from control.dtime import sample_system

from control.lti import evalfr

from control.statesp import (StateSpace, _convert_to_statespace, drss,

rss, ss, tf2ss, _statesp_defaults)

rss, ss, tf2ss, _statesp_defaults, _rss_generate)

from control.tests.conftest import ismatarrayout, slycotonly

from control.xferfcn import TransferFunction, ss2tf

for z in p:

assert z.real < 0

@pytest.mark.parametrize('strictly_proper', [True, False])

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

@pytest.mark.parametrize('par, errmatch',

[((-1, 1, 1, 'c'), 'states must be'),

((1, -1, 1, 'c'), 'inputs must be'),

((1, 1, -1, 'c'), 'outputs must be'),

((1, 1, 1, 'x'), 'cdtype must be'),

])

def test_rss_invalid(self, par, errmatch):

"""Test invalid inputs for rss() and drss()."""

with pytest.raises(ValueError, match=errmatch):

_rss_generate(*par)

class TestDrss:

"""These are tests for the proper functionality of statesp.drss."""

assert sys.nstates == states

assert sys.ninputs == inputs

assert sys.noutputs == outputs

assert sys.dt is True

@pytest.mark.parametrize('states', range(1, maxStates))

@pytest.mark.parametrize('outputs', range(1, maxIO))

for z in p:

assert abs(z) < 1

@pytest.mark.parametrize('strictly_proper', [True, False])

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 = drss(1, 1, 1, strictly_proper=strictly_proper)

if np.all(sys.D == 0.) == strictly_proper:

break

assert np.all(sys.D == 0.) == strictly_proper

class TestLTIConverter:

"""Test returnScipySignalLTI method"""