private void Decompress(byte[] compressed, byte[] expected)
        {
            var uncompressed = PictureCompression.Decompress(compressed, 0, compressed.Length, expected.Length);

            uncompressed.Should().BeEquivalentTo(expected);
        }
        public void DecompressNull()
        {
            Action act = () => PictureCompression.Decompress(null, 0, 0, 0);

            act.Should().Throw <ArgumentNullException>();
        }