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Don't fail tests if cairo dependency is not installed. #12835

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Merged
merged 2 commits into from
Nov 20, 2018
Merged

Don't fail tests if cairo dependency is not installed. #12835

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8960629
Don't fail tests if cairo dependency is not installed.
anntzer Nov 19, 2018
2e1ef0d
Only skip cairo import errors for testing
timhoffm Nov 20, 2018
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11 changes: 10 additions & 1 deletion lib/matplotlib/testing/conftest.py
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Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,16 @@ def mpl_test_settings(request):
# This import must come after setup() so it doesn't load the
# default backend prematurely.
import matplotlib.pyplot as plt
plt.switch_backend(backend)
try:
plt.switch_backend(backend)
except ImportError as exc:
# Should only occur for the cairo backend tests, if neither
# pycairo nor cairocffi are installed.
if 'cairo' in backend.lower():
pytest.skip("Failed to switch to backend {} ({})."
.format(backend, exc))
else:
raise
with warnings.catch_warnings():
warnings.simplefilter("ignore", MatplotlibDeprecationWarning)
matplotlib.style.use(style)
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