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author | Ned Batchelder <ned@nedbatchelder.com> | 2021-12-11 09:12:02 -0500 |
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committer | Ned Batchelder <ned@nedbatchelder.com> | 2021-12-11 09:12:02 -0500 |
commit | dff1ff4751e8b272457e5aba7934f69394c3382b (patch) | |
tree | a3ff192eaf1882ef0474e7559785d40a3d649857 | |
parent | 157053d54c55ccf95d8911737bfa0a881e973e93 (diff) | |
download | python-coveragepy-git-dff1ff4751e8b272457e5aba7934f69394c3382b.tar.gz |
docs: more description in balance_xdist_plugin.py
-rw-r--r-- | tests/balance_xdist_plugin.py | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/tests/balance_xdist_plugin.py b/tests/balance_xdist_plugin.py index 6786a342..e4db6f63 100644 --- a/tests/balance_xdist_plugin.py +++ b/tests/balance_xdist_plugin.py @@ -2,10 +2,26 @@ # For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt """ -A pytest plugin to record test times and then balance xdist with them next time. +A pytest plugin to record test times and then use those times to divide tests +into evenly balanced workloads for each xdist worker. + +Two things are hard-coded here that shouldn't be: + +- The timing data is written to the tmp directory, but should use the pytest + cache (https://docs.pytest.org/en/latest/how-to/cache.html). + +- The number of xdist workers is hard-coded to 8 because I couldn't figure out + how to find the number. Would it be crazy to read the -n argument directly? + +You can force some tests to run on the same worker by setting the +`balanced_clumps` setting in your pytest config file. Each line is a substring +of a test name. All tests with that substring (like -k) will run on the +worker: + + balanced_clumps = + LongRunningFixture + some_other_test_substring -The only thing in here particular to coverage.py is the use of the tmp directory -for storing the data. """ import collections |