def test_s_lossy_line(self):
        """
        Lossy transmission line of characteristic impedance Z0, length l
        and propagation constant gamma = alpha + j beta

        ○---------○

        ○---------○

        has ABCD matrix of the form:

        [ cosh(gamma l)       Z0 sinh(gamma l) ]
        [ 1/Z0 sinh(gamma l)  cosh(gamma l) ]
        """