ByteSourceFactory sliced = SourceSinkFactories.asSlicedByteSourceFactory(factory, off, len);
      suite.addTest(suiteForBytes(sliced, bytes, name + ".slice[long, long]", desc, false));

      // test a slice() of the ByteSource starting at a random offset with a length of
      // Long.MAX_VALUE
      ByteSourceFactory slicedLongMaxValue =
          SourceSinkFactories.asSlicedByteSourceFactory(factory, off, Long.MAX_VALUE);
      suite.addTest(

      }

      @Override
      public void tearDown() throws IOException {
        factory.tearDown();
      }
    };
  }

  public static ByteSourceFactory asSlicedByteSourceFactory(
      final ByteSourceFactory factory, final long off, final long len) {
    checkNotNull(factory);
    return new ByteSourceFactory() {
      @Override

      }

      @Override
      public void tearDown() throws IOException {
        factory.tearDown();
      }
    };
  }

  public static ByteSourceFactory asSlicedByteSourceFactory(
      final ByteSourceFactory factory, final long off, final long len) {
    checkNotNull(factory);
    return new ByteSourceFactory() {
      @Override