#33213: Document coverage setup for parallel tests
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Reporter: Mr. Glass | Owner: nobody
Type: New feature | Status: new
Component: Documentation | Version:
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by Adam Johnson):
Coverage.py documents [https://coverage.readthedocs.io/en/latest/cmd.html
#cmd-run for 'run']:
> Coverage.py can measure multi-threaded programs by default. If you are
using more exotic concurrency, with the multiprocessing, greenlet,
eventlet, or gevent libraries, then coverage.py will get very confused.
Use the --concurrency switch to properly measure programs using these
libraries. Give it a value of multiprocessing, thread, greenlet, eventlet,
or gevent. Values other than thread require the C extension.
Plus it has a whole page on the topic:
https://coverage.readthedocs.io/en/latest/subprocess.html
I've found `--concurrency=multiprocessing` works fine.
Not sure Django needs to doc anything considering it's really extensively
documented there.
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Ticket URL: <https://code.djangoproject.com/ticket/33213#comment:3>
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