scrollable_test.dart 28.9 KB
Newer Older
Ian Hickson's avatar
Ian Hickson committed
1
// Copyright 2014 The Flutter Authors. All rights reserved.
2 3 4
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

5 6
import 'dart:ui' as ui;

7 8
import 'package:flutter/foundation.dart';
import 'package:flutter/services.dart';
9 10 11 12
import 'package:flutter_test/flutter_test.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';

13 14 15 16 17
Future<void> pumpTest(
  WidgetTester tester,
  TargetPlatform platform, {
  bool scrollable = true,
  bool reverse = false,
18
  ScrollController controller,
19
}) async {
20 21
  await tester.pumpWidget(MaterialApp(
    theme: ThemeData(
22 23
      platform: platform,
    ),
24
    home: CustomScrollView(
25
      controller: controller,
26
      reverse: reverse,
27 28
      physics: scrollable ? null : const NeverScrollableScrollPhysics(),
      slivers: const <Widget>[
29
        SliverToBoxAdapter(child: SizedBox(height: 2000.0)),
30 31 32 33 34 35 36 37
      ],
    ),
  ));
  await tester.pump(const Duration(seconds: 5)); // to let the theme animate
}

const double dragOffset = 200.0;

38
final LogicalKeyboardKey modifierKey = defaultTargetPlatform == TargetPlatform.macOS
39 40 41
    ? LogicalKeyboardKey.metaLeft
    : LogicalKeyboardKey.controlLeft;

42
double getScrollOffset(WidgetTester tester) {
43
  final RenderViewport viewport = tester.renderObject(find.byType(Viewport));
44 45 46
  return viewport.offset.pixels;
}

47 48
double getScrollVelocity(WidgetTester tester) {
  final RenderViewport viewport = tester.renderObject(find.byType(Viewport));
49
  final ScrollPosition position = viewport.offset as ScrollPosition;
50
  return position.activity.velocity;
51 52
}

53
void resetScrollOffset(WidgetTester tester) {
54
  final RenderViewport viewport = tester.renderObject(find.byType(Viewport));
55
  final ScrollPosition position = viewport.offset as ScrollPosition;
56 57 58 59 60 61
  position.jumpTo(0.0);
}

void main() {
  testWidgets('Flings on different platforms', (WidgetTester tester) async {
    await pumpTest(tester, TargetPlatform.android);
Adam Barth's avatar
Adam Barth committed
62
    await tester.fling(find.byType(Viewport), const Offset(0.0, -dragOffset), 1000.0);
63 64 65 66 67 68 69 70 71
    expect(getScrollOffset(tester), dragOffset);
    await tester.pump(); // trigger fling
    expect(getScrollOffset(tester), dragOffset);
    await tester.pump(const Duration(seconds: 5));
    final double result1 = getScrollOffset(tester);

    resetScrollOffset(tester);

    await pumpTest(tester, TargetPlatform.iOS);
Adam Barth's avatar
Adam Barth committed
72
    await tester.fling(find.byType(Viewport), const Offset(0.0, -dragOffset), 1000.0);
73 74
    // Scroll starts ease into the scroll on iOS.
    expect(getScrollOffset(tester), moreOrLessEquals(197.16666666666669));
75
    await tester.pump(); // trigger fling
76
    expect(getScrollOffset(tester), moreOrLessEquals(197.16666666666669));
77 78 79 80 81 82
    await tester.pump(const Duration(seconds: 5));
    final double result2 = getScrollOffset(tester);

    expect(result1, lessThan(result2)); // iOS (result2) is slipperier than Android (result1)
  });

83 84
  testWidgets('Holding scroll', (WidgetTester tester) async {
    await pumpTest(tester, TargetPlatform.iOS);
85
    await tester.drag(find.byType(Viewport), const Offset(0.0, 200.0), touchSlopY: 0.0);
86 87 88 89 90
    expect(getScrollOffset(tester), -200.0);
    await tester.pump(); // trigger ballistic
    await tester.pump(const Duration(milliseconds: 10));
    expect(getScrollOffset(tester), greaterThan(-200.0));
    expect(getScrollOffset(tester), lessThan(0.0));
91 92
    final double heldPosition = getScrollOffset(tester);
    // Hold and let go while in overscroll.
93 94
    final TestGesture gesture = await tester.startGesture(tester.getCenter(find.byType(Viewport)));
    expect(await tester.pumpAndSettle(), 1);
95
    expect(getScrollOffset(tester), heldPosition);
96
    await gesture.up();
97
    // Once the hold is let go, it should still snap back to origin.
98 99 100 101 102
    expect(await tester.pumpAndSettle(const Duration(minutes: 1)), 2);
    expect(getScrollOffset(tester), 0.0);
  });

