libct/int: make TestFdLeaks more robust #3735
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Now, this should also hopefully fix the flakiness observed in #3721 (comment) |
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This is to de-duplicate the code that checks that err is nil and that the exit code is zero. Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
The purpose of this test is to check that there are no extra file descriptors left open after repeated calls to runContainer. In fact, the first call to runContainer leaves a few file descriptors opened, and this is by design. Previously, this test relied on two things: 1. some other tests were run before it (and thus all such opened-once file descriptors are already opened); 2. explicitly excluding fd opened to /sys/fs/cgroup. Now, if we run this test separately, it will fail (because of 1 above). The same may happen if the tests are run in a random order. To fix this, add a container run before collection the initial fd list, so those fds that are opened once are included and won't be reported. Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
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AkihiroSuda
approved these changes
Feb 24, 2023
mrunalp
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Mar 20, 2023
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The purpose of this test is to check that there are no extra file
descriptors left open after repeated calls to runContainer. In fact,
the first call to runContainer leaves a few file descriptors opened,
and this is by design.
Previously, this test relied on two things:
file descriptors are already opened);
Now, if we run this test separately, it will fail (because of 1 above).
The same may happen if the tests are run in a random order.
To fix this, add a container run before collection the initial fd list,
so those fds that are opened once are included and won't be reported.
(plus some minor refactoring commits)