test(SemVer): refine tests and remove unnecessary tests which test th…

[bearomorphism]

…e behavior of library

Description

• Move the test cases next to the test suites
• Remove tests testing the library's behavior

Checklist

• I have read the contributing guidelines

Code Changes

• Add test cases to all the changes you introduce
• Run poetry all locally to ensure this change passes linter check and tests
• Manually test the changes:
  • Verify the feature/bug fix works as expected in real-world scenarios
  • Test edge cases and error conditions
  • Ensure backward compatibility is maintained
  • Document any manual testing steps performed
• Update the documentation for the changes

Documentation Changes

• Run poetry doc locally to ensure the documentation pages renders correctly
• Check and fix any broken links (internal or external) in the documentation

When running poetry doc, any broken internal documentation links will be reported in the console output like this:

INFO    -  Doc file 'config.md' contains a link 'commands/bump.md#-post_bump_hooks', but the doc 'commands/bump.md' does not contain an anchor '#-post_bump_hooks'.

Expected Behavior

Steps to Test This Pull Request

Additional Context

[bearomorphism]

I'm not sure why we need to test this. The __lt__ operator is defined in packaging library and we are not overriding it.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.25%. Comparing base (120d514) to head (8d3387c).
⚠️ Report is 805 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1598      +/-   ##
==========================================
+ Coverage   97.33%   98.25%   +0.91%     
==========================================
  Files          42       58      +16     
  Lines        2104     2694     +590     
==========================================
+ Hits         2048     2647     +599     
+ Misses         56       47       -9     

Flag	Coverage Δ
unittests	98.25% <ø> (+0.91%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.