  testWidgets('Repeated flings builds momentum on iOS', (WidgetTester tester) async {
103
    await pumpTest(tester, TargetPlatform.iOS);
Adam Barth's avatar
Adam Barth committed
104
    await tester.fling(find.byType(Viewport), const Offset(0.0, -dragOffset), 1000.0);
105
    await tester.pump(); // trigger fling
106 107 108 109 110 111 112
    await tester.pump(const Duration(milliseconds: 10));
    // Repeat the exact same motion.
    await tester.fling(find.byType(Viewport), const Offset(0.0, -dragOffset), 1000.0);
    await tester.pump();
    // On iOS, the velocity will be larger than the velocity of the last fling by a
    // non-trivial amount.
    expect(getScrollVelocity(tester), greaterThan(1100.0));
113 114 115 116

    resetScrollOffset(tester);

    await pumpTest(tester, TargetPlatform.android);
Adam Barth's avatar
Adam Barth committed
117
    await tester.fling(find.byType(Viewport), const Offset(0.0, -dragOffset), 1000.0);
118
    await tester.pump(); // trigger fling
119 120 121 122 123 124 125 126
    await tester.pump(const Duration(milliseconds: 10));
    // Repeat the exact same motion.
    await tester.fling(find.byType(Viewport), const Offset(0.0, -dragOffset), 1000.0);
    await tester.pump();
    // On Android, there is no momentum build. The final velocity is the same as the
    // velocity of the last fling.
    expect(getScrollVelocity(tester), moreOrLessEquals(1000.0));
  });
127

128 129 130 131 132 133 134 135 136 137 138 139
  testWidgets('No iOS momentum build with flings in opposite directions', (WidgetTester tester) async {
    await pumpTest(tester, TargetPlatform.iOS);
    await tester.fling(find.byType(Viewport), const Offset(0.0, -dragOffset), 1000.0);
    await tester.pump(); // trigger fling
    await tester.pump(const Duration(milliseconds: 10));
    // Repeat the exact same motion in the opposite direction.
    await tester.fling(find.byType(Viewport), const Offset(0.0, dragOffset), 1000.0);
    await tester.pump();
    // The only applied velocity to the scrollable is the second fling that was in the
    // opposite direction.
    expect(getScrollVelocity(tester), greaterThan(-1000.0));
    expect(getScrollVelocity(tester), lessThan(0.0));
140
  });
141

142
  testWidgets('No iOS momentum kept on hold gestures', (WidgetTester tester) async {
143
    await pumpTest(tester, TargetPlatform.iOS);
144 145
    await tester.fling(find.byType(Viewport), const Offset(0.0, -dragOffset), 1000.0);
    await tester.pump(); // trigger fling
146
    await tester.pump(const Duration(milliseconds: 10));
147
    expect(getScrollVelocity(tester), greaterThan(0.0));
148
    final TestGesture gesture = await tester.startGesture(tester.getCenter(find.byType(Viewport)));
149
    await tester.pump(const Duration(milliseconds: 40));
150
    await gesture.up();
151 152
    // After a hold longer than 2 frames, previous velocity is lost.
    expect(getScrollVelocity(tester), 0.0);
153
  });
154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188

  testWidgets('Drags creeping unaffected on Android', (WidgetTester tester) async {
    await pumpTest(tester, TargetPlatform.android);
    final TestGesture gesture = await tester.startGesture(tester.getCenter(find.byType(Viewport)));
    await gesture.moveBy(const Offset(0.0, -0.5));
    expect(getScrollOffset(tester), 0.5);
    await gesture.moveBy(const Offset(0.0, -0.5), timeStamp: const Duration(milliseconds: 10));
    expect(getScrollOffset(tester), 1.0);
    await gesture.moveBy(const Offset(0.0, -0.5), timeStamp: const Duration(milliseconds: 20));
    expect(getScrollOffset(tester), 1.5);
  });

