filter left==right warning

Author: jenshnielsen

lib/matplotlib/tests/test_dates.py

@@ -3,6 +3,7 @@
 from matplotlib.testing.decorators import image_comparison, knownfailureif, cleanup
 import matplotlib.pyplot as plt
 from nose.tools import assert_raises
+import warnings
 
 @image_comparison(baseline_images=['date_empty'])
 def test_date_empty():
@@ -68,6 +69,7 @@ def test_too_many_date_ticks():
     # setting equal datetimes triggers and expander call in
     # transforms.nonsingular which results in too many ticks in the
     # DayLocator.  This should trigger a Locator.MAXTICKS RuntimeError
+    warnings.filterwarnings('ignore','Attempting to set identical left==right results\\nin singular transformations; automatically expanding.\\nleft=\d*\.\d*, right=\d*\.\d*',UserWarning,module='matplotlib.axes')
     t0 = datetime.datetime(2000, 1, 20)
     tf = datetime.datetime(2000, 1, 20)
     fig = plt.figure()