filter known FutureWarning's from unit tests

control/tests/matlab_test.py

@@ -83,6 +83,7 @@ class tsystems:
 
 
 @pytest.mark.usefixtures("fixedseed")
+@pytest.mark.filterwarnings("ignore::FutureWarning")
 class TestMatlab:
     """Test matlab style functions"""
 

control/tests/robust_test.py

@@ -48,6 +48,7 @@ class TestH2:
         np.testing.assert_array_almost_equal(k.D, [[0]])
 
 
+@pytest.mark.filterwarnings("ignore:connect:FutureWarning")
 class TestAugw:
 
     # tolerance for system equality
@@ -324,6 +325,7 @@ class TestAugw:
             augw(g1by1, w3=g2by2)
 
 
+@pytest.mark.filterwarnings("ignore:connect:FutureWarning")
 class TestMixsyn:
     """Test control.robust.mixsyn"""
 

control/tests/sisotool_test.py

@@ -153,6 +153,7 @@ class TestSisotool:
         with pytest.warns(FutureWarning):
             sisotool(tsys, kvect=1.2)
 
+    @pytest.mark.filterwarnings("ignore:connect:FutureWarning")
     def test_sisotool_mimo(self,  sys222, sys221):
         # a 2x2 should not raise an error:
         sisotool(sys222)
@@ -196,6 +197,7 @@ class TestPidDesigner:
         {'input_signal':'r', 'Kp0':0.01, 'derivative_in_feedback_path':True},
         {'input_signal':'d', 'Kp0':0.01, 'derivative_in_feedback_path':True},
         {'input_signal':'r', 'Kd0':0.01, 'derivative_in_feedback_path':True}])
+    @pytest.mark.filterwarnings("ignore:connect:FutureWarning")
     def test_pid_designer_2(self, plant, kwargs):
         rootlocus_pid_designer(plant, **kwargs)