added missing unit test

murrayrm · murrayrm · commit b7945f3b39ef · 2021-01-15T08:18:58.000-08:00
diff --git a/control/tests/statesp_test.py b/control/tests/statesp_test.py
@@ -395,6 +395,7 @@ def test_is_static_gain(self):
         D0 = 0
         D1 = np.ones((2,1))
         assert StateSpace(A0, B0, C1, D1).is_static_gain()
+        assert not StateSpace(A1, B0, C1, D1).is_static_gain()
         assert not StateSpace(A0, B1, C1, D1).is_static_gain()
         assert not StateSpace(A1, B1, C1, D1).is_static_gain()
         assert StateSpace(A0, B0, C0, D0).is_static_gain()