  testWidgets('Drags creeping must break threshold on iOS', (WidgetTester tester) async {
    await pumpTest(tester, TargetPlatform.iOS);
    final TestGesture gesture = await tester.startGesture(tester.getCenter(find.byType(Viewport)));
    await gesture.moveBy(const Offset(0.0, -0.5));
    expect(getScrollOffset(tester), 0.0);
    await gesture.moveBy(const Offset(0.0, -0.5), timeStamp: const Duration(milliseconds: 10));
    expect(getScrollOffset(tester), 0.0);
    await gesture.moveBy(const Offset(0.0, -0.5), timeStamp: const Duration(milliseconds: 20));
    expect(getScrollOffset(tester), 0.0);
    await gesture.moveBy(const Offset(0.0, -1.0), timeStamp: const Duration(milliseconds: 30));
    // Now -2.5 in total.
    expect(getScrollOffset(tester), 0.0);
    await gesture.moveBy(const Offset(0.0, -1.0), timeStamp: const Duration(milliseconds: 40));
    // Now -3.5, just reached threshold.
    expect(getScrollOffset(tester), 0.0);
    await gesture.moveBy(const Offset(0.0, -0.5), timeStamp: const Duration(milliseconds: 50));
    // -0.5 over threshold transferred.
    expect(getScrollOffset(tester), 0.5);
  });

  testWidgets('Big drag over threshold magnitude preserved on iOS', (WidgetTester tester) async {
    await pumpTest(tester, TargetPlatform.iOS);
    final TestGesture gesture = await tester.startGesture(tester.getCenter(find.byType(Viewport)));
189
    await gesture.moveBy(const Offset(0.0, -30.0));
190
    // No offset lost from threshold.
191 192 193 194 195 196 197 198 199 200 201 202
    expect(getScrollOffset(tester), 30.0);
  });

  testWidgets('Slow threshold breaks are attenuated on iOS', (WidgetTester tester) async {
    await pumpTest(tester, TargetPlatform.iOS);
    final TestGesture gesture = await tester.startGesture(tester.getCenter(find.byType(Viewport)));
    // This is a typical 'hesitant' iOS scroll start.
    await gesture.moveBy(const Offset(0.0, -10.0));
    expect(getScrollOffset(tester), moreOrLessEquals(1.1666666666666667));
    await gesture.moveBy(const Offset(0.0, -10.0), timeStamp: const Duration(milliseconds: 20));
    // Subsequent motions unaffected.
    expect(getScrollOffset(tester), moreOrLessEquals(11.16666666666666673));
203 204 205 206 207
  });

  testWidgets('Small continuing motion preserved on iOS', (WidgetTester tester) async {
    await pumpTest(tester, TargetPlatform.iOS);
    final TestGesture gesture = await tester.startGesture(tester.getCenter(find.byType(Viewport)));
208 209
    await gesture.moveBy(const Offset(0.0, -30.0)); // Break threshold.
    expect(getScrollOffset(tester), 30.0);
210
    await gesture.moveBy(const Offset(0.0, -0.5), timeStamp: const Duration(milliseconds: 20));
211
    expect(getScrollOffset(tester), 30.5);
212
    await gesture.moveBy(const Offset(0.0, -0.5), timeStamp: const Duration(milliseconds: 40));
213
    expect(getScrollOffset(tester), 31.0);
214
    await gesture.moveBy(const Offset(0.0, -0.5), timeStamp: const Duration(milliseconds: 60));
215
    expect(getScrollOffset(tester), 31.5);
216 217 218 219 220
  });

