
6
import 'package:flutter/gestures.dart';
jslavitz's avatar
jslavitz committed
7
import 'package:flutter/material.dart';
8

9 10
import 'gesture_tester.dart';

11
void main() {
12
  setUp(ensureGestureBinding);
13

14
  testGesture('Should recognize pan', (GestureTester tester) {
15
    final PanGestureRecognizer pan = PanGestureRecognizer();
16
    final TapGestureRecognizer tap = TapGestureRecognizer()..onTap = () {};
17 18
    addTearDown(pan.dispose);
    addTearDown(tap.dispose);
19

20
    bool didStartPan = false;
21
    pan.onStart = (_) {
22
      didStartPan = true;
23 24
    };

Ian Hickson's avatar
Ian Hickson committed
25
    Offset updatedScrollDelta;
26 27
    pan.onUpdate = (DragUpdateDetails details) {
      updatedScrollDelta = details.delta;
28 29
    };

30
    bool didEndPan = false;
31
    pan.onEnd = (DragEndDetails details) {
32
      didEndPan = true;
33 34
    };

35 36 37 38
    bool didTap = false;
    tap.onTap = () {
      didTap = true;
    };
39

40
    final TestPointer pointer = TestPointer(5);
41
    final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
42 43
    pan.addPointer(down);
    tap.addPointer(down);
44
    tester.closeArena(5);
45 46 47 48 49
    expect(didStartPan, isFalse);
    expect(updatedScrollDelta, isNull);
    expect(didEndPan, isFalse);
    expect(didTap, isFalse);

50
    tester.route(down);
51 52 53 54 55
    expect(didStartPan, isFalse);
    expect(updatedScrollDelta, isNull);
    expect(didEndPan, isFalse);
    expect(didTap, isFalse);

56 57 58 59 60 61
    // touch should give up when it hits kTouchSlop, which was 18.0 when this test was last updated.

    tester.route(pointer.move(const Offset(20.0, 20.0))); // moved 10 horizontally and 10 vertically which is 14 total
    expect(didStartPan, isFalse); // 14 < 18
    tester.route(pointer.move(const Offset(20.0, 30.0))); // moved 10 horizontally and 20 vertically which is 22 total
    expect(didStartPan, isTrue); // 22 > 18
62 63 64 65
    didStartPan = false;
    expect(didEndPan, isFalse);
    expect(didTap, isFalse);

66
    tester.route(pointer.move(const Offset(20.0, 25.0)));
67
    expect(didStartPan, isFalse);
68
    expect(updatedScrollDelta, const Offset(0.0, -5.0));
69 70 71 72
    updatedScrollDelta = null;
    expect(didEndPan, isFalse);
    expect(didTap, isFalse);

73
    tester.route(pointer.up());
74 75 76 77 78
    expect(didStartPan, isFalse);
    expect(updatedScrollDelta, isNull);
    expect(didEndPan, isTrue);
    didEndPan = false;
    expect(didTap, isFalse);
79
  });
80

81
  testGesture('Should report most recent point to onStart by default', (GestureTester tester) {
82 83
    HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer();
    VerticalDragGestureRecognizer competingDrag = VerticalDragGestureRecognizer()
84
      ..onStart = (_) {};
85 86
    addTearDown(() => drag?.dispose);
    addTearDown(() => competingDrag?.dispose);
87 88 89 90 91 92 93 94 95 96 97 98 99 100 101

    Offset positionAtOnStart;
    drag.onStart = (DragStartDetails details) {
      positionAtOnStart = details.globalPosition;
    };

    final TestPointer pointer = TestPointer(5);
    final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
    drag.addPointer(down);
    competingDrag.addPointer(down);
    tester.closeArena(5);
    tester.route(down);

    tester.route(pointer.move(const Offset(30.0, 0.0)));
    drag.dispose();
102
    drag = null;
103
    competingDrag.dispose();
104
    competingDrag = null;
105 106 107 108 109

    expect(positionAtOnStart, const Offset(30.0, 00.0));
  });

  testGesture('Should report most recent point to onStart with a start configuration', (GestureTester tester) {
110 111
    HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer();
    VerticalDragGestureRecognizer competingDrag = VerticalDragGestureRecognizer()
112
      ..onStart = (_) {};
113 114
    addTearDown(() => drag?.dispose);
    addTearDown(() => competingDrag?.dispose);
115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133

    Offset positionAtOnStart;
    drag.onStart = (DragStartDetails details) {
      positionAtOnStart = details.globalPosition;
    };
    Offset updateOffset;
    drag.onUpdate = (DragUpdateDetails details) {
      updateOffset = details.globalPosition;
    };

    final TestPointer pointer = TestPointer(5);
    final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
    drag.addPointer(down);
    competingDrag.addPointer(down);
    tester.closeArena(5);
    tester.route(down);

    tester.route(pointer.move(const Offset(30.0, 0.0)));
    drag.dispose();
134
    drag = null;
135
    competingDrag.dispose();
136
    competingDrag = null;
137 138 139 140 141

    expect(positionAtOnStart, const Offset(30.0, 0.0));
    expect(updateOffset, null);
  });

142
  testGesture('Should recognize drag', (GestureTester tester) {
143
    final HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
144
    addTearDown(drag.dispose);
145 146 147 148 149 150 151

    bool didStartDrag = false;
    drag.onStart = (_) {
      didStartDrag = true;
    };

    double updatedDelta;
152 153
    drag.onUpdate = (DragUpdateDetails details) {
      updatedDelta = details.primaryDelta;
154 155 156
    };

    bool didEndDrag = false;
157
    drag.onEnd = (DragEndDetails details) {
158 159 160
      didEndDrag = true;
    };

161
    final TestPointer pointer = TestPointer(5);
162
    final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
163 164 165 166 167 168 169 170 171 172 173
    drag.addPointer(down);
    tester.closeArena(5);
    expect(didStartDrag, isFalse);
    expect(updatedDelta, isNull);
    expect(didEndDrag, isFalse);

    tester.route(down);
    expect(didStartDrag, isTrue);
    expect(updatedDelta, isNull);
    expect(didEndDrag, isFalse);

