def test_add_inconsistent_dimension(self):
"""Add two transfer function matrices of different sizes."""
sys1 = TransferFunction([[[1., 2.]]], [[[4., 5.]]])
sys2 = TransferFunction([[[4., 3.]], [[1., 2.]]],
[[[1., 6.]], [[2., 4.]]])
with pytest.raises(ValueError):
sys1.__add__(sys2)
with pytest.raises(ValueError):
sys1.__sub__(sys2)
with pytest.raises(ValueError):
sys1.__radd__(sys2)
with pytest.raises(ValueError):
sys1.__rsub__(sys2)
