test(INET): test for unzero6 bash function

[SimonFair]

Summary by CodeRabbit

• Tests
  • Added comprehensive test coverage for IPv6 normalization and compression features, including validation of expansion, zero suppression, and mixed-case hexadecimal handling.

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[coderabbitai]

Walkthrough

A new Bash test script is added to validate the unzero6 function's IPv6 normalization and compression behavior. The script implements an assertion helper to compare expected output, runs multiple test cases covering full expansion, zero suppression, and hex formatting scenarios, and reports pass/fail counts.

Changes

Cohort / File(s)	Summary
Test Scripts tests/unzero6.sh	New test suite for IPv6 normalization function with assertion-based validation of compression, expansion, and mixed-case hex handling across multiple IPv6 address scenarios

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 A new test script hops into sight,
IPv6 addresses, normalizing right!
Zero suppression, expansion divine,
Hex cases mixed in each perfect line,
Testing compression with bunny delight! ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically describes the main change: adding a test for the unzero6 bash function, which matches the new test script added in tests/unzero6.sh.

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✨ Finishing touches

• 📝 Generate docstrings

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