174
    tester.route(pointer.move(const Offset(20.0, 25.0)));
175 176 177 178 179 180
    expect(didStartDrag, isTrue);
    didStartDrag = false;
    expect(updatedDelta, 10.0);
    updatedDelta = null;
    expect(didEndDrag, isFalse);

181
    tester.route(pointer.move(const Offset(20.0, 25.0)));
182 183 184 185 186 187 188 189 190 191 192
    expect(didStartDrag, isFalse);
    expect(updatedDelta, 0.0);
    updatedDelta = null;
    expect(didEndDrag, isFalse);

    tester.route(pointer.up());
    expect(didStartDrag, isFalse);
    expect(updatedDelta, isNull);
    expect(didEndDrag, isTrue);
    didEndDrag = false;
  });
193

194
  testGesture('Should report original timestamps', (GestureTester tester) {
195
    final HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
196
    addTearDown(drag.dispose);
197 198 199 200 201 202 203 204 205 206 207

    Duration startTimestamp;
    drag.onStart = (DragStartDetails details) {
      startTimestamp = details.sourceTimeStamp;
    };

    Duration updatedTimestamp;
    drag.onUpdate = (DragUpdateDetails details) {
      updatedTimestamp = details.sourceTimeStamp;
    };

208
    final TestPointer pointer = TestPointer(5);
209 210 211 212 213 214 215 216 217 218 219 220 221 222 223
    final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0), timeStamp: const Duration(milliseconds: 100));
    drag.addPointer(down);
    tester.closeArena(5);
    expect(startTimestamp, isNull);

    tester.route(down);
    expect(startTimestamp, const Duration(milliseconds: 100));

    tester.route(pointer.move(const Offset(20.0, 25.0), timeStamp: const Duration(milliseconds: 200)));
    expect(updatedTimestamp, const Duration(milliseconds: 200));

    tester.route(pointer.move(const Offset(20.0, 25.0), timeStamp: const Duration(milliseconds: 300)));
    expect(updatedTimestamp, const Duration(milliseconds: 300));
  });

224
  testGesture('Should report initial down point to onStart with a down configuration', (GestureTester tester) {
225
    HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer()
226
      ..dragStartBehavior = DragStartBehavior.down;
227
    VerticalDragGestureRecognizer competingDrag = VerticalDragGestureRecognizer()
228 229
      ..dragStartBehavior = DragStartBehavior.down
      ..onStart = (_) {};
230 231
    addTearDown(() => drag?.dispose);
    addTearDown(() => competingDrag?.dispose);
232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252

    Offset positionAtOnStart;
    drag.onStart = (DragStartDetails details) {
      positionAtOnStart = details.globalPosition;
    };
    Offset updateOffset;
    Offset updateDelta;
    drag.onUpdate = (DragUpdateDetails details) {
      updateOffset = details.globalPosition;
      updateDelta = details.delta;
    };

    final TestPointer pointer = TestPointer(5);
    final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
    drag.addPointer(down);
    competingDrag.addPointer(down);
    tester.closeArena(5);
    tester.route(down);

    tester.route(pointer.move(const Offset(30.0, 0.0)));
    drag.dispose();
253
    drag = null;
254
    competingDrag.dispose();
255
    competingDrag = null;
256 257 258 259 260 261 262 263 264 265

    expect(positionAtOnStart, const Offset(10.0, 10.0));

    // The drag is horizontal so we're going to ignore the vertical delta position
    // when calculating the new global position.
    expect(updateOffset, const Offset(30.0, 10.0));
    expect(updateDelta, const Offset(20.0, 0.0));
  });

  testGesture('Drag with multiple pointers in down behavior', (GestureTester tester) {
266
    HorizontalDragGestureRecognizer drag1 =
267
    HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
268
    VerticalDragGestureRecognizer drag2 =
269
    VerticalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
270 271
    addTearDown(() => drag1?.dispose);
    addTearDown(() => drag2?.dispose);
272 273 274 275 276 277 278 279 280 281 282 283 284

    final List<String> log = <String>[];
    drag1.onDown = (_) { log.add('drag1-down'); };
    drag1.onStart = (_) { log.add('drag1-start'); };
    drag1.onUpdate = (_) { log.add('drag1-update'); };
    drag1.onEnd = (_) { log.add('drag1-end'); };
    drag1.onCancel = () { log.add('drag1-cancel'); };
    drag2.onDown = (_) { log.add('drag2-down'); };
    drag2.onStart = (_) { log.add('drag2-start'); };
    drag2.onUpdate = (_) { log.add('drag2-update'); };
    drag2.onEnd = (_) { log.add('drag2-end'); };
    drag2.onCancel = () { log.add('drag2-cancel'); };

285
    final TestPointer pointer5 = TestPointer(5);
286 287 288 289 290 291 292 293 294 295 296 297
    final PointerDownEvent down5 = pointer5.down(const Offset(10.0, 10.0));
    drag1.addPointer(down5);
    drag2.addPointer(down5);
    tester.closeArena(5);
    tester.route(down5);
    log.add('-a');

    tester.route(pointer5.move(const Offset(100.0, 0.0)));
    log.add('-b');
    tester.route(pointer5.move(const Offset(50.0, 50.0)));
    log.add('-c');

