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14 Commits (6bf5148ffc6f968c4b98151fbf08075e973b3b7c)

Author SHA1 Message Date
Tyler Goodlet a6b249cd52 Forkserver just can't seem to cut it... 2020-01-26 23:17:06 -05:00
Tyler Goodlet ecced3d09a Allow choosing the spawn backend per test session
Add a `--spawn-backend` option which can be set to one of {'mp',
'trio_run_in_process'} which will either run the test suite using the
`multiprocessing` or `trio-run-in-process` backend respectively.
Currently trying to run both in the same session can result in hangs
seemingly due to a lack of cleanup of forkservers / resource trackers
from `multiprocessing` which cause broken pipe errors on occasion (no
idea on the details).

For `test_cancellation.py::test_nested_multierrors`, use less nesting
when mp is used since it breaks if we push it too hard with the
whole recursive subprocess spawning thing...
2020-01-26 21:36:08 -05:00
Tyler Goodlet 783fe53b06 Don't mix trip with multiprocessing for now
It seems that mixing the two backends in the test suite results in hangs
due to lingering forkservers and resource managers from
`multiprocessing`? Likely we'll need either 2 separate CI runs to work
or someway to be sure that these lingering servers are killed in between
tests.
2020-01-24 00:55:40 -05:00
Tyler Goodlet 915bf17a9a Add process tree depth control to nested multierror test
Another step toward having a complete test for #89.
Subactor breadth still seems to cause the most havoc and is why I've
kept that value to just 2 for now.
2019-11-25 12:05:15 -05:00
Tyler Goodlet 2d4b6de4f4 Spawn even less suba-actors in Windows CI
Seems like we've probably got some greater limitations
with Windows and "nested" spawned sub-processes...
2019-11-22 21:23:25 -05:00
Tyler Goodlet 6d9ac53bd5 Add nested multierror testing
Add a test to verify that `trio.MultiError`s are properly propagated up
a simple actor nursery tree. We don't have any exception marshalling
between processes (yet) so we can't validate much more then a simple
2-depth tree. This satisfies the final bullet in #43.

Note I've limited the number of subactors per layer to around 5 since
any more then this seems to break the `multiprocessing` forkserver;
zombie subprocesses seem to be blocking teardown somehow...

Also add a single depth fast fail test just to verify that it's the
nested spawning that triggers this forkserver bug.
2019-10-30 00:30:40 -04:00
Tyler Goodlet d406383cd3 Add a preliminary nested subactor `MultiError` test
This exemplifies the undefined behaviour in #88 and begins to test for
the last bullet in #43.
2019-10-26 15:04:13 -04:00
Tyler Goodlet 6dbb3f7ae6 Extend cancellation tests
In an effort towards #43. This completes the first major bullet's worth of tests
described in that issue.
2019-10-26 09:55:07 -04:00
Tyler Goodlet b70f4eafcb Flip tests to use `start_method` kwarg 2019-03-08 20:06:16 -05:00
Tyler Goodlet d6ca722bcc Sprinkle `spawn_method` fixture throughout tests 2019-03-06 00:37:02 -05:00
Tyler Goodlet a482681f9c Leverage `pytest.raises()` better; fix a bunch of docs 2018-11-22 11:43:04 -05:00
Tyler Goodlet 3e74cc6f11 Verify nested boxed errors 2018-11-19 16:53:21 -05:00
Tyler Goodlet 9102c48810 Add multierror cancellation tests 2018-11-19 14:16:42 -05:00
Tyler Goodlet 51076ebb5c Break cancellation tests into new module 2018-09-02 11:51:58 -04:00