MNT: use functools.wraps in decorator out of mild paranoia

tacaswell · tacaswell · commit a4bd0c53b76e · 2020-04-20T15:01:04.000-04:00
Concern is that pytest may use the __name__ in the decorated function
as part of test discovery.  This does not seem to currently be true,
but just in case, use `functools.wraps` to copy the name over.
diff --git a/lib/matplotlib/tests/test_dates.py b/lib/matplotlib/tests/test_dates.py
@@ -4,6 +4,7 @@
 import dateutil.rrule
 import numpy as np
 import pytest
+import functools
 
 from matplotlib import rc_context
 import matplotlib.dates as mdates
@@ -160,6 +161,7 @@ def test_too_many_date_ticks(caplog):
 
 
 def _new_epoch_decorator(thefunc):
+    @functools.wraps(thefunc)
     def wrapper():
         mdates._reset_epoch_test_example()
         mdates.set_epoch('2000-01-01')