298
    final TestPointer pointer6 = TestPointer(6);
299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314
    final PointerDownEvent down6 = pointer6.down(const Offset(20.0, 20.0));
    drag1.addPointer(down6);
    drag2.addPointer(down6);
    tester.closeArena(6);
    tester.route(down6);
    log.add('-d');

    tester.route(pointer5.move(const Offset(0.0, 100.0)));
    log.add('-e');
    tester.route(pointer5.move(const Offset(70.0, 70.0)));
    log.add('-f');

    tester.route(pointer5.up());
    tester.route(pointer6.up());

    drag1.dispose();
315
    drag1 = null;
316
    drag2.dispose();
317
    drag2 = null;
318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335

    expect(log, <String>[
      'drag1-down',
      'drag2-down',
      '-a',
      'drag2-cancel',
      'drag1-start',
      'drag1-update',
      '-b',
      'drag1-update',
      '-c',
      'drag2-down',
      'drag2-cancel',
      '-d',
      'drag1-update',
      '-e',
      'drag1-update',
      '-f',
336
      'drag1-end',
337 338 339
    ]);
  });

340
  testGesture('Clamp max velocity', (GestureTester tester) {
341
    final HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
342
    addTearDown(drag.dispose);
343 344

    Velocity velocity;
345
    double primaryVelocity;
346 347
    drag.onEnd = (DragEndDetails details) {
      velocity = details.velocity;
348
      primaryVelocity = details.primaryVelocity;
349 350
    };

351
    final TestPointer pointer = TestPointer(5);
352
    final PointerDownEvent down = pointer.down(const Offset(10.0, 25.0), timeStamp: const Duration(milliseconds: 10));
353 354 355
    drag.addPointer(down);
    tester.closeArena(5);
    tester.route(down);
356 357 358 359 360 361 362 363 364 365 366
    tester.route(pointer.move(const Offset(20.0, 25.0), timeStamp: const Duration(milliseconds: 10)));
    tester.route(pointer.move(const Offset(30.0, 25.0), timeStamp: const Duration(milliseconds: 11)));
    tester.route(pointer.move(const Offset(40.0, 25.0), timeStamp: const Duration(milliseconds: 12)));
    tester.route(pointer.move(const Offset(50.0, 25.0), timeStamp: const Duration(milliseconds: 13)));
    tester.route(pointer.move(const Offset(60.0, 25.0), timeStamp: const Duration(milliseconds: 14)));
    tester.route(pointer.move(const Offset(70.0, 25.0), timeStamp: const Duration(milliseconds: 15)));
    tester.route(pointer.move(const Offset(80.0, 25.0), timeStamp: const Duration(milliseconds: 16)));
    tester.route(pointer.move(const Offset(90.0, 25.0), timeStamp: const Duration(milliseconds: 17)));
    tester.route(pointer.move(const Offset(100.0, 25.0), timeStamp: const Duration(milliseconds: 18)));
    tester.route(pointer.move(const Offset(110.0, 25.0), timeStamp: const Duration(milliseconds: 19)));
    tester.route(pointer.move(const Offset(120.0, 25.0), timeStamp: const Duration(milliseconds: 20)));
367 368
    tester.route(pointer.up(timeStamp: const Duration(milliseconds: 20)));
    expect(velocity.pixelsPerSecond.dx, inInclusiveRange(0.99 * kMaxFlingVelocity, kMaxFlingVelocity));
369 370
    expect(velocity.pixelsPerSecond.dy, moreOrLessEquals(0.0));
    expect(primaryVelocity, velocity.pixelsPerSecond.dx);
371
  });
372

373
  testGesture('Synthesized pointer events are ignored for velocity tracking', (GestureTester tester) {
374
    final HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
375
    addTearDown(drag.dispose);
376 377 378 379 380 381

    Velocity velocity;
    drag.onEnd = (DragEndDetails details) {
      velocity = details.velocity;
    };

382
    final TestPointer pointer = TestPointer(1);
383 384 385 386 387 388 389 390
    final PointerDownEvent down = pointer.down(const Offset(10.0, 25.0), timeStamp: const Duration(milliseconds: 10));
    drag.addPointer(down);
    tester.closeArena(1);
    tester.route(down);
    tester.route(pointer.move(const Offset(20.0, 25.0), timeStamp: const Duration(milliseconds: 20)));
    tester.route(pointer.move(const Offset(30.0, 25.0), timeStamp: const Duration(milliseconds: 30)));
    tester.route(pointer.move(const Offset(40.0, 25.0), timeStamp: const Duration(milliseconds: 40)));
    tester.route(pointer.move(const Offset(50.0, 25.0), timeStamp: const Duration(milliseconds: 50)));
391
    tester.route(const PointerMoveEvent(
392 393 394
      pointer: 1,
      // Simulate a small synthesized wobble which would have slowed down the
      // horizontal velocity from 1 px/ms and introduced a slight vertical velocity.
395 396
      position: Offset(51.0, 26.0),
      timeStamp: Duration(milliseconds: 60),
397 398
      synthesized: true,
    ));
399 400 401 402 403 404 405 406
    tester.route(pointer.up(timeStamp: const Duration(milliseconds: 70)));
    expect(velocity.pixelsPerSecond.dx, moreOrLessEquals(1000.0));
    expect(velocity.pixelsPerSecond.dy, moreOrLessEquals(0.0));
  });

  /// Checks that quick flick gestures with 1 down, 2 move and 1 up pointer
  /// events still have a velocity
  testGesture('Quick flicks have velocity', (GestureTester tester) {
407
    final HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
408
    addTearDown(drag.dispose);
409 410 411 412 413 414

    Velocity velocity;
    drag.onEnd = (DragEndDetails details) {
      velocity = details.velocity;
    };

415
    final TestPointer pointer = TestPointer(1);
416 417 418 419 420 421 422 423
    final PointerDownEvent down = pointer.down(const Offset(10.0, 25.0), timeStamp: const Duration(milliseconds: 10));
    drag.addPointer(down);
    tester.closeArena(1);
    tester.route(down);
    tester.route(pointer.move(const Offset(20.0, 25.0), timeStamp: const Duration(milliseconds: 20)));
    tester.route(pointer.move(const Offset(30.0, 25.0), timeStamp: const Duration(milliseconds: 30)));
    tester.route(pointer.up(timeStamp: const Duration(milliseconds: 40)));
    // 3 events moving by 10px every 10ms = 1000px/s.
424 425 426 427
    expect(velocity.pixelsPerSecond.dx, moreOrLessEquals(1000.0));
    expect(velocity.pixelsPerSecond.dy, moreOrLessEquals(0.0));
  });

