public void Test_RunLengthEncodeDCValues()
        {
            // generate random array
            int[,] input = ArrayHelper.GetTwoDimensionalArrayOfLength(16);
            // do the zick zack
            List <int[]> output = ZickZack.ZickZackSortChannel(input);

            // Action
            var actual = Coefficients.EncodeDCValueDifferences(output);

            DCEncode[] dcStructs = { new DCEncode(0,  -1),
                                     new DCEncode(4,   8),
                                     new DCEncode(7, 120),
                                     new DCEncode(4, 8) };

            List <DCEncode> expected = new List <DCEncode>(dcStructs);

            // Assertion
            actual.Should().BeEquivalentTo(expected);
        }