about_test.dart 33.9 KB
Newer Older
Ian Hickson's avatar
Ian Hickson committed
1
// Copyright 2014 The Flutter Authors. All rights reserved.
2 3 4 5
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'dart:async';
6
import 'dart:ui';
7

8
import 'package:flutter/cupertino.dart';
9 10 11 12 13
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';

void main() {
14 15 16 17
  tearDown(() {
    LicenseRegistry.reset();
  });

18 19 20 21 22 23 24 25 26 27 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
  testWidgets('Material3 has sentence case labels', (WidgetTester tester) async {
    await tester.pumpWidget(MaterialApp(
      theme: ThemeData(useMaterial3: true),
      builder: (BuildContext context, Widget? child) {
        return MediaQuery(
          // Display has a vertical hinge down the middle
          data: const MediaQueryData(
            size: Size(800, 600),
            displayFeatures: <DisplayFeature>[
              DisplayFeature(
                bounds: Rect.fromLTRB(390, 0, 410, 600),
                type: DisplayFeatureType.hinge,
                state: DisplayFeatureState.unknown,
              ),
            ],
          ),
          child: child!,
        );
      },
      home: Builder(
        builder: (BuildContext context) => ElevatedButton(
          onPressed: () {
            showAboutDialog(
              context: context,
              useRootNavigator: false,
              applicationName: 'A',
            );
          },
          child: const Text('Show About Dialog'),
        ),
      ),
    ));

    // Open the dialog.
    await tester.tap(find.byType(ElevatedButton));
    await tester.pumpAndSettle();
    expect(find.text('Close'), findsOneWidget);
    expect(find.text('View licenses'), findsOneWidget);
  });

58
  testWidgets('AboutListTile control test', (WidgetTester tester) async {
59 60
    const FlutterLogo logo = FlutterLogo();

61
    await tester.pumpWidget(
62
      MaterialApp(
63
        title: 'Pirate app',
64 65
        home: Scaffold(
          appBar: AppBar(
66
            title: const Text('Home'),
67
          ),
68 69
          drawer: Drawer(
            child: ListView(
70
              children: const <Widget>[
71
                AboutListTile(
72
                  applicationVersion: '0.1.2',
73
                  applicationIcon: logo,
74
                  applicationLegalese: 'I am the very model of a modern major general.',
75 76
                  aboutBoxChildren: <Widget>[
                    Text('About box'),
77
                  ],
78 79 80 81 82 83 84 85 86 87
                ),
              ],
            ),
          ),
        ),
      ),
    );

    expect(find.text('About Pirate app'), findsNothing);
    expect(find.text('0.1.2'), findsNothing);
88 89 90 91 92
    expect(find.byWidget(logo), findsNothing);
    expect(
      find.text('I am the very model of a modern major general.'),
      findsNothing,
    );
93 94 95
    expect(find.text('About box'), findsNothing);

    await tester.tap(find.byType(IconButton));
96
    await tester.pumpAndSettle();
97 98 99

    expect(find.text('About Pirate app'), findsOneWidget);
    expect(find.text('0.1.2'), findsNothing);
100 101 102 103 104
    expect(find.byWidget(logo), findsNothing);
    expect(
      find.text('I am the very model of a modern major general.'),
      findsNothing,
    );
105 106 107
    expect(find.text('About box'), findsNothing);

    await tester.tap(find.text('About Pirate app'));
108
    await tester.pumpAndSettle();
109 110 111

    expect(find.text('About Pirate app'), findsOneWidget);
    expect(find.text('0.1.2'), findsOneWidget);
112 113 114 115 116
    expect(find.byWidget(logo), findsOneWidget);
    expect(
      find.text('I am the very model of a modern major general.'),
      findsOneWidget,
    );
117 118 119
    expect(find.text('About box'), findsOneWidget);

    LicenseRegistry.addLicense(() {
120
      return Stream<LicenseEntry>.fromIterable(<LicenseEntry>[
121
        const LicenseEntryWithLineBreaks(<String>['Pirate package '], 'Pirate license'),
122 123 124 125
      ]);
    });

    await tester.tap(find.text('VIEW LICENSES'));
126
    await tester.pumpAndSettle();
127

128 129 130 131 132 133 134
    expect(find.text('Pirate app'), findsOneWidget);
    expect(find.text('0.1.2'), findsOneWidget);
    expect(find.byWidget(logo), findsOneWidget);
    expect(
      find.text('I am the very model of a modern major general.'),
      findsOneWidget,
    );
135
    await tester.tap(find.text('Pirate package '));
136
    await tester.pumpAndSettle();
137
    expect(find.text('Pirate license'), findsOneWidget);
138
  });
139

