column_test.dart 28.9 KB
Newer Older
1 2 3 4 5 6 7 8 9
// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter_test/flutter_test.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/widgets.dart';

void main() {
10 11
  // DOWN (default)

12
  testWidgets('Column with one flexible child', (WidgetTester tester) async {
13 14 15 16
    const Key columnKey = Key('column');
    const Key child0Key = Key('child0');
    const Key child1Key = Key('child1');
    const Key child2Key = Key('child2');
17 18 19 20

    // Default is MainAxisSize.max so the Column should be as high as the test: 600.
    // Default is MainAxisAlignment.start so children so the children's
    // top edges should be at 0, 100, 500, child2's height should be 400.
21 22
    await tester.pumpWidget(Center(
      child: Column(
23 24
        key: columnKey,
        children: <Widget>[
25 26 27
          Container(key: child0Key, width: 100.0, height: 100.0),
          Expanded(child: Container(key: child1Key, width: 100.0, height: 100.0)),
          Container(key: child2Key, width: 100.0, height: 100.0),
28 29
        ],
      ),
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58
    ));

    RenderBox renderBox;
    BoxParentData boxParentData;

    renderBox = tester.renderObject(find.byKey(columnKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(600.0));

    renderBox = tester.renderObject(find.byKey(child0Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(0.0));

    renderBox = tester.renderObject(find.byKey(child1Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(400.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(100.0));

    renderBox = tester.renderObject(find.byKey(child2Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(500.0));
  });

  testWidgets('Column with default main axis parameters', (WidgetTester tester) async {
59 60 61 62
    const Key columnKey = Key('column');
    const Key child0Key = Key('child0');
    const Key child1Key = Key('child1');
    const Key child2Key = Key('child2');
63 64 65 66

    // Default is MainAxisSize.max so the Column should be as high as the test: 600.
    // Default is MainAxisAlignment.start so children so the children's
    // top edges should be at 0, 100, 200
67 68
    await tester.pumpWidget(Center(
      child: Column(
69 70
        key: columnKey,
        children: <Widget>[
71 72 73
          Container(key: child0Key, width: 100.0, height: 100.0),
          Container(key: child1Key, width: 100.0, height: 100.0),
          Container(key: child2Key, width: 100.0, height: 100.0),
74 75
        ],
      ),
76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104
    ));

    RenderBox renderBox;
    BoxParentData boxParentData;

    renderBox = tester.renderObject(find.byKey(columnKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(600.0));

    renderBox = tester.renderObject(find.byKey(child0Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(0.0));

    renderBox = tester.renderObject(find.byKey(child1Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(100.0));

    renderBox = tester.renderObject(find.byKey(child2Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(200.0));
  });

  testWidgets('Column with MainAxisAlignment.center', (WidgetTester tester) async {
105 106 107
    const Key columnKey = Key('column');
    const Key child0Key = Key('child0');
    const Key child1Key = Key('child1');
108 109 110

    // Default is MainAxisSize.max so the Column should be as high as the test: 600.
    // The 100x100 children's top edges should be at 200, 300
111 112
    await tester.pumpWidget(Center(
      child: Column(
113 114 115
        key: columnKey,
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
116 117
          Container(key: child0Key, width: 100.0, height: 100.0),
          Container(key: child1Key, width: 100.0, height: 100.0),
118 119
        ],
      ),
120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142
    ));

    RenderBox renderBox;
    BoxParentData boxParentData;

    renderBox = tester.renderObject(find.byKey(columnKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(600.0));

    renderBox = tester.renderObject(find.byKey(child0Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(200.0));

    renderBox = tester.renderObject(find.byKey(child1Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(300.0));
  });

  testWidgets('Column with MainAxisAlignment.end', (WidgetTester tester) async {
143 144 145 146
    const Key columnKey = Key('column');
    const Key child0Key = Key('child0');
    const Key child1Key = Key('child1');
    const Key child2Key = Key('child2');
147 148 149

    // Default is MainAxisSize.max so the Column should be as high as the test: 600.
    // The 100x100 children's top edges should be at 300, 400, 500.
150 151
    await tester.pumpWidget(Center(
      child: Column(
152 153 154
        key: columnKey,
        mainAxisAlignment: MainAxisAlignment.end,
        children: <Widget>[
155 156 157
          Container(key: child0Key, width: 100.0, height: 100.0),
          Container(key: child1Key, width: 100.0, height: 100.0),
          Container(key: child2Key, width: 100.0, height: 100.0),
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
    ));