  testWidgets('Motion stop resets threshold on iOS', (WidgetTester tester) async {
    await pumpTest(tester, TargetPlatform.iOS);
    final TestGesture gesture = await tester.startGesture(tester.getCenter(find.byType(Viewport)));
221 222
    await gesture.moveBy(const Offset(0.0, -30.0)); // Break threshold.
    expect(getScrollOffset(tester), 30.0);
223
    await gesture.moveBy(const Offset(0.0, -0.5), timeStamp: const Duration(milliseconds: 20));
224
    expect(getScrollOffset(tester), 30.5);
225 226 227 228
    await gesture.moveBy(Offset.zero);
    // Stationary too long, threshold reset.
    await gesture.moveBy(Offset.zero, timeStamp: const Duration(milliseconds: 120));
    await gesture.moveBy(const Offset(0.0, -1.0), timeStamp: const Duration(milliseconds: 140));
229
    expect(getScrollOffset(tester), 30.5);
230
    await gesture.moveBy(const Offset(0.0, -1.0), timeStamp: const Duration(milliseconds: 150));
231
    expect(getScrollOffset(tester), 30.5);
232
    await gesture.moveBy(const Offset(0.0, -1.0), timeStamp: const Duration(milliseconds: 160));
233
    expect(getScrollOffset(tester), 30.5);
234 235
    await gesture.moveBy(const Offset(0.0, -1.0), timeStamp: const Duration(milliseconds: 170));
    // New threshold broken.
236
    expect(getScrollOffset(tester), 31.5);
237
    await gesture.moveBy(const Offset(0.0, -1.0), timeStamp: const Duration(milliseconds: 180));
238
    expect(getScrollOffset(tester), 32.5);
239
  });
240 241 242 243 244 245 246 247 248 249 250 251 252 253

  testWidgets('Scroll pointer signals are handled', (WidgetTester tester) async {
    await pumpTest(tester, TargetPlatform.fuchsia);
    final Offset scrollEventLocation = tester.getCenter(find.byType(Viewport));
    final TestPointer testPointer = TestPointer(1, ui.PointerDeviceKind.mouse);
    // Create a hover event so that |testPointer| has a location when generating the scroll.
    testPointer.hover(scrollEventLocation);
    final HitTestResult result = tester.hitTestOnBinding(scrollEventLocation);
    await tester.sendEventToBinding(testPointer.scroll(const Offset(0.0, 20.0)), result);
    expect(getScrollOffset(tester), 20.0);
    // Pointer signals should not cause overscroll.
    await tester.sendEventToBinding(testPointer.scroll(const Offset(0.0, -30.0)), result);
    expect(getScrollOffset(tester), 0.0);
  });
254 255 256 257 258 259 260 261 262 263 264

  testWidgets('Scroll pointer signals are ignored when scrolling is disabled', (WidgetTester tester) async {
    await pumpTest(tester, TargetPlatform.fuchsia, scrollable: false);
    final Offset scrollEventLocation = tester.getCenter(find.byType(Viewport));
    final TestPointer testPointer = TestPointer(1, ui.PointerDeviceKind.mouse);
    // Create a hover event so that |testPointer| has a location when generating the scroll.
    testPointer.hover(scrollEventLocation);
    final HitTestResult result = tester.hitTestOnBinding(scrollEventLocation);
    await tester.sendEventToBinding(testPointer.scroll(const Offset(0.0, 20.0)), result);
    expect(getScrollOffset(tester), 0.0);
  });
265 266 267 268 269 270 271 272 273 274 275 276 277

  testWidgets('Scrolls in correct direction when scroll axis is reversed', (WidgetTester tester) async {
    await pumpTest(tester, TargetPlatform.fuchsia, reverse: true);

    final Offset scrollEventLocation = tester.getCenter(find.byType(Viewport));
    final TestPointer testPointer = TestPointer(1, ui.PointerDeviceKind.mouse);
    // Create a hover event so that |testPointer| has a location when generating the scroll.
    testPointer.hover(scrollEventLocation);
    final HitTestResult result = tester.hitTestOnBinding(scrollEventLocation);
    await tester.sendEventToBinding(testPointer.scroll(const Offset(0.0, -20.0)), result);

    expect(getScrollOffset(tester), 20.0);
  });
278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627

  testWidgets("Keyboard scrolling doesn't happen if scroll physics are set to NeverScrollableScrollPhysics", (WidgetTester tester) async {
    final ScrollController controller = ScrollController();
    await tester.pumpWidget(
      MaterialApp(
        theme: ThemeData(
          platform: TargetPlatform.fuchsia,
        ),
        home: CustomScrollView(
          controller: controller,
          physics: const NeverScrollableScrollPhysics(),
          slivers: List<Widget>.generate(
            20,
            (int index) {
              return SliverToBoxAdapter(
                child: Focus(
                  autofocus: index == 0,
                  child: SizedBox(key: ValueKey<String>('Box $index'), height: 50.0),
                ),
              );
            },
          ),
        ),
      ),
    );