140 141
  testWidgets('About box logic defaults to executable name for app name', (WidgetTester tester) async {
    await tester.pumpWidget(
142
      const MaterialApp(
Hans Muller's avatar
Hans Muller committed
143
        title: 'flutter_tester',
144
        home: Material(child: AboutListTile()),
145
      ),
146
    );
147
    expect(find.text('About flutter_tester'), findsOneWidget);
148 149
  });

150
  testWidgets('LicensePage control test', (WidgetTester tester) async {
151
    LicenseRegistry.addLicense(() {
152
      return Stream<LicenseEntry>.fromIterable(<LicenseEntry>[
153
        const LicenseEntryWithLineBreaks(<String>['AAA'], 'BBB'),
154
      ]);
155 156 157
    });

    LicenseRegistry.addLicense(() {
158
      return Stream<LicenseEntry>.fromIterable(<LicenseEntry>[
159 160 161 162
        const LicenseEntryWithLineBreaks(
          <String>['Another package'],
          'Another license',
        ),
163 164 165
      ]);
    });

166
    await tester.pumpWidget(
167 168
      const MaterialApp(
        home: Center(
169
          child: LicensePage(),
170 171 172
        ),
      ),
    );
173

174 175 176 177
    expect(find.text('AAA'), findsNothing);
    expect(find.text('BBB'), findsNothing);
    expect(find.text('Another package'), findsNothing);
    expect(find.text('Another license'), findsNothing);
178

179
    await tester.pumpAndSettle();
180

181
    // Check for packages.
182 183
    expect(find.text('AAA'), findsOneWidget);
    expect(find.text('Another package'), findsOneWidget);
184 185 186

    // Check license is displayed after entering into license page for 'AAA'.
    await tester.tap(find.text('AAA'));
187
    await tester.pumpAndSettle();
188 189 190 191 192 193 194 195 196
    expect(find.text('BBB'), findsOneWidget);

    /// Go back to list of packages.
    await tester.pageBack();
    await tester.pumpAndSettle();

    /// Check license is displayed after entering into license page for
    /// 'Another package'.
    await tester.tap(find.text('Another package'));
197
    await tester.pumpAndSettle();
198
    expect(find.text('Another license'), findsOneWidget);
199
  });
200

201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255
  testWidgets('LicensePage control test with all properties', (WidgetTester tester) async {
    const FlutterLogo logo = FlutterLogo();

    LicenseRegistry.addLicense(() {
      return Stream<LicenseEntry>.fromIterable(<LicenseEntry>[
        const LicenseEntryWithLineBreaks(<String>['AAA'], 'BBB'),
      ]);
    });

    LicenseRegistry.addLicense(() {
      return Stream<LicenseEntry>.fromIterable(<LicenseEntry>[
        const LicenseEntryWithLineBreaks(
          <String>['Another package'],
          'Another license',
        ),
      ]);
    });

    await tester.pumpWidget(
      const MaterialApp(
        title: 'Pirate app',
        home: Center(
          child: LicensePage(
            applicationName: 'LicensePage test app',
            applicationVersion: '0.1.2',
            applicationIcon: logo,
            applicationLegalese: 'I am the very model of a modern major general.',
          ),
        ),
      ),
    );

    expect(find.text('Pirate app'), findsNothing);
    expect(find.text('LicensePage test app'), findsOneWidget);
    expect(find.text('0.1.2'), findsOneWidget);
    expect(find.byWidget(logo), findsOneWidget);
    expect(
      find.text('I am the very model of a modern major general.'),
      findsOneWidget,
    );
    expect(find.text('AAA'), findsNothing);
    expect(find.text('BBB'), findsNothing);
    expect(find.text('Another package'), findsNothing);
    expect(find.text('Another license'), findsNothing);

    await tester.pumpAndSettle();

    expect(find.text('Pirate app'), findsNothing);
    expect(find.text('LicensePage test app'), findsOneWidget);
    expect(find.text('0.1.2'), findsOneWidget);
    expect(find.byWidget(logo), findsOneWidget);
    expect(
      find.text('I am the very model of a modern major general.'),
      findsOneWidget,
    );
256 257

    // Check for packages.
258 259
    expect(find.text('AAA'), findsOneWidget);
    expect(find.text('Another package'), findsOneWidget);
260 261 262

