Folks, thanks for your responses! Jeremy, > That's a bad idea. Changing systemwide hostname resolution for a unit test has huge side effects for a disposable use case. Please don't do this. > > It would be better to do something like mock gethostbyname() in a unit test mock resolver .so and use runtime linker hints like LD_PRELOAD to make sure the unit test binary links to the mock instead of the system resolver. OK. I sent a PR not to use mysql2gem.example.com, but to use localhost. And applied the patch to the rubygem-mysql2 RPM spec file. But I understand mocking a part of resolving hosting is even better. https://github.com/brianmario/mysql2/pull/1296 Fabio, > It looks like the upstream tests only use this weird setup because they use containers? No, it's not only for the CI cases using containers but also cases executed on the upstream GitHub Actions Ubuntu or MacOS. The domain is used in all the cases of the upstream CI. In the upstream source, the domain "mysql2gem.example.com" is used to create the spec/ssl/* files, the SSL certification keys. https://github.com/brianmario/mysql2/blob/bab4969264250abca836e85a9c332c42be573dfc/spec/ssl/gen_certs.sh#L22 and it is also used in the SSL related unit tests. https://github.com/brianmario/mysql2/blob/bab4969264250abca836e85a9c332c42be573dfc/spec/mysql2/client_spec.rb#L156 > For running the test suite in the Fedora package, it should be much easier to patch the test sources to not connect to the mysql2gem.example.com domain (which requires the /etc/hosts entry, which you can't do in mock) but to "localhost" or "127.0.0.1" (which should always work). Yeah we applied the patch not to connect to the mysql2gem.example.com domain, but to connect to the localhost domain. Petr, > Another reason not to do it: example.com. domain is reserved for documentation purposes. Please do not use in any code or configuration. OK. I will keep in mind the point. Frank, > True, though the same RFC 2606 reserves[1] the ".test" domain for exactly the purpose used here; the only real issue is that they should switch from example.com to example.test. (Or, really, ${ANYTHING}.test.) Thanks for the primary source about how to use the testing domains! Jun -- Jun | He - Him | Timezone: UTC+1 or 2, Czech Republic See <https://www.worldtimebuddy.com/czech-republic-prague-to-utc> for the timezone. _______________________________________________ packaging mailing list -- packaging@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to packaging-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/packaging@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue