Add ContextValue version_cmp method tests for CentOS Stream and RHEL

[junaruga]

Add the test_version_cmp_centos_stream and test_version_cmp_rhel.

The main purpose to add these tests is to make sure the distro: centos-stream-rawhide and distro: rhel-X.rawhide such as distro: rhel-10.rawhide, distro: rhel-9.rawhide work.
Because I heard that the distro: rhel-10.rawhide work

For the documentation, there is the following document about the fedora-rawahide. Let me know if you want to update the document with centos-stream and rhel.

https://fmf.readthedocs.io/en/stable/context.html#context
https://github.com/teemtee/fmf/blob/39af408279b305bd8744e1a74c4ad09958394587/docs/context.rst#major-version

fedora-33 < fedora-rawhide ---> True (rawhide is newer than any number)

Checklist

• implement the feature
• write the documentation
• extend the test coverage
• mention the version
• include a release note

[LecrisUT]

This just feels wrong. My understanding is that the current comparison works just because of the accident of string comparison. I would prefer if we can start work on #289, and instead define more explicitly how the context need to be ordered.

[junaruga]

@LecrisUT Thanks for your response. I think you are right. The name rhel-X.rawhide means actually the latest minor version of the rhel-X, and centos-stream-rawhide means actually the latest version of the centos-stream. But there are no official definition of rawhide in RHEL and CentOS Stream. This may confuse people. So, I hope you guys would work on the feature #289.

My understanding is that the current comparison works just because of the accident of string comparison.

I suppose that the ContextValue version_cmp method calls ContextValue.compare method converting the string into integer at the following lines.

fmf/fmf/context.py

Lines 159 to 161 in 39af408

	# convert to int
	first_version = int(first)
	second_version = int(second)

However, while the comparing logic is to convert the version string to integer, there is already the document about the "fedora-33 < fedora-rawhide ---> True". And it seems the rhel-X.rawhide is already used in practice in my company.

[junaruga]

It seems the CI testing-farm failures are not related to this PR.

For example, for the testing-farm:fedora-rawhide-x86_64 case:

https://artifacts.dev.testing-farm.io/8b1bb6af-012e-4798-87c2-58c1d092e346/

https://artifacts.dev.testing-farm.io/8b1bb6af-012e-4798-87c2-58c1d092e346/work-integrationf2bjxab0/plans/integration/execute/data/guest/default-0/tests/core/about-2/data/List-plugins-as-YAML/output.txt

:: [ 14:03:50 ] :: [   FAIL   ] :: Command 'yq '. | to_entries | [.[] | "\(.key): \(.value | sort | join(\" \"))"] | sort | .[]' /var/tmp/rlRun_LOG.laN6NHNJ > /tmp/tmp.O9vCfgKQ11/actual-plugin-list.txt' (Expected 0, got 3)
:: [ 14:03:50 ] :: [   FAIL   ] :: Command 'diff -u /tmp/tmp.O9vCfgKQ11/expected-plugin-list.txt /tmp/tmp.O9vCfgKQ11/actual-plugin-list.txt' (Expected 0, got 1)