[jira] [Updated] (CASSANDRA-16622) Remove references to run_dtests from README

["Brandon Williams (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-16622?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Brandon Williams updated CASSANDRA-16622:
-----------------------------------------
    Resolution: Duplicate
        Status: Resolved  (was: Triage Needed)

> Remove references to run_dtests from README
> -------------------------------------------
>
>                 Key: CASSANDRA-16622
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16622
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Test/dtest/python
>            Reporter: Matt Fleming
>            Priority: Normal
>
> Newcomers to cassandra-dtest that look through README.md will see that the run_dtests.py script is the quickest way to get started running tests. Unfortunately, the script has a number of problems and I'm not sure it ever work properly after the move to the pytest framework.
> h2. Process stdout/stderr buffering
> Firstly, when I execute run_dtests.py I don't see any output after
> $ ./run_dtests.py --dtest-tests paging_test.py 
> ============================= test session starts ==============================
> This looks likely to be because of the buffering that pytest does internally for stdout and stderr and because of the way that it's executed by run_dtests.py, i.e. I suspect that run_dtests.py is blocked on the following line for most of the execution because there's no data available in the pipe for stderr:
> stderr_output = sp.stderr.readline()
> See also pytest-dev/pytest#1886
> h2. --pytest-options doesn't work
> Secondly, the options specified in --pytest-options aren't actually passed through to pytest. I ran into this when trying to get more output during the execution of run_dtests.py (see above).
> h2. Most devs run pytest directly
> When I spoke to @ekaterinadimitrova2 it seemed like most developers just run the tests directly with pytest which would explain why run_dtests.py has bitrotted.



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