428
  testGesture('Drag details', (GestureTester tester) {
429 430 431 432
    expect(DragDownDetails(), hasOneLineDescription);
    expect(DragStartDetails(), hasOneLineDescription);
    expect(DragUpdateDetails(globalPosition: Offset.zero), hasOneLineDescription);
    expect(DragEndDetails(), hasOneLineDescription);
433
  });
jslavitz's avatar
jslavitz committed
434 435

  testGesture('Should recognize drag', (GestureTester tester) {
436
    final HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
437
    addTearDown(drag.dispose);
jslavitz's avatar
jslavitz committed
438 439 440 441 442 443

    bool didStartDrag = false;
    drag.onStart = (_) {
      didStartDrag = true;
    };

444 445
    Offset updateDelta;
    double updatePrimaryDelta;
jslavitz's avatar
jslavitz committed
446
    drag.onUpdate = (DragUpdateDetails details) {
447 448
      updateDelta = details.delta;
      updatePrimaryDelta = details.primaryDelta;
jslavitz's avatar
jslavitz committed
449 450 451 452 453 454 455
    };

    bool didEndDrag = false;
    drag.onEnd = (DragEndDetails details) {
      didEndDrag = true;
    };

456
    final TestPointer pointer = TestPointer(5);
jslavitz's avatar
jslavitz committed
457 458 459
    final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
    drag.addPointer(down);
    tester.closeArena(5);
460

jslavitz's avatar
jslavitz committed
461
    expect(didStartDrag, isFalse);
462 463
    expect(updateDelta, isNull);
    expect(updatePrimaryDelta, isNull);
jslavitz's avatar
jslavitz committed
464 465 466 467
    expect(didEndDrag, isFalse);

    tester.route(down);
    expect(didStartDrag, isTrue);
468 469
    expect(updateDelta, isNull);
    expect(updatePrimaryDelta, isNull);
jslavitz's avatar
jslavitz committed
470
    expect(didEndDrag, isFalse);
471
    didStartDrag = false;
jslavitz's avatar
jslavitz committed
472 473

    tester.route(pointer.move(const Offset(20.0, 25.0)));
474 475 476
    expect(didStartDrag, isFalse);
    expect(updateDelta, const Offset(10.0, 0.0));
    expect(updatePrimaryDelta, 10.0);
jslavitz's avatar
jslavitz committed
477
    expect(didEndDrag, isFalse);
478 479
    updateDelta = null;
    updatePrimaryDelta = null;
jslavitz's avatar
jslavitz committed
480 481 482

    tester.route(pointer.move(const Offset(20.0, 25.0)));
    expect(didStartDrag, isFalse);
483 484
    expect(updateDelta, const Offset(0.0, 0.0));
    expect(updatePrimaryDelta, 0.0);
jslavitz's avatar
jslavitz committed
485
    expect(didEndDrag, isFalse);
486 487
    updateDelta = null;
    updatePrimaryDelta = null;
jslavitz's avatar
jslavitz committed
488 489 490

    tester.route(pointer.up());
    expect(didStartDrag, isFalse);
491 492
    expect(updateDelta, isNull);
    expect(updatePrimaryDelta, isNull);
jslavitz's avatar
jslavitz committed
493 494 495 496 497
    expect(didEndDrag, isTrue);
    didEndDrag = false;
  });

  testGesture('Should recognize drag', (GestureTester tester) {
498
    final HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
499
    addTearDown(drag.dispose);
jslavitz's avatar
jslavitz committed
500

501 502 503 504 505
    Offset latestGlobalPosition;
    drag.onStart = (DragStartDetails details) {
      latestGlobalPosition = details.globalPosition;
    };
    Offset latestDelta;
jslavitz's avatar
jslavitz committed
506
    drag.onUpdate = (DragUpdateDetails details) {
507 508
      latestGlobalPosition = details.globalPosition;
      latestDelta = details.delta;
jslavitz's avatar
jslavitz committed
509 510
    };

511
    final TestPointer pointer = TestPointer(5);
jslavitz's avatar
jslavitz committed
512 513 514
    final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
    drag.addPointer(down);
    tester.closeArena(5);
515

jslavitz's avatar
jslavitz committed
516
    tester.route(down);
517 518 519 520 521 522 523 524 525 526 527
    expect(latestGlobalPosition, const Offset(10.0, 10.0));
    expect(latestDelta, isNull);

    tester.route(pointer.move(const Offset(20.0, 25.0)));
    expect(latestGlobalPosition, const Offset(20.0, 25.0));
    expect(latestDelta, const Offset(10.0, 0.0));

    tester.route(pointer.move(const Offset(0.0, 45.0)));
    expect(latestGlobalPosition, const Offset(0.0, 45.0));
    expect(latestDelta, const Offset(-20.0, 0.0));

jslavitz's avatar
jslavitz committed
528 529
    tester.route(pointer.up());
  });
530 531 532 533 534 535 536

  testGesture('Can filter drags based on device kind', (GestureTester tester) {
    final HorizontalDragGestureRecognizer drag =
        HorizontalDragGestureRecognizer(
            kind: PointerDeviceKind.mouse,
        )
        ..dragStartBehavior = DragStartBehavior.down;
537
    addTearDown(drag.dispose);
538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607

    bool didStartDrag = false;
    drag.onStart = (_) {
      didStartDrag = true;
    };

    double updatedDelta;
    drag.onUpdate = (DragUpdateDetails details) {
      updatedDelta = details.primaryDelta;
    };

    bool didEndDrag = false;
    drag.onEnd = (DragEndDetails details) {
      didEndDrag = true;
    };

