public void CanSetBits()
{
var buffer = stackalloc byte[16];
var bitsBufffer = new BitsBuffer(buffer, 16);
bitsBufffer.AddValue(12, 6);
bitsBufffer.AddValue(3, 7);
bitsBufffer.AddValue(279, 18);
bitsBufffer.SetBits(6, 7, 7);
int index = 0;
Assert.Equal(12UL, bitsBufffer.ReadValue(ref index, 6));
Assert.Equal(7UL, bitsBufffer.ReadValue(ref index, 7));
Assert.Equal(279UL, bitsBufffer.ReadValue(ref index, 18));
}