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cacheprovider: set: use json.dumps + write #6206

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merged 1 commit into from
Nov 16, 2019
Merged

cacheprovider: set: use json.dumps + write #6206

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1 change: 1 addition & 0 deletions changelog/6206.improvement.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
cacheprovider: improved robustness and performance with ``cache.set``.
3 changes: 2 additions & 1 deletion src/_pytest/cacheprovider.py
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Original file line number Diff line number Diff line change
Expand Up @@ -125,13 +125,14 @@ def set(self, key, value):
return
if not cache_dir_exists_already:
self._ensure_supporting_files()
data = json.dumps(value, indent=2, sort_keys=True)
try:
f = path.open("w")
except (IOError, OSError):
self.warn("cache could not write path {path}", path=path)
else:
with f:
json.dump(value, f, indent=2, sort_keys=True)
f.write(data)

def _ensure_supporting_files(self):
"""Create supporting files in the cache dir that are not really part of the cache."""
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