    // Using a touch pointer to drag shouldn't be recognized.
    final TestPointer touchPointer = TestPointer(5, PointerDeviceKind.touch);
    final PointerDownEvent touchDown = touchPointer.down(const Offset(10.0, 10.0));
    drag.addPointer(touchDown);
    tester.closeArena(5);
    expect(didStartDrag, isFalse);
    expect(updatedDelta, isNull);
    expect(didEndDrag, isFalse);

    tester.route(touchDown);
    // Still doesn't recognize the drag because it's coming from a touch pointer.
    expect(didStartDrag, isFalse);
    expect(updatedDelta, isNull);
    expect(didEndDrag, isFalse);

    tester.route(touchPointer.move(const Offset(20.0, 25.0)));
    // Still doesn't recognize the drag because it's coming from a touch pointer.
    expect(didStartDrag, isFalse);
    expect(updatedDelta, isNull);
    expect(didEndDrag, isFalse);

    tester.route(touchPointer.up());
    // Still doesn't recognize the drag because it's coming from a touch pointer.
    expect(didStartDrag, isFalse);
    expect(updatedDelta, isNull);
    expect(didEndDrag, isFalse);

    // Using a mouse pointer to drag should be recognized.
    final TestPointer mousePointer = TestPointer(5, PointerDeviceKind.mouse);
    final PointerDownEvent mouseDown = mousePointer.down(const Offset(10.0, 10.0));
    drag.addPointer(mouseDown);
    tester.closeArena(5);
    expect(didStartDrag, isFalse);
    expect(updatedDelta, isNull);
    expect(didEndDrag, isFalse);

    tester.route(mouseDown);
    expect(didStartDrag, isTrue);
    didStartDrag = false;
    expect(updatedDelta, isNull);
    expect(didEndDrag, isFalse);

    tester.route(mousePointer.move(const Offset(20.0, 25.0)));
    expect(didStartDrag, isFalse);
    expect(updatedDelta, 10.0);
    updatedDelta = null;
    expect(didEndDrag, isFalse);

    tester.route(mousePointer.up());
    expect(didStartDrag, isFalse);
    expect(updatedDelta, isNull);
    expect(didEndDrag, isTrue);
    didEndDrag = false;
  });
608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775

  group('Enforce consistent-button restriction:', () {
    PanGestureRecognizer pan;
    TapGestureRecognizer tap;
    final List<String> logs = <String>[];

    setUp(() {
      tap = TapGestureRecognizer()
        ..onTap = () {}; // Need a callback to enable competition
      pan = PanGestureRecognizer()
        ..onStart = (DragStartDetails details) {
          logs.add('start');
        }
        ..onDown = (DragDownDetails details) {
          logs.add('down');
        }
        ..onUpdate = (DragUpdateDetails details) {
          logs.add('update');
        }
        ..onCancel = () {
          logs.add('cancel');
        }
        ..onEnd = (DragEndDetails details) {
          logs.add('end');
        };
    });

    tearDown(() {
      pan.dispose();
      tap.dispose();
      logs.clear();
    });

    testGesture('Button change before acceptance should lead to immediate cancel', (GestureTester tester) {
      final TestPointer pointer = TestPointer(5, PointerDeviceKind.mouse, kPrimaryButton);
      final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
      pan.addPointer(down);
      tap.addPointer(down);
      tester.closeArena(5);

      tester.route(down);
      expect(logs, <String>['down']);
      // Move out of slop so make sure button changes takes priority over slops
      tester.route(pointer.move(const Offset(30.0, 30.0), buttons: kSecondaryButton));
      expect(logs, <String>['down', 'cancel']);

      tester.route(pointer.up());
    });

    testGesture('Button change before acceptance should not prevent the next drag', (GestureTester tester) {
      { // First drag (which is canceled)
        final TestPointer pointer = TestPointer(5, PointerDeviceKind.mouse, kPrimaryButton);
        final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
        pan.addPointer(down);
        tap.addPointer(down);
        tester.closeArena(down.pointer);

        tester.route(down);
        tester.route(pointer.move(const Offset(10.0, 10.0), buttons: kSecondaryButton));
        tester.route(pointer.up());
        expect(logs, <String>['down', 'cancel']);
      }
      logs.clear();

      final TestPointer pointer2 = TestPointer(6, PointerDeviceKind.mouse, kPrimaryButton);
      final PointerDownEvent down2 = pointer2.down(const Offset(10.0, 10.0));
      pan.addPointer(down2);
      tap.addPointer(down2);
      tester.closeArena(down2.pointer);
      tester.route(down2);
      expect(logs, <String>['down']);

      tester.route(pointer2.move(const Offset(30.0, 30.0)));
      expect(logs, <String>['down', 'start']);

      tester.route(pointer2.up());
      expect(logs, <String>['down', 'start', 'end']);
    });

    testGesture('Button change after acceptance should lead to immediate end', (GestureTester tester) {
      final TestPointer pointer = TestPointer(5, PointerDeviceKind.mouse, kPrimaryButton);
      final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
      pan.addPointer(down);
      tap.addPointer(down);
      tester.closeArena(down.pointer);

      tester.route(down);
      expect(logs, <String>['down']);
      tester.route(pointer.move(const Offset(30.0, 30.0)));
      expect(logs, <String>['down', 'start']);
      tester.route(pointer.move(const Offset(30.0, 30.0), buttons: kSecondaryButton));
      expect(logs, <String>['down', 'start', 'end']);

