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)
def test_size_mismatch(self):
"""Test size mismacht"""
sys1 = ss2tf(rss(2, 2, 2))
# Different number of inputs
sys2 = ss2tf(rss(3, 1, 2))
with pytest.raises(ValueError):
TransferFunction.__add__(sys1, sys2)
# Different number of outputs
sys2 = ss2tf(rss(3, 2, 1))
with pytest.raises(ValueError):
TransferFunction.__add__(sys1, sys2)
# Inputs and outputs don't match
with pytest.raises(ValueError):
TransferFunction.__mul__(sys2, sys1)
# Feedback mismatch (MIMO not implemented)
with pytest.raises(NotImplementedError):
TransferFunction.feedback(sys2, sys1)
