test that drss returns a discrete time system with undefined time step

bnavigator · bnavigator · commit 98a08b60cba1 · 2021-03-24T22:35:29.000+01:00
diff --git a/control/tests/statesp_test.py b/control/tests/statesp_test.py
@@ -884,6 +884,7 @@ def test_shape(self, states, outputs, inputs):
         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))