      // Make sure no further updates are sent
      tester.route(pointer.move(const Offset(50.0, 50.0)));
      expect(logs, <String>['down', 'start', 'end']);

      tester.route(pointer.up());
    });

    testGesture('Button change after acceptance should not prevent the next drag', (GestureTester tester) {
      { // First drag (which is canceled)
        final TestPointer pointer = TestPointer(5, PointerDeviceKind.mouse, kPrimaryButton);
        final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
        pan.addPointer(down);
        tap.addPointer(down);
        tester.closeArena(down.pointer);

        tester.route(down);

        tester.route(pointer.move(const Offset(30.0, 30.0)));

        tester.route(pointer.move(const Offset(30.0, 31.0), buttons: kSecondaryButton));
        tester.route(pointer.up());
        expect(logs, <String>['down', 'start', 'end']);
      }
      logs.clear();

      final TestPointer pointer2 = TestPointer(6, PointerDeviceKind.mouse, kPrimaryButton);
      final PointerDownEvent down2 = pointer2.down(const Offset(10.0, 10.0));
      pan.addPointer(down2);
      tap.addPointer(down2);
      tester.closeArena(down2.pointer);
      tester.route(down2);
      expect(logs, <String>['down']);

      tester.route(pointer2.move(const Offset(30.0, 30.0)));
      expect(logs, <String>['down', 'start']);

      tester.route(pointer2.up());
      expect(logs, <String>['down', 'start', 'end']);
    });
  });

  group('Recognizers listening on different buttons do not form competition:', () {
    // This test is assisted by tap recognizers. If a tap gesture has
    // no competing recognizers, a pointer down event triggers its onTapDown
    // immediately; if there are competitors, onTapDown is triggered after a
    // timeout.
    // The following tests make sure that drag recognizers do not form
    // competition with a tap gesture recognizer listening on a different button.

    final List<String> recognized = <String>[];
    TapGestureRecognizer tapPrimary;
    TapGestureRecognizer tapSecondary;
    PanGestureRecognizer pan;
    setUp(() {
      tapPrimary = TapGestureRecognizer()
        ..onTapDown = (TapDownDetails details) {
          recognized.add('tapPrimary');
        };
      tapSecondary = TapGestureRecognizer()
        ..onSecondaryTapDown = (TapDownDetails details) {
          recognized.add('tapSecondary');
        };
      pan = PanGestureRecognizer()
        ..onStart = (_) {
          recognized.add('drag');
        };
    });

    tearDown(() {
      recognized.clear();
      tapPrimary.dispose();
      tapSecondary.dispose();
      pan.dispose();
    });

Chris Bracken's avatar
Chris Bracken committed
776
    testGesture('A primary pan recognizer does not form competition with a secondary tap recognizer', (GestureTester tester) {
777 778 779 780 781 782 783 784 785 786 787 788 789 790 791
      final TestPointer pointer = TestPointer(
        1,
        PointerDeviceKind.touch,
        0,
        kSecondaryButton,
      );
      final PointerDownEvent down = pointer.down(const Offset(10, 10));
      pan.addPointer(down);
      tapSecondary.addPointer(down);
      tester.closeArena(down.pointer);

      tester.route(down);
      expect(recognized, <String>['tapSecondary']);
    });

Chris Bracken's avatar
Chris Bracken committed
792
    testGesture('A primary pan recognizer forms competition with a primary tap recognizer', (GestureTester tester) {
793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813
      final TestPointer pointer = TestPointer(
        1,
        PointerDeviceKind.touch,
        kPrimaryButton,
      );
      final PointerDownEvent down = pointer.down(const Offset(10, 10));
      pan.addPointer(down);
      tapPrimary.addPointer(down);
      tester.closeArena(down.pointer);

      tester.route(down);
      expect(recognized, <String>[]);

      tester.route(pointer.up());
      expect(recognized, <String>['tapPrimary']);
    });
  });

  testGesture('A secondary drag should not trigger primary', (GestureTester tester) {
    final List<String> recognized = <String>[];
    final TapGestureRecognizer tap = TapGestureRecognizer()
Chris Bracken's avatar
Chris Bracken committed
814
      ..onTap = () {}; // Need a listener to enable competition.
815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830
    final PanGestureRecognizer pan = PanGestureRecognizer()
      ..onDown = (DragDownDetails details) {
        recognized.add('primaryDown');
      }
      ..onStart = (DragStartDetails details) {
        recognized.add('primaryStart');
      }
      ..onUpdate = (DragUpdateDetails details) {
        recognized.add('primaryUpdate');
      }
      ..onEnd = (DragEndDetails details) {
        recognized.add('primaryEnd');
      }
      ..onCancel = () {
        recognized.add('primaryCancel');
      };
831 832
    addTearDown(pan.dispose);
    addTearDown(tap.dispose);
833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850

    final TestPointer pointer = TestPointer(
      5,
      PointerDeviceKind.touch,
      0,
      kSecondaryButton,
    );

    final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
    pan.addPointer(down);
    tap.addPointer(down);
    tester.closeArena(5);
    tester.route(down);
    tester.route(pointer.move(const Offset(20.0, 30.0)));
    tester.route(pointer.move(const Offset(20.0, 25.0)));
    tester.route(pointer.up());
    expect(recognized, <String>[]);
    recognized.clear();
851
  });
852

853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889
  testGesture('A secondary drag should not trigger primary', (GestureTester tester) {
    final List<String> recognized = <String>[];
    final TapGestureRecognizer tap = TapGestureRecognizer()
      ..onTap = () {}; // Need a listener to enable competition.
    final PanGestureRecognizer pan = PanGestureRecognizer()
      ..onDown = (DragDownDetails details) {
        recognized.add('primaryDown');
      }
      ..onStart = (DragStartDetails details) {
        recognized.add('primaryStart');
      }
      ..onUpdate = (DragUpdateDetails details) {
        recognized.add('primaryUpdate');
      }
      ..onEnd = (DragEndDetails details) {
        recognized.add('primaryEnd');
      }
      ..onCancel = () {
        recognized.add('primaryCancel');
      };

    final TestPointer pointer = TestPointer(
      5,
      PointerDeviceKind.touch,
      0,
      kSecondaryButton,
    );

    final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
    pan.addPointer(down);
    tap.addPointer(down);
    tester.closeArena(5);
    tester.route(down);
    tester.route(pointer.move(const Offset(20.0, 30.0)));
    tester.route(pointer.move(const Offset(20.0, 25.0)));
    tester.route(pointer.up());
    expect(recognized, <String>[]);
890
    recognized.clear();
891 892 893 894 895 896

    addTearDown(pan.dispose);
    addTearDown(tap.dispose);
    recognized.clear();
  });