    await tester.pumpAndSettle();
    expect(controller.position.pixels, equals(0.0));
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)));
    await tester.sendKeyDownEvent(modifierKey);
    await tester.sendKeyEvent(LogicalKeyboardKey.arrowDown);
    await tester.sendKeyUpEvent(modifierKey);
    await tester.pumpAndSettle();
    expect(controller.position.pixels, equals(0.0));
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)));
    await tester.sendKeyDownEvent(modifierKey);
    await tester.sendKeyEvent(LogicalKeyboardKey.arrowUp);
    await tester.sendKeyUpEvent(modifierKey);
    await tester.pumpAndSettle();
    expect(controller.position.pixels, equals(0.0));
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)));
    await tester.sendKeyEvent(LogicalKeyboardKey.pageDown);
    await tester.pumpAndSettle();
    expect(controller.position.pixels, equals(0.0));
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)));
    await tester.sendKeyEvent(LogicalKeyboardKey.pageUp);
    await tester.pumpAndSettle();
    expect(controller.position.pixels, equals(0.0));
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)));

    // TODO(gspencergoog): Once we can test against TargetPlatform.macOS instead
    // of Platform.isMacOS, don't skip this on web anymore.
    // https://github.com/flutter/flutter/issues/31366
  }, skip: kIsWeb);

  testWidgets('Vertical scrollables are scrolled when activated via keyboard.', (WidgetTester tester) async {
    final ScrollController controller = ScrollController();
    await tester.pumpWidget(
      MaterialApp(
        theme: ThemeData(
          platform: TargetPlatform.fuchsia,
        ),
        home: CustomScrollView(
          controller: controller,
          slivers: List<Widget>.generate(
            20,
            (int index) {
              return SliverToBoxAdapter(
                child: Focus(
                  autofocus: index == 0,
                  child: SizedBox(key: ValueKey<String>('Box $index'), height: 50.0),
                ),
              );
            },
          ),
        ),
      ),
    );

    await tester.pumpAndSettle();
    expect(controller.position.pixels, equals(0.0));
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)));
    await tester.sendKeyDownEvent(modifierKey);
    await tester.sendKeyEvent(LogicalKeyboardKey.arrowDown);
    await tester.sendKeyUpEvent(modifierKey);
    await tester.pumpAndSettle();
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, -50.0, 800.0, 0.0)));
    await tester.sendKeyDownEvent(modifierKey);
    await tester.sendKeyEvent(LogicalKeyboardKey.arrowUp);
    await tester.sendKeyUpEvent(modifierKey);
    await tester.pumpAndSettle();
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)));
    await tester.sendKeyEvent(LogicalKeyboardKey.pageDown);
    await tester.pumpAndSettle();
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, -400.0, 800.0, -350.0)));
    await tester.sendKeyEvent(LogicalKeyboardKey.pageUp);
    await tester.pumpAndSettle();
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)));

    // TODO(gspencergoog): Once we can test against TargetPlatform.macOS instead
    // of Platform.isMacOS, don't skip this on web anymore.
    // https://github.com/flutter/flutter/issues/31366
  }, skip: kIsWeb);

  testWidgets('Horizontal scrollables are scrolled when activated via keyboard.', (WidgetTester tester) async {
    final ScrollController controller = ScrollController();
    await tester.pumpWidget(
      MaterialApp(
        theme: ThemeData(
          platform: TargetPlatform.fuchsia,
        ),
        home: CustomScrollView(
          controller: controller,
          scrollDirection: Axis.horizontal,
          slivers: List<Widget>.generate(
            20,
            (int index) {
              return SliverToBoxAdapter(
                child: Focus(
                  autofocus: index == 0,
                  child: SizedBox(key: ValueKey<String>('Box $index'), width: 50.0),
                ),
              );
            },
          ),
        ),
      ),
    );

    await tester.pumpAndSettle();
    expect(controller.position.pixels, equals(0.0));
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 50.0, 600.0)));
    await tester.sendKeyDownEvent(modifierKey);
    await tester.sendKeyEvent(LogicalKeyboardKey.arrowRight);
    await tester.sendKeyUpEvent(modifierKey);
    await tester.pumpAndSettle();
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(-50.0, 0.0, 0.0, 600.0)));
    await tester.sendKeyDownEvent(modifierKey);
    await tester.sendKeyEvent(LogicalKeyboardKey.arrowLeft);
    await tester.sendKeyUpEvent(modifierKey);
    await tester.pumpAndSettle();
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 50.0, 600.0)));

