Files
scylladb/test
Nadav Har'El 200bc82913 test/cql-pytest: exit immediately if Scylla is down
In commit acfa180766 we added to
test/cql-pytest a mechanism to detect when Scylla crashes in the middle
of a test function - in which case we report the culprit test and exit
immediately to avoid having a hundred more tests report that they failed
as well just because Scylla was down.

However, if Scylla was *never* up - e.g., if the user ran "pytest" without
ever running Scylla -  we still report hundreds of tests as having failed,
which is confusing and not helpful.

So with this patch, if a connection cannot be made to Scylla at all,
the test exits immediately, explaining what went wrong, not blaming
any specific test:

    $ pytest
    ...
    ! _pytest.outcomes.Exit: Cannot connect to Scylla at --host=localhost --port=9042 !
    ============================ no tests ran in 0.55s =============================

Beyond being a helpful reminder for a developer who runs "pytest" without
having started Scylla first (or using test/cql-pytest/run or test.py to
start Scylla easily), this patch is also important when running tests
through test.py if it reuses an instance of Scylla that crashed during an
earlier pytest file's run.

This patch does not fix test.py - it can still try to run pytest with
a dead Scylla server without checking. But at least with this patch
pytest will notice this problem immediately and won't report hundreds of
test functions having failed. The only report the user will see will be
the last test which crashed Scylla, which will make it easier to find
this failure without being hidden between hundreds of spurious failures.

Fixes #12360

Signed-off-by: Nadav Har'El <nyh@scylladb.com>

Closes #12401
2022-12-28 13:04:28 +02:00
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