Fix warning check for python 2.7

murrayrm · murrayrm · commit 55f4bb6056b9 · 2018-02-24T16:34:49.000-08:00
Python 2.7 represses repeated warnings in a way that causes the unit test
to fail =&gt; make sure that warnings are always generated
diff --git a/control/tests/freqresp_test.py b/control/tests/freqresp_test.py
@@ -139,6 +139,7 @@ def test_discrete(self):
 
          # Check for warning if frequency is out of range
          import warnings
+         warnings.simplefilter('always', UserWarning)   # don't supress
          with warnings.catch_warnings(record=True) as w:
             omega_bad = np.linspace(10e-4,1.1,10) * np.pi/sys.dt
             ret = sys.freqresp(omega_bad)
