def test_repr(self, Hargs, ref):
"""Test __repr__ printout."""
H = TransferFunction(*Hargs)
assert repr(H) == ref
# and reading back
array = np.array # noqa
H2 = eval(H.__repr__())
for p in range(len(H.num)):
for m in range(len(H.num[0])):
np.testing.assert_array_almost_equal(H.num[p][m], H2.num[p][m])
np.testing.assert_array_almost_equal(H.den[p][m], H2.den[p][m])
assert H.dt == H2.dt
