add unit test for input/output/state deprecation warning

murrayrm · murrayrm · commit f633874054a9 · 2021-01-23T10:37:27.000-08:00
diff --git a/control/tests/lti_test.py b/control/tests/lti_test.py
@@ -250,3 +250,14 @@ def test_squeeze_exceptions(self, fcn):
             sys.frequency_response([[0.1, 1], [1, 10]])
             sys([[0.1, 1], [1, 10]])
             evalfr(sys, [[0.1, 1], [1, 10]])
+
+        with pytest.raises(PendingDeprecationWarning, match="LTI `inputs`"):
+            assert sys.inputs == sys.ninputs
+
+        with pytest.raises(PendingDeprecationWarning, match="LTI `outputs`"):
+            assert sys.outputs == sys.noutputs
+
+        if isinstance(sys, ct.StateSpace):
+            with pytest.raises(
+                    PendingDeprecationWarning, match="StateSpace `states`"):
+                assert sys.states == sys.nstates
