Make RTN17 tests resilient to concurrent requests #959
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In the test, we were checking that each fallback host got exactly one request. But that's more than we need to check; we just need to check that all fallback hosts are used, in the fake-random order we set.
That extra strictness was causing the test to fail sometimes, as some request would sneak in during the test and duplicate a fallback host. This is because we first set each fallback host as
rest.prioritizedHost
, then check if it works, so in between that, all requests are sent to that host.I still don't know why did some extra requests happened since I couldn't reproduce this on my machine and we have limited visibility into CI, but the point is, there's no reason why that should affect the test.
Fixes #931.