    // TODO(gspencergoog): Once we can test against TargetPlatform.macOS instead
    // of Platform.isMacOS, don't skip this on web anymore.
    // https://github.com/flutter/flutter/issues/31366
  }, skip: kIsWeb);

  testWidgets('Horizontal scrollables are scrolled the correct direction in RTL locales.', (WidgetTester tester) async {
    final ScrollController controller = ScrollController();
    await tester.pumpWidget(
      MaterialApp(
        theme: ThemeData(
          platform: TargetPlatform.fuchsia,
        ),
        home: Directionality(
          textDirection: TextDirection.rtl,
          child: CustomScrollView(
            controller: controller,
            scrollDirection: Axis.horizontal,
            slivers: List<Widget>.generate(
              20,
                  (int index) {
                return SliverToBoxAdapter(
                  child: Focus(
                    autofocus: index == 0,
                    child: SizedBox(key: ValueKey<String>('Box $index'), width: 50.0),
                  ),
                );
              },
            ),
          ),
        ),
      ),
    );

    await tester.pumpAndSettle();
    expect(controller.position.pixels, equals(0.0));
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(750.0, 0.0, 800.0, 600.0)));
    await tester.sendKeyDownEvent(modifierKey);
    await tester.sendKeyEvent(LogicalKeyboardKey.arrowLeft);
    await tester.sendKeyUpEvent(modifierKey);
    await tester.pumpAndSettle();
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(800.0, 0.0, 850.0, 600.0)));
    await tester.sendKeyDownEvent(modifierKey);
    await tester.sendKeyEvent(LogicalKeyboardKey.arrowRight);
    await tester.sendKeyUpEvent(modifierKey);
    await tester.pumpAndSettle();
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(750.0, 0.0, 800.0, 600.0)));

    // TODO(gspencergoog): Once we can test against TargetPlatform.macOS instead
    // of Platform.isMacOS, don't skip this on web anymore.
    // https://github.com/flutter/flutter/issues/31366
  }, skip: kIsWeb);

  testWidgets('Reversed vertical scrollables are scrolled when activated via keyboard.', (WidgetTester tester) async {
    final ScrollController controller = ScrollController();
    final FocusNode focusNode = FocusNode(debugLabel: 'SizedBox');
    await tester.pumpWidget(
      MaterialApp(
        theme: ThemeData(
          platform: TargetPlatform.fuchsia,
        ),
        home: CustomScrollView(
          controller: controller,
          reverse: true,
          slivers: List<Widget>.generate(
            20,
            (int index) {
              return SliverToBoxAdapter(
                child: Focus(
                  focusNode: focusNode,
                  child: SizedBox(key: ValueKey<String>('Box $index'), height: 50.0),
                ),
              );
            },
          ),
        ),
      ),
    );

    focusNode.requestFocus();
    await tester.pumpAndSettle();
    expect(controller.position.pixels, equals(0.0));
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 550.0, 800.0, 600.0)));
    await tester.sendKeyDownEvent(modifierKey);
    await tester.sendKeyEvent(LogicalKeyboardKey.arrowUp);
    await tester.sendKeyUpEvent(modifierKey);
    await tester.pumpAndSettle();
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 600.0, 800.0, 650.0)));
    await tester.sendKeyDownEvent(modifierKey);
    await tester.sendKeyEvent(LogicalKeyboardKey.arrowDown);
    await tester.sendKeyUpEvent(modifierKey);
    await tester.pumpAndSettle();
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 550.0, 800.0, 600.0)));
    await tester.sendKeyEvent(LogicalKeyboardKey.pageUp);
    await tester.pumpAndSettle();
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 950.0, 800.0, 1000.0)));
    await tester.sendKeyEvent(LogicalKeyboardKey.pageDown);
    await tester.pumpAndSettle();
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 550.0, 800.0, 600.0)));