    // Check license is displayed after entering into license page for 'AAA'.
    await tester.tap(find.text('AAA'));
263
    await tester.pumpAndSettle();
264 265 266 267 268 269 270 271 272
    expect(find.text('BBB'), findsOneWidget);

    /// Go back to list of packages.
    await tester.pageBack();
    await tester.pumpAndSettle();

    /// Check license is displayed after entering into license page for
    /// 'Another package'.
    await tester.tap(find.text('Another package'));
273
    await tester.pumpAndSettle();
274
    expect(find.text('Another license'), findsOneWidget);
275
  });
276

277
  testWidgets('_PackageLicensePage title style without AppBarTheme', (WidgetTester tester) async {
278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298
    LicenseRegistry.addLicense(() {
      return Stream<LicenseEntry>.fromIterable(<LicenseEntry>[
        const LicenseEntryWithLineBreaks(<String>['AAA'], 'BBB'),
      ]);
    });

    const TextStyle titleTextStyle = TextStyle(
      fontSize: 20,
      color: Colors.black,
      inherit: false,
    );
    const TextStyle subtitleTextStyle = TextStyle(
      fontSize: 15,
      color: Colors.red,
      inherit: false,
    );

    await tester.pumpWidget(
      MaterialApp(
        theme: ThemeData(
          primaryTextTheme: const TextTheme(
299 300
            titleLarge: titleTextStyle,
            titleSmall: subtitleTextStyle,
301 302 303 304 305 306 307 308 309 310 311 312 313 314
          ),
        ),
        home: const Center(
          child: LicensePage(),
        ),
      ),
    );
    await tester.pumpAndSettle();

    // Check for packages.
    expect(find.text('AAA'), findsOneWidget);

    // Check license is displayed after entering into license page for 'AAA'.
    await tester.tap(find.text('AAA'));
315
    await tester.pumpAndSettle();
316 317 318 319 320 321

    // Check for titles style.
    final Text title = tester.widget(find.text('AAA'));
    expect(title.style, titleTextStyle);
    final Text subtitle = tester.widget(find.text('1 license.'));
    expect(subtitle.style, subtitleTextStyle);
322
  });
323

324
  testWidgets('_PackageLicensePage title style with AppBarTheme', (WidgetTester tester) async {
325 326 327 328 329 330 331 332
    LicenseRegistry.addLicense(() {
      return Stream<LicenseEntry>.fromIterable(<LicenseEntry>[
        const LicenseEntryWithLineBreaks(<String>['AAA'], 'BBB'),
      ]);
    });

    const TextStyle titleTextStyle = TextStyle(
      fontSize: 20,
333
      color: Colors.indigo,
334 335 336
    );
    const TextStyle subtitleTextStyle = TextStyle(
      fontSize: 15,
337
      color: Colors.indigo,
338 339 340 341 342 343 344
    );

    await tester.pumpWidget(
      MaterialApp(
        theme: ThemeData(
          // Not used because appBarTheme is prioritized.
          primaryTextTheme: const TextTheme(
345
            titleLarge: TextStyle(
346 347 348
              fontSize: 12,
              color: Colors.grey,
            ),
349
            titleSmall: TextStyle(
350 351 352 353 354 355
              fontSize: 10,
              color: Colors.grey,
            ),
          ),
          appBarTheme: const AppBarTheme(
            textTheme: TextTheme(
356 357
              titleLarge: titleTextStyle,
              titleSmall: subtitleTextStyle,
358
            ),
359
            foregroundColor: Colors.indigo,
360 361 362 363 364 365 366 367 368 369 370 371 372 373
          ),
        ),
        home: const Center(
          child: LicensePage(),
        ),
      ),
    );
    await tester.pumpAndSettle();

    // Check for packages.
    expect(find.text('AAA'), findsOneWidget);

    // Check license is displayed after entering into license page for 'AAA'.
    await tester.tap(find.text('AAA'));
374
    await tester.pumpAndSettle();
375 376 377 378 379 380

    // Check for titles style.
    final Text title = tester.widget(find.text('AAA'));
    expect(title.style, titleTextStyle);
    final Text subtitle = tester.widget(find.text('1 license.'));
    expect(subtitle.style, subtitleTextStyle);
381
  });
382

383 384 385 386 387
  testWidgets('LicensePage respects the notch', (WidgetTester tester) async {
    const double safeareaPadding = 27.0;