897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929
  testGesture(
    'On multiple pointers, DragGestureRecognizer is canceled '
    'when all pointers are canceled (FIFO)',
    (GestureTester tester) {
      // This test simulates the following scenario:
      // P1 down, P2 down, P1 up, P2 up
      final List<String> logs = <String>[];
      final HorizontalDragGestureRecognizer hori = HorizontalDragGestureRecognizer()
        ..onDown = (DragDownDetails details) { logs.add('downH'); }
        ..onStart = (DragStartDetails details) { logs.add('startH'); }
        ..onUpdate = (DragUpdateDetails details) { logs.add('updateH'); }
        ..onEnd = (DragEndDetails details) { logs.add('endH'); }
        ..onCancel = () { logs.add('cancelH'); };
      // Competitor
      final TapGestureRecognizer vert = TapGestureRecognizer()
        ..onTapDown = (TapDownDetails details) { logs.add('downT'); }
        ..onTapUp = (TapUpDetails details) { logs.add('upT'); }
        ..onTapCancel = () {};
      addTearDown(hori.dispose);
      addTearDown(vert.dispose);

      final TestPointer pointer1 = TestPointer(4, PointerDeviceKind.touch);
      final TestPointer pointer2 = TestPointer(5, PointerDeviceKind.touch);

      final PointerDownEvent down1 = pointer1.down(const Offset(10.0, 10.0));
      final PointerDownEvent down2 = pointer2.down(const Offset(11.0, 10.0));

      hori.addPointer(down1);
      vert.addPointer(down1);
      tester.route(down1);
      tester.closeArena(pointer1.pointer);
      expect(logs, <String>['downH']);
      logs.clear();
930

931 932 933 934 935 936
      hori.addPointer(down2);
      vert.addPointer(down2);
      tester.route(down2);
      tester.closeArena(pointer2.pointer);
      expect(logs, <String>[]);
      logs.clear();
937

938 939 940 941
      tester.route(pointer1.up());
      GestureBinding.instance.gestureArena.sweep(pointer1.pointer);
      expect(logs, <String>['downT', 'upT']);
      logs.clear();
942

943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982
      tester.route(pointer2.up());
      GestureBinding.instance.gestureArena.sweep(pointer2.pointer);
      expect(logs, <String>['cancelH']);
      logs.clear();
    },
  );

  testGesture(
    'On multiple pointers, DragGestureRecognizer is canceled '
    'when all pointers are canceled (FILO)',
    (GestureTester tester) {
      // This test simulates the following scenario:
      // P1 down, P2 down, P1 up, P2 up
      final List<String> logs = <String>[];
      final HorizontalDragGestureRecognizer hori = HorizontalDragGestureRecognizer()
        ..onDown = (DragDownDetails details) { logs.add('downH'); }
        ..onStart = (DragStartDetails details) { logs.add('startH'); }
        ..onUpdate = (DragUpdateDetails details) { logs.add('updateH'); }
        ..onEnd = (DragEndDetails details) { logs.add('endH'); }
        ..onCancel = () { logs.add('cancelH'); };
      // Competitor
      final TapGestureRecognizer vert = TapGestureRecognizer()
        ..onTapDown = (TapDownDetails details) { logs.add('downT'); }
        ..onTapUp = (TapUpDetails details) { logs.add('upT'); }
        ..onTapCancel = () {};
      addTearDown(hori.dispose);
      addTearDown(vert.dispose);

      final TestPointer pointer1 = TestPointer(4, PointerDeviceKind.touch);
      final TestPointer pointer2 = TestPointer(5, PointerDeviceKind.touch);

      final PointerDownEvent down1 = pointer1.down(const Offset(10.0, 10.0));
      final PointerDownEvent down2 = pointer2.down(const Offset(11.0, 10.0));

      hori.addPointer(down1);
      vert.addPointer(down1);
      tester.route(down1);
      tester.closeArena(pointer1.pointer);
      expect(logs, <String>['downH']);
      logs.clear();
983

984 985 986 987 988 989
      hori.addPointer(down2);
      vert.addPointer(down2);
      tester.route(down2);
      tester.closeArena(pointer2.pointer);
      expect(logs, <String>[]);
      logs.clear();
990

991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172
      tester.route(pointer2.up());
      GestureBinding.instance.gestureArena.sweep(pointer2.pointer);
      // Tap is not triggered because pointer2 is not its primary pointer
      expect(logs, <String>[]);
      logs.clear();

      tester.route(pointer1.up());
      GestureBinding.instance.gestureArena.sweep(pointer1.pointer);
      expect(logs, <String>['cancelH', 'downT', 'upT']);
      logs.clear();
    },
  );

  testGesture(
    'On multiple pointers, DragGestureRecognizer is accepted when the '
    'first pointer is accepted',
    (GestureTester tester) {
      // This test simulates the following scenario:
      // P1 down, P2 down, P1 moves away, P2 up
      final List<String> logs = <String>[];
      final HorizontalDragGestureRecognizer hori = HorizontalDragGestureRecognizer()
        ..onDown = (DragDownDetails details) { logs.add('downH'); }
        ..onStart = (DragStartDetails details) { logs.add('startH'); }
        ..onUpdate = (DragUpdateDetails details) { logs.add('updateH'); }
        ..onEnd = (DragEndDetails details) { logs.add('endH'); }
        ..onCancel = () { logs.add('cancelH'); };
      // Competitor
      final TapGestureRecognizer vert = TapGestureRecognizer()
        ..onTapDown = (TapDownDetails details) { logs.add('downT'); }
        ..onTapUp = (TapUpDetails details) { logs.add('upT'); }
        ..onTapCancel = () {};
      addTearDown(hori.dispose);
      addTearDown(vert.dispose);