    // TODO(gspencergoog): Once we can test against TargetPlatform.macOS instead
    // of Platform.isMacOS, don't skip this on web anymore.
    // https://github.com/flutter/flutter/issues/31366
  }, skip: kIsWeb);

  testWidgets('Reversed horizontal scrollables are scrolled when activated via keyboard.', (WidgetTester tester) async {
    final ScrollController controller = ScrollController();
    final FocusNode focusNode = FocusNode(debugLabel: 'SizedBox');
    await tester.pumpWidget(
      MaterialApp(
        theme: ThemeData(
          platform: TargetPlatform.fuchsia,
        ),
        home: CustomScrollView(
          controller: controller,
          scrollDirection: Axis.horizontal,
          reverse: true,
          slivers: List<Widget>.generate(
            20,
            (int index) {
              return SliverToBoxAdapter(
                child: Focus(
                  focusNode: focusNode,
                  child: SizedBox(key: ValueKey<String>('Box $index'), width: 50.0),
                ),
              );
            },
          ),
        ),
      ),
    );

    focusNode.requestFocus();
    await tester.pumpAndSettle();
    expect(controller.position.pixels, equals(0.0));
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(750.0, 0.0, 800.0, 600.00)));
    await tester.sendKeyDownEvent(modifierKey);
    await tester.sendKeyEvent(LogicalKeyboardKey.arrowLeft);
    await tester.sendKeyUpEvent(modifierKey);
    await tester.pumpAndSettle();
    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(800.0, 0.0, 850.0, 600.0)));
    await tester.sendKeyDownEvent(modifierKey);
    await tester.sendKeyEvent(LogicalKeyboardKey.arrowRight);
    await tester.sendKeyUpEvent(modifierKey);
    await tester.pumpAndSettle();

    // TODO(gspencergoog): Once we can test against TargetPlatform.macOS instead
    // of Platform.isMacOS, don't skip this on web anymore.
    // https://github.com/flutter/flutter/issues/31366
  }, skip: kIsWeb);

  testWidgets('Custom scrollables with a center sliver are scrolled when activated via keyboard.', (WidgetTester tester) async {
    final ScrollController controller = ScrollController();
    final List<String> items = List<String>.generate(20, (int index) => 'Item $index');
    await tester.pumpWidget(
      MaterialApp(
        theme: ThemeData(
          platform: TargetPlatform.fuchsia,
        ),
        home: CustomScrollView(
          controller: controller,
          center: const ValueKey<String>('Center'),
          slivers: items.map<Widget>(
            (String item) {
              return SliverToBoxAdapter(
                key: item == 'Item 10' ? const ValueKey<String>('Center') : null,
                child: Focus(
                  autofocus: item == 'Item 10',
                  child: Container(
                    key: ValueKey<String>(item),
                    alignment: Alignment.center,
                    height: 100,
                    child: Text(item),
                  ),
                ),
              );
            },
          ).toList(),
        ),
      ),
    );

    await tester.pumpAndSettle();
    expect(controller.position.pixels, equals(0.0));
    expect(tester.getRect(find.byKey(const ValueKey<String>('Item 10'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 100.0)));
    for (int i = 0; i < 10; ++i) {
      await tester.sendKeyDownEvent(modifierKey);
      await tester.sendKeyEvent(LogicalKeyboardKey.arrowDown);
      await tester.sendKeyUpEvent(modifierKey);
      await tester.pumpAndSettle();
    }
    // Starts at #10 already, so doesn't work out to 500.0 because it hits bottom.
    expect(controller.position.pixels, equals(400.0));
    expect(tester.getRect(find.byKey(const ValueKey<String>('Item 10'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, -400.0, 800.0, -300.0)));
    for (int i = 0; i < 10; ++i) {
      await tester.sendKeyDownEvent(modifierKey);
      await tester.sendKeyEvent(LogicalKeyboardKey.arrowUp);
      await tester.sendKeyUpEvent(modifierKey);
      await tester.pumpAndSettle();
    }
    // Goes up two past "center" where it started, so negative.
    expect(controller.position.pixels, equals(-100.0));
    expect(tester.getRect(find.byKey(const ValueKey<String>('Item 10'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 100.0, 800.0, 200.0)));

    // TODO(gspencergoog): Once we can test against TargetPlatform.macOS instead
    // of Platform.isMacOS, don't skip this on web anymore.
    // https://github.com/flutter/flutter/issues/31366
  }, skip: kIsWeb);
628
}