    RenderBox renderBox;
    BoxParentData boxParentData;

    renderBox = tester.renderObject(find.byKey(columnKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(600.0));

    renderBox = tester.renderObject(find.byKey(child0Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(300.0));

    renderBox = tester.renderObject(find.byKey(child1Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(400.0));

    renderBox = tester.renderObject(find.byKey(child2Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(500.0));
  });

  testWidgets('Column with MainAxisAlignment.spaceBetween', (WidgetTester tester) async {
189 190 191 192
    const Key columnKey = Key('column');
    const Key child0Key = Key('child0');
    const Key child1Key = Key('child1');
    const Key child2Key = Key('child2');
193 194 195

    // Default is MainAxisSize.max so the Column should be as high as the test: 600.
    // The 100x100 children's top edges should be at 0, 250, 500
196 197
    await tester.pumpWidget(Center(
      child: Column(
198 199 200
        key: columnKey,
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: <Widget>[
201 202 203
          Container(key: child0Key, width: 100.0, height: 100.0),
          Container(key: child1Key, width: 100.0, height: 100.0),
          Container(key: child2Key, width: 100.0, height: 100.0),
204 205
        ],
      ),
206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234
    ));

    RenderBox renderBox;
    BoxParentData boxParentData;

    renderBox = tester.renderObject(find.byKey(columnKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(600.0));

    renderBox = tester.renderObject(find.byKey(child0Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(0.0));

    renderBox = tester.renderObject(find.byKey(child1Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(250.0));

    renderBox = tester.renderObject(find.byKey(child2Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(500.0));
  });

  testWidgets('Column with MainAxisAlignment.spaceAround', (WidgetTester tester) async {
235 236 237 238 239
    const Key columnKey = Key('column');
    const Key child0Key = Key('child0');
    const Key child1Key = Key('child1');
    const Key child2Key = Key('child2');
    const Key child3Key = Key('child3');
240 241 242

    // Default is MainAxisSize.max so the Column should be as high as the test: 600.
    // The 100x100 children's top edges should be at 25, 175, 325, 475
243 244
    await tester.pumpWidget(Center(
      child: Column(
245 246 247
        key: columnKey,
        mainAxisAlignment: MainAxisAlignment.spaceAround,
        children: <Widget>[
248 249 250 251
          Container(key: child0Key, width: 100.0, height: 100.0),
          Container(key: child1Key, width: 100.0, height: 100.0),
          Container(key: child2Key, width: 100.0, height: 100.0),
          Container(key: child3Key, width: 100.0, height: 100.0),
252 253
        ],
      ),
254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288
    ));

    RenderBox renderBox;
    BoxParentData boxParentData;

    renderBox = tester.renderObject(find.byKey(columnKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(600.0));

    renderBox = tester.renderObject(find.byKey(child0Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(25.0));

    renderBox = tester.renderObject(find.byKey(child1Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(175.0));

    renderBox = tester.renderObject(find.byKey(child2Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(325.0));

    renderBox = tester.renderObject(find.byKey(child3Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(475.0));
  });

  testWidgets('Column with MainAxisAlignment.spaceEvenly', (WidgetTester tester) async {
289 290 291 292
    const Key columnKey = Key('column');
    const Key child0Key = Key('child0');
    const Key child1Key = Key('child1');
    const Key child2Key = Key('child2');
293 294 295

    // Default is MainAxisSize.max so the Column should be as high as the test: 600.
    // The 100x20 children's top edges should be at 135, 290, 445
296 297
    await tester.pumpWidget(Center(
      child: Column(
298 299 300
        key: columnKey,
        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
        children: <Widget>[
301 302 303
          Container(key: child0Key, width: 100.0, height: 20.0),
          Container(key: child1Key, width: 100.0, height: 20.0),
          Container(key: child2Key, width: 100.0, height: 20.0),
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
    ));

    RenderBox renderBox;
    BoxParentData boxParentData;

    renderBox = tester.renderObject(find.byKey(columnKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(600.0));

    renderBox = tester.renderObject(find.byKey(child0Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(20.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(135.0));

    renderBox = tester.renderObject(find.byKey(child1Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(20.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(290.0));

    renderBox = tester.renderObject(find.byKey(child2Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(20.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(445.0));
  });

  testWidgets('Column and MainAxisSize.min', (WidgetTester tester) async {
335
    const Key flexKey = Key('flexKey');
336 337

