Fix trailing uncovered chunk generation in chunkify

[bartveneman]

Summary

Fixed a bug in the chunkify function where the condition for appending a trailing uncovered chunk was incorrect, causing it to miss the last byte when it wasn't covered by any range.

Changes

• Fixed boundary condition: Changed the condition from offset !== stylesheet.text.length - 1 to offset < stylesheet.text.length to correctly detect when a trailing uncovered chunk should be appended
• Added test coverage:
  • Test for including a trailing uncovered chunk when the last byte is not covered
  • Test to ensure no spurious empty chunk is emitted when the last byte is fully covered

Implementation Details

The original condition used !== which only appended a chunk when the offset was not exactly one position before the end. This failed to handle the case where the last byte needed to be marked as uncovered. The corrected condition < properly checks if there are any remaining bytes after the current offset that need to be included in the coverage map.

https://claude.ai/code/session_01CyibEZDpRhyvg4fw3edy1Z

[codecov-commenter]

Bundle Report

Changes will decrease total bundle size by 6 bytes (-0.02%) ⬇️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
index.js-esm	12.12kB	-6 bytes (-0.05%) ⬇️

Affected Assets, Files, and Routes:

view changes for bundle: index.js-esm

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
index.js	-6 bytes	10.76kB	-0.06%

Files in index.js:

• ./src/lib/chunkify.ts → Total Size: 1.53kB

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.07%. Comparing base (2a325c2) to head (da982fe).
⚠️ Report is 12 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #86      +/-   ##
==========================================
- Coverage   96.56%   96.07%   -0.50%     
==========================================
  Files          14       14              
  Lines        1020     1020              
  Branches      136      136              
==========================================
- Hits          985      980       -5     
- Misses         34       39       +5     
  Partials        1        1              

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