      final TestPointer pointer1 = TestPointer(4, PointerDeviceKind.touch);
      final TestPointer pointer2 = TestPointer(5, PointerDeviceKind.touch);

      final PointerDownEvent down1 = pointer1.down(const Offset(10.0, 10.0));
      final PointerDownEvent down2 = pointer2.down(const Offset(11.0, 10.0));

      hori.addPointer(down1);
      vert.addPointer(down1);
      tester.route(down1);
      tester.closeArena(pointer1.pointer);
      expect(logs, <String>['downH']);
      logs.clear();

      hori.addPointer(down2);
      vert.addPointer(down2);
      tester.route(down2);
      tester.closeArena(pointer2.pointer);
      expect(logs, <String>[]);
      logs.clear();

      tester.route(pointer1.move(const Offset(100, 100)));
      expect(logs, <String>['startH']);
      logs.clear();

      tester.route(pointer2.up());
      GestureBinding.instance.gestureArena.sweep(pointer2.pointer);
      expect(logs, <String>[]);
      logs.clear();

      tester.route(pointer1.up());
      GestureBinding.instance.gestureArena.sweep(pointer1.pointer);
      expect(logs, <String>['endH']);
      logs.clear();
    },
  );

  testGesture(
    'On multiple pointers, canceled pointers (due to up) do not '
    'prevent later pointers getting accepted',
    (GestureTester tester) {
      // This test simulates the following scenario:
      // P1 down, P2 down, P1 Up, P2 moves away
      final List<String> logs = <String>[];
      final HorizontalDragGestureRecognizer hori = HorizontalDragGestureRecognizer()
        ..onDown = (DragDownDetails details) { logs.add('downH'); }
        ..onStart = (DragStartDetails details) { logs.add('startH'); }
        ..onUpdate = (DragUpdateDetails details) { logs.add('updateH'); }
        ..onEnd = (DragEndDetails details) { logs.add('endH'); }
        ..onCancel = () { logs.add('cancelH'); };
      // Competitor
      final TapGestureRecognizer vert = TapGestureRecognizer()
        ..onTapDown = (TapDownDetails details) { logs.add('downT'); }
        ..onTapUp = (TapUpDetails details) { logs.add('upT'); }
        ..onTapCancel = () {};
      addTearDown(hori.dispose);
      addTearDown(vert.dispose);

      final TestPointer pointer1 = TestPointer(4, PointerDeviceKind.touch);
      final TestPointer pointer2 = TestPointer(5, PointerDeviceKind.touch);

      final PointerDownEvent down1 = pointer1.down(const Offset(10.0, 10.0));
      final PointerDownEvent down2 = pointer2.down(const Offset(11.0, 10.0));

      hori.addPointer(down1);
      vert.addPointer(down1);
      tester.route(down1);
      tester.closeArena(pointer1.pointer);
      expect(logs, <String>['downH']);
      logs.clear();

      hori.addPointer(down2);
      vert.addPointer(down2);
      tester.route(down2);
      tester.closeArena(pointer2.pointer);
      expect(logs, <String>[]);
      logs.clear();

      tester.route(pointer1.up());
      GestureBinding.instance.gestureArena.sweep(pointer1.pointer);
      expect(logs, <String>['downT', 'upT']);
      logs.clear();

      tester.route(pointer2.move(const Offset(100, 100)));
      expect(logs, <String>['startH']);
      logs.clear();

      tester.route(pointer2.up());
      GestureBinding.instance.gestureArena.sweep(pointer2.pointer);
      expect(logs, <String>['endH']);
      logs.clear();
    },
  );

  testGesture(
    'On multiple pointers, canceled pointers (due to buttons) do not '
    'prevent later pointers getting accepted',
    (GestureTester tester) {
      // This test simulates the following scenario:
      // P1 down, P2 down, P1 change buttons, P2 moves away
      final List<String> logs = <String>[];
      final HorizontalDragGestureRecognizer hori = HorizontalDragGestureRecognizer()
        ..onDown = (DragDownDetails details) { logs.add('downH'); }
        ..onStart = (DragStartDetails details) { logs.add('startH'); }
        ..onUpdate = (DragUpdateDetails details) { logs.add('updateH'); }
        ..onEnd = (DragEndDetails details) { logs.add('endH'); }
        ..onCancel = () { logs.add('cancelH'); };
      // Competitor
      final TapGestureRecognizer vert = TapGestureRecognizer()
        ..onTapDown = (TapDownDetails details) { logs.add('downT'); }
        ..onTapUp = (TapUpDetails details) { logs.add('upT'); }
        ..onTapCancel = () {};
      addTearDown(hori.dispose);
      addTearDown(vert.dispose);

      final TestPointer pointer1 = TestPointer(1, PointerDeviceKind.touch);
      final TestPointer pointer2 = TestPointer(2, PointerDeviceKind.touch);

      final PointerDownEvent down1 = pointer1.down(const Offset(10.0, 10.0));
      final PointerDownEvent down2 = pointer2.down(const Offset(11.0, 10.0));

      hori.addPointer(down1);
      vert.addPointer(down1);
      tester.route(down1);
      tester.closeArena(pointer1.pointer);

      hori.addPointer(down2);
      vert.addPointer(down2);
      tester.route(down2);
      tester.closeArena(pointer2.pointer);
      expect(logs, <String>['downH']);
      logs.clear();

      // Pointer 1 changes buttons, which cancel tap, leaving drag the only
      // remaining member of arena 1, therefore drag is accepted.
      tester.route(pointer1.move(const Offset(9.9, 9.9), buttons: kSecondaryButton));
      expect(logs, <String>['startH']);
      logs.clear();

      tester.route(pointer2.move(const Offset(100, 100)));
      expect(logs, <String>['updateH']);
      logs.clear();

      tester.route(pointer2.up());
      GestureBinding.instance.gestureArena.sweep(pointer2.pointer);
      expect(logs, <String>['endH']);
      logs.clear();
    },
  );
1173
}