    // Default is MainAxisSize.max so the Column should be as high as the test: 600.
338 339
    await tester.pumpWidget(Center(
      child: Column(
340 341
        key: flexKey,
        children: <Widget>[
342
          Container(width: 100.0, height: 100.0),
343 344 345
          Container(width: 100.0, height: 150.0),
        ],
      ),
346 347 348 349 350 351
    ));
    RenderBox renderBox = tester.renderObject(find.byKey(flexKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(600.0));

    // Column with MainAxisSize.min without flexible children shrink wraps.
352 353
    await tester.pumpWidget(Center(
      child: Column(
354 355 356
        key: flexKey,
        mainAxisSize: MainAxisSize.min,
        children: <Widget>[
357
          Container(width: 100.0, height: 100.0),
358 359 360
          Container(width: 100.0, height: 150.0),
        ],
      ),
361 362 363 364 365 366 367
    ));
    renderBox = tester.renderObject(find.byKey(flexKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(250.0));
  });

  testWidgets('Column MainAxisSize.min layout at zero size', (WidgetTester tester) async {
368
    const Key childKey = Key('childKey');
369

370 371
    await tester.pumpWidget(Center(
      child: Container(
372 373
        width: 0.0,
        height: 0.0,
374
        child: Column(
375 376
          mainAxisSize: MainAxisSize.min,
          children: <Widget>[
377
            Container(
378 379
              key: childKey,
              width: 100.0,
380 381 382 383 384
              height: 100.0,
            ),
          ],
        ),
      ),
385 386
    ));

387
    final RenderBox renderBox = tester.renderObject(find.byKey(childKey));
388 389 390
    expect(renderBox.size.width, equals(0.0));
    expect(renderBox.size.height, equals(100.0));
  });
391 392 393 394 395


  // UP

  testWidgets('Column with one flexible child', (WidgetTester tester) async {
396 397 398 399
    const Key columnKey = Key('column');
    const Key child0Key = Key('child0');
    const Key child1Key = Key('child1');
    const Key child2Key = Key('child2');
400 401 402 403

    // Default is MainAxisSize.max so the Column should be as high as the test: 600.
    // Default is MainAxisAlignment.start so children so the children's
    // bottom edges should be at 0, 100, 500 from bottom, child2's height should be 400.
404 405
    await tester.pumpWidget(Center(
      child: Column(
406 407 408
        key: columnKey,
        verticalDirection: VerticalDirection.up,
        children: <Widget>[
409 410 411
          Container(key: child0Key, width: 100.0, height: 100.0),
          Expanded(child: Container(key: child1Key, width: 100.0, height: 100.0)),
          Container(key: child2Key, width: 100.0, height: 100.0),
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
    ));

    RenderBox renderBox;
    BoxParentData boxParentData;

    renderBox = tester.renderObject(find.byKey(columnKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(600.0));

    renderBox = tester.renderObject(find.byKey(child0Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(500.0));

    renderBox = tester.renderObject(find.byKey(child1Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(400.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(100.0));

    renderBox = tester.renderObject(find.byKey(child2Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(0.0));
  });

  testWidgets('Column with default main axis parameters', (WidgetTester tester) async {
443 444 445 446
    const Key columnKey = Key('column');
    const Key child0Key = Key('child0');
    const Key child1Key = Key('child1');
    const Key child2Key = Key('child2');
447 448 449 450

    // Default is MainAxisSize.max so the Column should be as high as the test: 600.
    // Default is MainAxisAlignment.start so children so the children's
    // bottom edges should be at 0, 100, 200 from bottom
451 452
    await tester.pumpWidget(Center(
      child: Column(
453 454 455
        key: columnKey,
        verticalDirection: VerticalDirection.up,
        children: <Widget>[
456 457 458
          Container(key: child0Key, width: 100.0, height: 100.0),
          Container(key: child1Key, width: 100.0, height: 100.0),
          Container(key: child2Key, width: 100.0, height: 100.0),
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
    ));

    RenderBox renderBox;
    BoxParentData boxParentData;

    renderBox = tester.renderObject(find.byKey(columnKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(600.0));

    renderBox = tester.renderObject(find.byKey(child0Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(500.0));

    renderBox = tester.renderObject(find.byKey(child1Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(400.0));

    renderBox = tester.renderObject(find.byKey(child2Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(300.0));
  });

  testWidgets('Column with MainAxisAlignment.center', (WidgetTester tester) async {
490 491 492
    const Key columnKey = Key('column');
    const Key child0Key = Key('child0');
    const Key child1Key = Key('child1');
493 494 495

