Ignore MatplotlibDeprecationWarnings when setting up test rcParams.

anntzer · anntzer · commit 435a86011552 · 2018-05-30T21:37:12.000-07:00
Otherwise, rcParams cannot be deprecated without spamming stderr with
one warning per test.
diff --git a/lib/matplotlib/testing/__init__.py b/lib/matplotlib/testing/__init__.py
@@ -3,6 +3,7 @@
 
 import matplotlib as mpl
 from matplotlib import cbook
+from matplotlib.cbook import MatplotlibDeprecationWarning
 
 
 def is_called_from_pytest():
@@ -38,10 +39,11 @@ def setup():
 
     mpl.use('Agg', warn=False)  # use Agg backend for these tests
 
-    # These settings *must* be hardcoded for running the comparison
-    # tests and are not necessarily the default values as specified in
-    # rcsetup.py
-    mpl.rcdefaults()  # Start with all defaults
+    # These settings *must* be hardcoded for running the comparison tests and
+    # are not necessarily the default values as specified in rcsetup.py
+    with warnings.catch_warnings():
+        warnings.simplefilter("ignore", MatplotlibDeprecationWarning)
+        mpl.rcdefaults()  # Start with all defaults
 
     set_font_settings_for_testing()
     set_reproducibility_for_testing()
diff --git a/lib/matplotlib/testing/conftest.py b/lib/matplotlib/testing/conftest.py
@@ -1,7 +1,10 @@
+import warnings
+
 import pytest
 
 import matplotlib
 from matplotlib import cbook
+from matplotlib.cbook import MatplotlibDeprecationWarning
 
 
 def pytest_configure(config):
@@ -41,7 +44,9 @@ def mpl_test_settings(request):
             # default backend prematurely.
             import matplotlib.pyplot as plt
             plt.switch_backend(backend)
-        matplotlib.style.use(style)
+        with warnings.catch_warnings():
+            warnings.simplefilter("ignore", MatplotlibDeprecationWarning)
+            matplotlib.style.use(style)
         try:
             yield
         finally:
