anchor.diff:        TargetPlatform.linux,
       }),
     );
  +
  +  testWidgets('A sample of icons look as expected', (WidgetTester tester) async {
  +    await _loadIconFont();
  +
  +    await tester.pumpWidget(MaterialApp(
  +      home: IconTheme(
  +        data: const IconThemeData(size: 200),
  +        child: Wrap(
  +          children: const <Icon>[
  +            Icon(Icons.ten_k),
  +            Icon(Icons.ac_unit),
  +            Icon(Icons.local_taxi),
  +            Icon(Icons.local_taxi_outlined),
  +            Icon(Icons.local_taxi_rounded),
  +            Icon(Icons.local_taxi_sharp),
  +            Icon(Icons.zoom_out_sharp),
  +          ],
  +        ),
  +      ),
  +    ));
  +
  +    await expectLater(find.byType(Wrap), matchesGoldenFile('test.icons.sample.png'));
  +  }, skip: isBrowser); // https://github.com/flutter/flutter/issues/39998
   }
  +
  +// Loads the cached material icon font.
  +// Only necessary for golden tests. Relies on the tool updating cached assets before
  +// running tests.
  +Future<void> _loadIconFont() async {
  +  const FileSystem fs = LocalFileSystem();
  +  const Platform platform = LocalPlatform();
  +  final Directory flutterRoot = fs.directory(platform.environment['FLUTTER_ROOT']);
  +
  +  final File iconFont = flutterRoot.childFile(
  +    fs.path.join(
  +      'bin',
  +      'cache',
  +      'artifacts',
  +      'material_fonts',
  +      'MaterialIcons-Regular.otf',
  +    ),
  +  );
  +
  +  final Future<ByteData> bytes = Future<ByteData>.value(
  +      iconFont.readAsBytesSync()
  +      .buffer
  +      .asByteData()
  +  );
  +
  +  await (FontLoader('MaterialIcons')..addFont(bytes)).load();
  +}
  
positive.code:     expect(Icons.access_time_sharp.matchTextDirection, false);
    });
  
    testWidgets('Adaptive icons are correct on cupertino platforms',
          (WidgetTester tester) async {
        expect(Icons.adaptive.arrow_back, Icons.arrow_back_ios);
        expect(Icons.adaptive.arrow_back_outlined, Icons.arrow_back_ios_outlined);
      },
  
negative.code: // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  import 'package:file/file.dart';
  import 'package:file/local.dart';
  import 'package:flutter/material.dart';
  import 'package:flutter/services.dart';
  
  import 'package:flutter_test/flutter_test.dart';
  import 'package:platform/platform.dart';
  
  void main() {
    testWidgets('IconData object test', (WidgetTester tester) async {
  