    // Default is MainAxisSize.max so the Column should be as high as the test: 600.
    // The 100x100 children's bottom edges should be at 200, 300 from bottom
496 497
    await tester.pumpWidget(Center(
      child: Column(
498 499 500 501
        key: columnKey,
        mainAxisAlignment: MainAxisAlignment.center,
        verticalDirection: VerticalDirection.up,
        children: <Widget>[
502 503
          Container(key: child0Key, width: 100.0, height: 100.0),
          Container(key: child1Key, width: 100.0, height: 100.0),
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
    ));

    RenderBox renderBox;
    BoxParentData boxParentData;

    renderBox = tester.renderObject(find.byKey(columnKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(600.0));

    renderBox = tester.renderObject(find.byKey(child0Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(300.0));

    renderBox = tester.renderObject(find.byKey(child1Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(200.0));
  });

  testWidgets('Column with MainAxisAlignment.end', (WidgetTester tester) async {
529 530 531 532
    const Key columnKey = Key('column');
    const Key child0Key = Key('child0');
    const Key child1Key = Key('child1');
    const Key child2Key = Key('child2');
533 534 535

    // Default is MainAxisSize.max so the Column should be as high as the test: 600.
    // The 100x100 children's bottom edges should be at 300, 400, 500 from bottom.
536 537
    await tester.pumpWidget(Center(
      child: Column(
538 539 540 541
        key: columnKey,
        mainAxisAlignment: MainAxisAlignment.end,
        verticalDirection: VerticalDirection.up,
        children: <Widget>[
542 543 544
          Container(key: child0Key, width: 100.0, height: 100.0),
          Container(key: child1Key, width: 100.0, height: 100.0),
          Container(key: child2Key, width: 100.0, height: 100.0),
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
    ));

    RenderBox renderBox;
    BoxParentData boxParentData;

    renderBox = tester.renderObject(find.byKey(columnKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(600.0));

    renderBox = tester.renderObject(find.byKey(child0Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(200.0));

    renderBox = tester.renderObject(find.byKey(child1Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(100.0));

    renderBox = tester.renderObject(find.byKey(child2Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(0.0));
  });

  testWidgets('Column with MainAxisAlignment.spaceBetween', (WidgetTester tester) async {
576 577 578 579
    const Key columnKey = Key('column');
    const Key child0Key = Key('child0');
    const Key child1Key = Key('child1');
    const Key child2Key = Key('child2');
580 581 582

    // Default is MainAxisSize.max so the Column should be as high as the test: 600.
    // The 100x100 children's bottom edges should be at 0, 250, 500 from bottom
583 584
    await tester.pumpWidget(Center(
      child: Column(
585 586 587 588
        key: columnKey,
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        verticalDirection: VerticalDirection.up,
        children: <Widget>[
589 590 591
          Container(key: child0Key, width: 100.0, height: 100.0),
          Container(key: child1Key, width: 100.0, height: 100.0),
          Container(key: child2Key, width: 100.0, height: 100.0),
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
    ));

    RenderBox renderBox;
    BoxParentData boxParentData;

    renderBox = tester.renderObject(find.byKey(columnKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(600.0));

    renderBox = tester.renderObject(find.byKey(child0Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(500.0));

    renderBox = tester.renderObject(find.byKey(child1Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(250.0));

    renderBox = tester.renderObject(find.byKey(child2Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(0.0));
  });

  testWidgets('Column with MainAxisAlignment.spaceAround', (WidgetTester tester) async {
623 624 625 626 627
    const Key columnKey = Key('column');
    const Key child0Key = Key('child0');
    const Key child1Key = Key('child1');
    const Key child2Key = Key('child2');
    const Key child3Key = Key('child3');
628 629 630

    // Default is MainAxisSize.max so the Column should be as high as the test: 600.
    // The 100x100 children's bottom edges should be at 25, 175, 325, 475 from bottom
631 632
    await tester.pumpWidget(Center(
      child: Column(
633 634 635 636
        key: columnKey,
        mainAxisAlignment: MainAxisAlignment.spaceAround,
        verticalDirection: VerticalDirection.up,
        children: <Widget>[
637 638 639 640
          Container(key: child0Key, width: 100.0, height: 100.0),
          Container(key: child1Key, width: 100.0, height: 100.0),
          Container(key: child2Key, width: 100.0, height: 100.0),
          Container(key: child3Key, width: 100.0, height: 100.0),
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
    ));