    LicenseRegistry.addLicense(() {
      return Stream<LicenseEntry>.fromIterable(<LicenseEntry>[
388
        const LicenseEntryWithLineBreaks(<String>['ABC'], 'DEF'),
389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404
      ]);
    });

    await tester.pumpWidget(
      const MaterialApp(
        home: MediaQuery(
          data: MediaQueryData(
            padding: EdgeInsets.all(safeareaPadding),
          ),
          child: LicensePage(),
        ),
      ),
    );

    await tester.pumpAndSettle();

405 406 407 408 409 410
    // The position of the top left of app bar title should indicate whether
    // the safe area is sufficiently respected.
    expect(
      tester.getTopLeft(find.text('Licenses')),
      const Offset(16.0 + safeareaPadding, 18.0 + safeareaPadding),
    );
411
  });
412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434

  testWidgets('LicensePage returns early if unmounted', (WidgetTester tester) async {
    final Completer<LicenseEntry> licenseCompleter = Completer<LicenseEntry>();
    LicenseRegistry.addLicense(() {
      return Stream<LicenseEntry>.fromFuture(licenseCompleter.future);
    });

    await tester.pumpWidget(
      const MaterialApp(
        home: LicensePage(),
      ),
    );
    await tester.pump();

    await tester.pumpWidget(
      const MaterialApp(
        home: Placeholder(),
      ),
    );

    await tester.pumpAndSettle();
    final FakeLicenseEntry licenseEntry = FakeLicenseEntry();
    licenseCompleter.complete(licenseEntry);
435
    expect(licenseEntry.packagesCalled, false);
436
  });
437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459

  testWidgets('LicensePage returns late if unmounted', (WidgetTester tester) async {
    final Completer<LicenseEntry> licenseCompleter = Completer<LicenseEntry>();
    LicenseRegistry.addLicense(() {
      return Stream<LicenseEntry>.fromFuture(licenseCompleter.future);
    });

    await tester.pumpWidget(
      const MaterialApp(
        home: LicensePage(),
      ),
    );
    await tester.pump();
    final FakeLicenseEntry licenseEntry = FakeLicenseEntry();
    licenseCompleter.complete(licenseEntry);

    await tester.pumpWidget(
      const MaterialApp(
        home: Placeholder(),
      ),
    );

    await tester.pumpAndSettle();
460
    expect(licenseEntry.packagesCalled, true);
461
  });
462 463 464 465 466 467 468 469 470 471

  testWidgets('LicensePage logic defaults to executable name for app name', (WidgetTester tester) async {
    await tester.pumpWidget(
      const MaterialApp(
        title: 'flutter_tester',
        home: Material(child: LicensePage()),
      ),
    );
    expect(find.text('flutter_tester'), findsOneWidget);
  });
472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491

  testWidgets('AboutListTile dense property is applied', (WidgetTester tester) async {
    await tester.pumpWidget(const MaterialApp(
      home: Material(child: Center(child: AboutListTile())),
    ));
    Rect tileRect = tester.getRect(find.byType(AboutListTile));
    expect(tileRect.height, 56.0);

    await tester.pumpWidget(const MaterialApp(
      home: Material(child: Center(child: AboutListTile(dense: false))),
    ));
    tileRect = tester.getRect(find.byType(AboutListTile));
    expect(tileRect.height, 56.0);

    await tester.pumpWidget(const MaterialApp(
      home: Material(child: Center(child: AboutListTile(dense: true))),
    ));
    tileRect = tester.getRect(find.byType(AboutListTile));
    expect(tileRect.height, 48.0);
  });
492 493 494 495 496 497 498 499 500 501 502 503 504 505 506

  testWidgets('showLicensePage uses nested navigator by default', (WidgetTester tester) async {
    final LicensePageObserver rootObserver = LicensePageObserver();
    final LicensePageObserver nestedObserver = LicensePageObserver();

    await tester.pumpWidget(MaterialApp(
      navigatorObservers: <NavigatorObserver>[rootObserver],
      initialRoute: '/',
      onGenerateRoute: (_) {
        return PageRouteBuilder<dynamic>(
          pageBuilder: (_, __, ___) => Navigator(
            observers: <NavigatorObserver>[nestedObserver],
            onGenerateRoute: (RouteSettings settings) {
              return PageRouteBuilder<dynamic>(
                pageBuilder: (BuildContext context, _, __) {
507
                  return ElevatedButton(
508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524
                    onPressed: () {
                      showLicensePage(
                        context: context,
                        applicationName: 'A',
                      );
                    },
                    child: const Text('Show License Page'),
                  );
                },
              );
            },
          ),
        );
      },
    ));

