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Better explanation.

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This commit is contained in:
Itamar Turner-Trauring 2022-11-23 09:53:07 -05:00
parent 4fd92a915b
commit 7f1d7d4f46
1 changed files with 9 additions and 3 deletions
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12
src/allmydata/test/common_system.py
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@ -643,10 +643,16 @@ def _render_section_values(values):
@async_to_deferred
async def spin_until_cleanup_done(value=None, timeout=10):
"""
At the end of the test, spin until either a timeout is hit, or the reactor
has no more DelayedCalls.
At the end of the test, spin until the reactor has no more DelayedCalls
and file descriptors (or equivalents) registered. This prevents dirty
reactor errors, while also not hard-coding a fixed amount of time, so it
can finish faster on faster computers.
Make sure to register during setUp.
There is also a timeout: if it takes more than 10 seconds (by default) for
the remaining reactor state to clean itself up, the presumption is that it
will never get cleaned up and the spinning stops.
Make sure to run as last thing in tearDown.
"""
def num_fds():
if hasattr(reactor, "handles"):