    RenderBox renderBox;
    BoxParentData boxParentData;

    renderBox = tester.renderObject(find.byKey(columnKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(600.0));

    renderBox = tester.renderObject(find.byKey(child0Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(500.0 - 25.0));

    renderBox = tester.renderObject(find.byKey(child1Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(500.0 - 175.0));

    renderBox = tester.renderObject(find.byKey(child2Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(500.0 - 325.0));

    renderBox = tester.renderObject(find.byKey(child3Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(100.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(500.0 - 475.0));
  });

  testWidgets('Column with MainAxisAlignment.spaceEvenly', (WidgetTester tester) async {
678 679 680 681
    const Key columnKey = Key('column');
    const Key child0Key = Key('child0');
    const Key child1Key = Key('child1');
    const Key child2Key = Key('child2');
682 683 684

    // Default is MainAxisSize.max so the Column should be as high as the test: 600.
    // The 100x20 children's bottom edges should be at 135, 290, 445 from bottom
685 686
    await tester.pumpWidget(Center(
      child: Column(
687 688 689 690
        key: columnKey,
        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
        verticalDirection: VerticalDirection.up,
        children: <Widget>[
691 692 693
          Container(key: child0Key, width: 100.0, height: 20.0),
          Container(key: child1Key, width: 100.0, height: 20.0),
          Container(key: child2Key, width: 100.0, height: 20.0),
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
    ));

    RenderBox renderBox;
    BoxParentData boxParentData;

    renderBox = tester.renderObject(find.byKey(columnKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(600.0));

    renderBox = tester.renderObject(find.byKey(child0Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(20.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(600.0 - 135.0 - 20.0));

    renderBox = tester.renderObject(find.byKey(child1Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(20.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(600.0 - 290.0 - 20.0));

    renderBox = tester.renderObject(find.byKey(child2Key));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(20.0));
    boxParentData = renderBox.parentData;
    expect(boxParentData.offset.dy, equals(600.0 - 445.0 - 20.0));
  });

  testWidgets('Column and MainAxisSize.min', (WidgetTester tester) async {
725
    const Key flexKey = Key('flexKey');
726 727

    // Default is MainAxisSize.max so the Column should be as high as the test: 600.
728 729
    await tester.pumpWidget(Center(
      child: Column(
730 731 732
        key: flexKey,
        verticalDirection: VerticalDirection.up,
        children: <Widget>[
733
          Container(width: 100.0, height: 100.0),
734 735 736
          Container(width: 100.0, height: 150.0),
        ],
      ),
737 738 739 740 741 742
    ));
    RenderBox renderBox = tester.renderObject(find.byKey(flexKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(600.0));

    // Column with MainAxisSize.min without flexible children shrink wraps.
743 744
    await tester.pumpWidget(Center(
      child: Column(
745 746 747 748
        key: flexKey,
        mainAxisSize: MainAxisSize.min,
        verticalDirection: VerticalDirection.up,
        children: <Widget>[
749
          Container(width: 100.0, height: 100.0),
750 751 752
          Container(width: 100.0, height: 150.0),
        ],
      ),
753 754 755 756 757 758 759
    ));
    renderBox = tester.renderObject(find.byKey(flexKey));
    expect(renderBox.size.width, equals(100.0));
    expect(renderBox.size.height, equals(250.0));
  });

  testWidgets('Column MainAxisSize.min layout at zero size', (WidgetTester tester) async {
760
    const Key childKey = Key('childKey');
761

762 763
    await tester.pumpWidget(Center(
      child: Container(
764 765
        width: 0.0,
        height: 0.0,
766
        child: Column(
767 768 769
          mainAxisSize: MainAxisSize.min,
          verticalDirection: VerticalDirection.up,
          children: <Widget>[
770
            Container(
771 772
              key: childKey,
              width: 100.0,
773 774 775 776 777
              height: 100.0,
            ),
          ],
        ),
      ),
778 779 780 781 782 783
    ));

    final RenderBox renderBox = tester.renderObject(find.byKey(childKey));
    expect(renderBox.size.width, equals(0.0));
    expect(renderBox.size.height, equals(100.0));
  });
784
}