[Fix] order: ensure arcane imports do not cause undefined behavior

[Xunnamius]

Depends on #3127

This PR implements in import/order: a fix to ensure NaN is never passed into rank-computing functions, which can result in undefined behavior.

A demo package containing this fix is temporarily available for easy testing:

npm install --save-dev eslint-plugin-import@npm:@-xun/eslint-plugin-import-experimental

Ensure strange imports do not cause strange behavior

There are certain edge cases where a NaN rank gets passed around, such as using an import with an absolute specifier under certain configurations. The fix concerns the computeRank function.

This PR includes a unit test to catch potential regressions.

[ljharb]

seems good overall, assuming the test fails without the fix :-)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.65%. Comparing base (668d493) to head (40cf277).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3128      +/-   ##
==========================================
+ Coverage   95.62%   95.65%   +0.02%     
==========================================
  Files          83       83              
  Lines        3636     3658      +22     
  Branches     1284     1305      +21     
==========================================
+ Hits         3477     3499      +22     
  Misses        159      159              

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