    // Open the dialog.
525
    await tester.tap(find.byType(ElevatedButton));
526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544

    expect(rootObserver.licensePageCount, 0);
    expect(nestedObserver.licensePageCount, 1);
  });

  testWidgets('showLicensePage uses root navigator if useRootNavigator is true', (WidgetTester tester) async {
    final LicensePageObserver rootObserver = LicensePageObserver();
    final LicensePageObserver nestedObserver = LicensePageObserver();

    await tester.pumpWidget(MaterialApp(
      navigatorObservers: <NavigatorObserver>[rootObserver],
      initialRoute: '/',
      onGenerateRoute: (_) {
        return PageRouteBuilder<dynamic>(
          pageBuilder: (_, __, ___) => Navigator(
            observers: <NavigatorObserver>[nestedObserver],
            onGenerateRoute: (RouteSettings settings) {
              return PageRouteBuilder<dynamic>(
                pageBuilder: (BuildContext context, _, __) {
545
                  return ElevatedButton(
546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563
                    onPressed: () {
                      showLicensePage(
                        context: context,
                        useRootNavigator: true,
                        applicationName: 'A',
                      );
                    },
                    child: const Text('Show License Page'),
                  );
                },
              );
            },
          ),
        );
      },
    ));

    // Open the dialog.
564
    await tester.tap(find.byType(ElevatedButton));
565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580

    expect(rootObserver.licensePageCount, 1);
    expect(nestedObserver.licensePageCount, 0);
  });

  testWidgets('showAboutDialog uses root navigator by default', (WidgetTester tester) async {
    final AboutDialogObserver rootObserver = AboutDialogObserver();
    final AboutDialogObserver nestedObserver = AboutDialogObserver();

    await tester.pumpWidget(MaterialApp(
      navigatorObservers: <NavigatorObserver>[rootObserver],
      home: Navigator(
        observers: <NavigatorObserver>[nestedObserver],
        onGenerateRoute: (RouteSettings settings) {
          return MaterialPageRoute<dynamic>(
            builder: (BuildContext context) {
581
              return ElevatedButton(
582 583 584 585 586 587 588 589 590 591 592 593 594 595 596
                onPressed: () {
                  showAboutDialog(
                    context: context,
                    applicationName: 'A',
                  );
                },
                child: const Text('Show About Dialog'),
              );
            },
          );
        },
      ),
    ));

    // Open the dialog.
597
    await tester.tap(find.byType(ElevatedButton));
598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613

    expect(rootObserver.dialogCount, 1);
    expect(nestedObserver.dialogCount, 0);
  });

  testWidgets('showAboutDialog uses nested navigator if useRootNavigator is false', (WidgetTester tester) async {
    final AboutDialogObserver rootObserver = AboutDialogObserver();
    final AboutDialogObserver nestedObserver = AboutDialogObserver();

    await tester.pumpWidget(MaterialApp(
      navigatorObservers: <NavigatorObserver>[rootObserver],
      home: Navigator(
        observers: <NavigatorObserver>[nestedObserver],
        onGenerateRoute: (RouteSettings settings) {
          return MaterialPageRoute<dynamic>(
            builder: (BuildContext context) {
614
              return ElevatedButton(
615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630
                onPressed: () {
                  showAboutDialog(
                    context: context,
                    useRootNavigator: false,
                    applicationName: 'A',
                  );
                },
                child: const Text('Show About Dialog'),
              );
            },
          );
        },
      ),
    ));

    // Open the dialog.
631
    await tester.tap(find.byType(ElevatedButton));
632 633 634 635

    expect(rootObserver.dialogCount, 0);
    expect(nestedObserver.dialogCount, 1);
  });
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
  group('showAboutDialog avoids overlapping display features', () {
    testWidgets('default positioning', (WidgetTester tester) async {
      await tester.pumpWidget(MaterialApp(
        builder: (BuildContext context, Widget? child) {
          return MediaQuery(
            // Display has a vertical hinge down the middle
            data: const MediaQueryData(
              size: Size(800, 600),
              displayFeatures: <DisplayFeature>[
                DisplayFeature(
                  bounds: Rect.fromLTRB(390, 0, 410, 600),
                  type: DisplayFeatureType.hinge,
                  state: DisplayFeatureState.unknown,
                ),
              ],
            ),
            child: child!,
          );
        },
        home: Builder(
          builder: (BuildContext context) => ElevatedButton(
            onPressed: () {
              showAboutDialog(
                context: context,
                useRootNavigator: false,
                applicationName: 'A',
              );
            },
            child: const Text('Show About Dialog'),
          ),
        ),
      ));

