anchor.diff:    1, 0, 0, 0, 1, 8, 6, 0, 0, 0, 31, 21, 196, 137, 0, 0, 0, 11, 73, 68, 65, 84,
     120, 1, 99, 97, 0, 2, 0, 0, 25, 0, 5, 144, 240, 54, 245, 0, 0, 0, 0, 73, 69,
     78, 68, 174, 66, 96, 130];
  -
  -// 1x1 colored pixel
  -const List<int> _kFailPngBytes =
  -<int>[137, 80, 78, 71, 13, 10, 26, 10, 0, 0, 0, 13, 73, 72, 68, 82, 0, 0, 0,
  -  1, 0, 0, 0, 1, 8, 6, 0, 0, 0, 31, 21, 196, 137, 0, 0, 0, 13, 73, 68, 65, 84,
  -  120, 1, 99, 249, 207, 240, 255, 63, 0, 7, 18, 3, 2, 164, 147, 160, 197, 0,
  -  0, 0, 0, 73, 69, 78, 68, 174, 66, 96, 130];
   
   void main() {
     late MemoryFileSystem fs;
  
positive.code:           baseDirectory: fakeDirectory,
          );
          expect(comparator.runtimeType, FlutterSkippingFileComparator);
        });
      });
    });
  
negative.code:         );
        });
  
        test('returns FlutterSkippingGoldenFileComparator when network connection is unavailable', () async {
          final FakeDirectory fakeDirectory = FakeDirectory();
          fakeDirectory.existsSyncValue = true;
  