public void Class_should_be_modified()
        {
            var converter = new DiffSubPieceConverter();
            var result    = converter.Convert(new DiffPiece(string.Empty, ChangeType.Modified), null, null, null);

            result.Should().Be("DiffModifiedPieces");
        }
        public void Class_should_be_empty()
        {
            var converter = new DiffSubPieceConverter();
            var result    = converter.Convert(new DiffPiece(string.Empty, ChangeType.Imaginary), null, null, null);

            result.Should().Be(string.Empty);

            result = converter.Convert(null, null, null, null);
            result.Should().Be(string.Empty);
        }