      // Open the dialog.
      await tester.tap(find.byType(ElevatedButton));
      await tester.pumpAndSettle();

      // By default it should place the dialog on the left screen
      expect(tester.getTopLeft(find.byType(AboutDialog)), Offset.zero);
      expect(tester.getBottomRight(find.byType(AboutDialog)), const Offset(390.0, 600.0));
    });

    testWidgets('positioning using anchorPoint', (WidgetTester tester) async {
      await tester.pumpWidget(MaterialApp(
        builder: (BuildContext context, Widget? child) {
          return MediaQuery(
            // Display has a vertical hinge down the middle
            data: const MediaQueryData(
              size: Size(800, 600),
              displayFeatures: <DisplayFeature>[
                DisplayFeature(
                  bounds: Rect.fromLTRB(390, 0, 410, 600),
                  type: DisplayFeatureType.hinge,
                  state: DisplayFeatureState.unknown,
                ),
              ],
            ),
            child: child!,
          );
        },
        home: Builder(
          builder: (BuildContext context) => ElevatedButton(
            onPressed: () {
              showAboutDialog(
                context: context,
                useRootNavigator: false,
                applicationName: 'A',
                anchorPoint: const Offset(1000, 0),
              );
            },
            child: const Text('Show About Dialog'),
          ),
        ),
      ));

      // Open the dialog.
      await tester.tap(find.byType(ElevatedButton));
      await tester.pumpAndSettle();

      // The anchorPoint hits the right side of the display
      expect(tester.getTopLeft(find.byType(AboutDialog)), const Offset(410.0, 0.0));
      expect(tester.getBottomRight(find.byType(AboutDialog)), const Offset(800.0, 600.0));
    });

    testWidgets('positioning using Directionality', (WidgetTester tester) async {
      await tester.pumpWidget(MaterialApp(
        builder: (BuildContext context, Widget? child) {
          return MediaQuery(
            // Display has a vertical hinge down the middle
            data: const MediaQueryData(
              size: Size(800, 600),
              displayFeatures: <DisplayFeature>[
                DisplayFeature(
                  bounds: Rect.fromLTRB(390, 0, 410, 600),
                  type: DisplayFeatureType.hinge,
                  state: DisplayFeatureState.unknown,
                ),
              ],
            ),
            child: Directionality(
              textDirection: TextDirection.rtl,
              child: child!,
            ),
          );
        },
        home: Builder(
          builder: (BuildContext context) => ElevatedButton(
            onPressed: () {
              showAboutDialog(
                context: context,
                useRootNavigator: false,
                applicationName: 'A',
              );
            },
            child: const Text('Show About Dialog'),
          ),
        ),
      ));

      // Open the dialog.
      await tester.tap(find.byType(ElevatedButton));
      await tester.pumpAndSettle();

      // Since this is rtl, the first screen is the on the right
      expect(tester.getTopLeft(find.byType(AboutDialog)), const Offset(410.0, 0.0));
      expect(tester.getBottomRight(find.byType(AboutDialog)), const Offset(800.0, 600.0));
    });
  });

766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784
  testWidgets("AboutListTile's child should not be offset when the icon is not specified.", (WidgetTester tester) async {
    await tester.pumpWidget(
      const MaterialApp(
        home: Scaffold(
          body: AboutListTile(
            child: Text('About'),
          ),
        ),
      ),
    );

    expect(
      find.descendant(
        of: find.byType(AboutListTile),
        matching: find.byType(Icon),
      ),
      findsNothing,
    );
  });
785 786 787 788 789 790 791 792

  testWidgets("AboutDialog's contents are scrollable", (WidgetTester tester) async {
    final Key contentKey = UniqueKey();
    await tester.pumpWidget(MaterialApp(
      home: Navigator(
        onGenerateRoute: (RouteSettings settings) {
          return MaterialPageRoute<dynamic>(
            builder: (BuildContext context) {
793
              return ElevatedButton(
794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832
                onPressed: () {
                  showAboutDialog(
                    context: context,
                    useRootNavigator: false,
                    applicationName: 'A',
                    children: <Widget>[
                      Container(
                        key: contentKey,
                        color: Colors.orange,
                        height: 500,
                      ),
                    ],
                  );
                },
                child: const Text('Show About Dialog'),
              );
            },
          );
        },
      ),
    ));

    await tester.tap(find.text('Show About Dialog'));
    await tester.pumpAndSettle();

