Increase scanner coverage to 100%

[soulteary]

Summary

• add targeted tests to cover unreadable directories, unreadable files, and walk errors when loading SSH configs
• extend scanner error tests (both external and internal) to ensure bufio.Scanner failures return nil
• refactor ReadSingleConfig to store scanner errors in a local variable for clarity

Testing

• go test ./...
• go test -count=1 ./internal/fn -coverprofile=coverage.out

---

https://chatgpt.com/codex/tasks/task_e_690ccd29b56c83279634e7e3a10e3e0a

---

Note

Adds comprehensive tests for walk/permission/error scenarios and scanner failures, plus a minor refactor to handle scanner errors via a local variable.

• Tests:
  • internal/fn/scanner_test.go:
    • Add walk error coverage: inaccessible directories, unreadable files, and error propagation during filepath.Walk (including concurrent deletion).
    • Strengthen scanner error test to ensure overlong lines trigger bufio.Scanner failure and return nil.
  • internal/fn/scanner_internal_test.go:
    • New internal test validating ReadSingleConfig returns nil on scanner errors.
• Refactor:
  • internal/fn/scanner.go: Store scanner.Err() in local scanErr before returning, clarifying error handling in ReadSingleConfig.

^{Written by Cursor Bugbot for commit 73db837. This will update automatically on new commits. Configure here.}

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.99%. Comparing base (77f598d) to head (73db837).
❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #8   +/-   ##
=======================================
  Coverage   98.99%   98.99%           
=======================================
  Files          11       11           
  Lines         595      596    +1     
=======================================
+ Hits          589      590    +1     
  Misses          3        3           
  Partials        3        3           

☔ 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.