def test_strictly_proper(self, strictly_proper):
"""Test that the strictly_proper argument returns a correct D."""
for i in range(100):
# The probability that drss(..., strictly_proper=False) returns an
# all zero D 100 times in a row is 0.5**100 = 7.89e-31
sys = rss(1, 1, 1, strictly_proper=strictly_proper)
if np.all(sys.D == 0.) == strictly_proper:
break
assert np.all(sys.D == 0.) == strictly_proper
def test_latex_repr_testsize(editsdefaults):
# _repr_latex_ returns None when size > maxsize
from control import set_defaults
maxsize = defaults['statesp.latex_maxsize']
nstates = maxsize // 2
ninputs = maxsize - nstates
noutputs = ninputs
assert nstates > 0
assert ninputs > 0
g = rss(nstates, ninputs, noutputs)
assert isinstance(g._repr_latex_(), str)
set_defaults('statesp', latex_maxsize=maxsize - 1)
assert g._repr_latex_() is None
set_defaults('statesp', latex_maxsize=-1)
assert g._repr_latex_() is None
gstatic = ss([], [], [], 1)
assert gstatic._repr_latex_() is None
def test_pole(self, states, outputs, inputs):
"""Test that the poles of rss outputs have a negative real part."""
sys = rss(states, outputs, inputs)
p = sys.poles()
for z in p:
assert z.real < 0
def test_shape(self, states, outputs, inputs):
"""Test that rss outputs have the right state, input, and output size."""
sys = rss(states, outputs, inputs)
assert sys.nstates == states
assert sys.ninputs == inputs
assert sys.noutputs == outputs