    // Try dragging by the [AboutDialog]'s title.
    RenderBox box = tester.renderObject(find.text('A'));
    Offset originalOffset = box.localToGlobal(Offset.zero);
    await tester.drag(find.byKey(contentKey), const Offset(0.0, -20.0));

    expect(box.localToGlobal(Offset.zero), equals(originalOffset.translate(0.0, -20.0)));

    // Try dragging by the additional children in contents.
    box = tester.renderObject(find.byKey(contentKey));
    originalOffset = box.localToGlobal(Offset.zero);
    await tester.drag(find.byKey(contentKey), const Offset(0.0, -20.0));

    expect(box.localToGlobal(Offset.zero), equals(originalOffset.translate(0.0, -20.0)));
  });
833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853

  testWidgets("LicensePage's color must be same whether loading or done", (WidgetTester tester) async {
    const Color scaffoldColor = Color(0xFF123456);
    const Color cardColor = Color(0xFF654321);

    await tester.pumpWidget(MaterialApp(
      theme: ThemeData.light().copyWith(
        scaffoldBackgroundColor: scaffoldColor,
        cardColor: cardColor,
      ),
      home: Scaffold(
        body: Center(
          child: Builder(
            builder: (BuildContext context) => GestureDetector(
              child: const Text('Show licenses'),
              onTap: () {
                showLicensePage(
                  context: context,
                  applicationName: 'MyApp',
                  applicationVersion: '1.0.0',
                );
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
            ),
          ),
        ),
      ),
    ));

    await tester.tap(find.text('Show licenses'));
    await tester.pump();
    await tester.pump();

    // Check color when loading.
    final List<Material> materialLoadings = tester.widgetList<Material>(find.byType(Material)).toList();
    expect(materialLoadings.length, equals(4));
    expect(materialLoadings[1].color, scaffoldColor);
    expect(materialLoadings[2].color, cardColor);

    await tester.pumpAndSettle();

    // Check color when done.
    expect(find.byKey(const ValueKey<ConnectionState>(ConnectionState.done)), findsOneWidget);
    final List<Material> materialDones = tester.widgetList<Material>(find.byType(Material)).toList();
    expect(materialDones.length, equals(3));
    expect(materialDones[0].color, scaffoldColor);
    expect(materialDones[1].color, cardColor);
  });
880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901

  testWidgets('Conflicting scrollbars are not applied by ScrollBehavior to _PackageLicensePage', (WidgetTester tester) async {
    // Regression test for https://github.com/flutter/flutter/issues/83819
    LicenseRegistry.addLicense(() {
      return Stream<LicenseEntry>.fromIterable(<LicenseEntry>[
        const LicenseEntryWithLineBreaks(<String>['AAA'], 'BBB'),
      ]);
    });

    await tester.pumpWidget(
      const MaterialApp(
        home: Center(
          child: LicensePage(),
        ),
      ),
    );
    await tester.pumpAndSettle();

    // Check for packages.
    expect(find.text('AAA'), findsOneWidget);
    // Check license is displayed after entering into license page for 'AAA'.
    await tester.tap(find.text('AAA'));
902
    await tester.pumpAndSettle();
903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923

    // The inherited ScrollBehavior should not apply Scrollbars since they are
    // already built in to the widget.
    switch (debugDefaultTargetPlatformOverride) {
      case TargetPlatform.android:
      case TargetPlatform.fuchsia:
      case TargetPlatform.linux:
      case TargetPlatform.macOS:
      case TargetPlatform.windows:
        expect(find.byType(CupertinoScrollbar), findsNothing);
        break;
      case TargetPlatform.iOS:
        expect(find.byType(CupertinoScrollbar), findsOneWidget);
        break;
      case null:
        break;
    }
    expect(find.byType(Scrollbar), findsOneWidget);
    expect(find.byType(RawScrollbar), findsNothing);

  }, variant: TargetPlatformVariant.all());
924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999

  testWidgets('LicensePage padding', (WidgetTester tester) async {
    const FlutterLogo logo = FlutterLogo();

    await tester.pumpWidget(
      const MaterialApp(
        title: 'Pirate app',
        home: Center(
          child: LicensePage(
            applicationName: 'LicensePage test app',
            applicationIcon: logo,
            applicationVersion: '0.1.2',
            applicationLegalese: 'I am the very model of a modern major general.',
          ),
        ),
      ),
    );

    final Finder appName = find.text('LicensePage test app');
    final Finder appIcon = find.byType(FlutterLogo);
    final Finder appVersion = find.text('0.1.2');
    final Finder appLegalese = find.text('I am the very model of a modern major general.');
    final Finder appPowered = find.text('Powered by Flutter');

    expect(appName, findsOneWidget);
    expect(appIcon, findsOneWidget);
    expect(appVersion, findsOneWidget);
    expect(appLegalese, findsOneWidget);
    expect(appPowered, findsOneWidget);

