Wait for file events to propagated for slower Listen backends. #26829

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merged 1 commit into from Oct 19, 2016

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@headius
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headius commented Oct 19, 2016

Summary

The tests for filesystem events ("checker" or "listen") do not wait for the Listen event loop to catch up with changes. This patch adds the waits, so they'll run green on platforms where Listen has some delay.

Other Information

On JRuby, the listen library does not have access to synchronous filesystem events, a la rb_fsevent and similar libraries. Instead, it uses a listen loop that may introduce some delay after filesystem changes before an event is fired. Other tests here used wait to wait for those changes to propagate, so I added the same wait to the remaining tests. With this change, these tests are green on JRuby.

@headius headius Wait for file events to propagated for slower Listen backends.
Listen, when used on JRuby, does have have access to synchronous
filesystem events. Instead, it uses a listen loop which has some
delay in registering filesystem changes. These tests checked for
events to have fired immediately after making filesystem changes,
which did not allow time for that listen loop to trigger. I added
`wait` to each test, as a few already did, to ensure the events
fire. With these changes, the tests are all green on JRuby.
045d649
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@tenderlove tenderlove merged commit 94a14a3 into rails:5-0-stable Oct 19, 2016

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@headius headius deleted the headius:wait_for_events_in_listen_tests branch Oct 19, 2016
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