    // Bottom padding is applied to the app version and app legalese text.
    final double appNameBottomPadding = tester.getTopLeft(appIcon).dy - tester.getBottomLeft(appName).dy;
    expect(appNameBottomPadding, 0.0);

    final double appIconBottomPadding = tester.getTopLeft(appVersion).dy - tester.getBottomLeft(appIcon).dy;
    expect(appIconBottomPadding, 0.0);

    final double appVersionBottomPadding = tester.getTopLeft(appLegalese).dy - tester.getBottomLeft(appVersion).dy;
    expect(appVersionBottomPadding, 18.0);

    final double appLegaleseBottomPadding = tester.getTopLeft(appPowered).dy - tester.getBottomLeft(appLegalese).dy;
    expect(appLegaleseBottomPadding, 18.0);
  });

  testWidgets('LicensePage has no extra padding between app icon and app powered text', (WidgetTester tester) async {
    // This is a regression test for https://github.com/flutter/flutter/issues/99559

    const FlutterLogo logo = FlutterLogo();

    await tester.pumpWidget(
      const MaterialApp(
        title: 'Pirate app',
        home: Center(
          child: LicensePage(
            applicationIcon: logo,
          ),
        ),
      ),
    );

    final Finder appName = find.text('LicensePage test app');
    final Finder appIcon = find.byType(FlutterLogo);
    final Finder appVersion = find.text('0.1.2');
    final Finder appLegalese = find.text('I am the very model of a modern major general.');
    final Finder appPowered = find.text('Powered by Flutter');

    expect(appName, findsNothing);
    expect(appIcon, findsOneWidget);
    expect(appVersion, findsNothing);
    expect(appLegalese, findsNothing);
    expect(appPowered, findsOneWidget);

    // Padding between app icon and app powered text.
    final double appIconBottomPadding = tester.getTopLeft(appPowered).dy - tester.getBottomLeft(appIcon).dy;
    expect(appIconBottomPadding, 18.0);
  });
1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017

  testWidgets('Error handling test', (WidgetTester tester) async {
    LicenseRegistry.addLicense(() => Stream<LicenseEntry>.error(Exception('Injected failure')));
    await tester.pumpWidget(const MaterialApp(home: Material(child: AboutListTile())));
    await tester.tap(find.byType(ListTile));
    await tester.pump();
    await tester.pump(const Duration(seconds: 2));
    await tester.tap(find.text('VIEW LICENSES'));
    await tester.pump();
    await tester.pump(const Duration(seconds: 2));
    final Finder finder = find.byWidgetPredicate((Widget widget) => widget.runtimeType.toString() == '_PackagesView');
    // force the stream to complete (has to be done in a runAsync block since it's areal async process)
    await tester.runAsync(() => (tester.firstState(finder) as dynamic).licenses as Future<dynamic>); // ignore: avoid_dynamic_calls
    expect(tester.takeException().toString(), 'Exception: Injected failure');
    await tester.pumpAndSettle();
    expect(tester.takeException().toString(), 'Exception: Injected failure');
    expect(find.text('Exception: Injected failure'), findsOneWidget);
  });
1018 1019 1020 1021 1022
}

class FakeLicenseEntry extends LicenseEntry {
  FakeLicenseEntry();

1023 1024
  bool get packagesCalled => _packagesCalled;
  bool _packagesCalled = false;
1025 1026

  @override
1027
  Iterable<LicenseParagraph> paragraphs = <LicenseParagraph>[];
1028 1029

  @override
1030 1031 1032
  Iterable<String> get packages {
    _packagesCalled = true;
    return <String>[];
1033
  }
1034
}
1035 1036 1037 1038 1039

class LicensePageObserver extends NavigatorObserver {
  int licensePageCount = 0;

  @override
1040
  void didPush(Route<dynamic> route, Route<dynamic>? previousRoute) {
1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051
    if (route is MaterialPageRoute<dynamic>) {
      licensePageCount++;
    }
    super.didPush(route, previousRoute);
  }
}

class AboutDialogObserver extends NavigatorObserver {
  int dialogCount = 0;

  @override
1052
  void didPush(Route<dynamic> route, Route<dynamic>? previousRoute) {
1053
    if (route is DialogRoute) {
1054 1055 1056 1057 1058
      dialogCount++;
    }
    super.didPush(route, previousRoute);
  }
}