🧹 chore: Test HEAD request compliance

[gaby]

Summary

• add regression coverage to ensure auto-generated HEAD responses mirror GET handlers for SendString routes
• add the same validation for SendFile routes to confirm metadata parity without payloads

[coderabbitai]

Note

Other AI code review bot(s) detected

CodeRabbit has detected other AI code review bot(s) in this pull request and will avoid duplicating their findings in the review comments. This may lead to a less comprehensive review.

Walkthrough

Added two tests verifying automatic HEAD behavior for GET and SendFile responses, and introduced a windowsOS constant used for runtime OS checks in prefork-related code.

Changes

Cohort / File(s)	Summary
Tests (app tests) app_test.go	Added import path/filepath. Added Test_App_AutoHead_Compliance to assert HEAD mirrors GET headers with empty body. Added Test_App_AutoHead_Compliance_SendFile to assert HEAD responses for SendFile include headers and have empty body.
Prefork OS constant prefork.go	Introduced windowsOS constant and replaced literal "windows" checks with windowsOS in watchMaster and dummyCmd code paths.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

• Small, focused changes across two areas (tests and a small refactor).
• Pay attention to:
  • app_test.go for test correctness, imports, and assertions.
  • prefork.go for consistent use of the new windowsOS constant and no behavioral changes.

Possibly related PRs

• 🔥 feat: Add support for DisableAutoRegister of HEAD routes #3817 — Related to automatic HEAD-route behavior and SendFile handling tested here.

Suggested reviewers

• sixcolors
• ReneWerner87
• efectn

Poem

🐰 I hop through code with eager paws,
I check the HEAD without a pause.
Headers kept and bodies light,
Windows named just once — polite.
Tests pass, I nibble on my cause. 🥕

Pre-merge checks and finishing touches

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The PR description is minimal and missing most required template sections. It lacks issue references, detailed change lists, type categorization, checklist completion, and doesn't address the unrelated prefork.go changes.	Fill out the full template including: issue references, complete 'Changes introduced' section with details, select appropriate 'Type of change', complete the checklist, and document the prefork.go constant extraction separately.
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	You can run @coderabbitai generate docstrings to improve docstring coverage.

✅ Passed checks (1 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title mentions testing HEAD request compliance, which aligns with the primary changes: new tests for AUTO HEAD compliance behavior. However, it includes an emoji and uses broad terminology that doesn't clarify it's specifically about regression test coverage.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch add-tests-for-auto-head-compliance

---

📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between c5cbe8f and 779a318.

📒 Files selected for processing (1)

• prefork.go (3 hunks)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (5)

• GitHub Check: unit (1.25.x, windows-latest)
• GitHub Check: repeated
• GitHub Check: lint
• GitHub Check: Compare
• GitHub Check: update_release_draft

🔇 Additional comments (3)

prefork.go (3)

21-26: LGTM! Good refactor to centralize OS name checks.

The addition of the windowsOS constant improves maintainability by providing a single source of truth for Windows OS comparisons throughout the prefork logic.

---

162-162: LGTM! Consistent use of the new constant.

The refactor correctly replaces the string literal with the windowsOS constant, maintaining the same logic while improving maintainability.

---

192-192: LGTM! Completes the consistent refactor.

Both Windows OS checks in the file now use the centralized windowsOS constant, improving code consistency and maintainability.

---

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[gemini-code-assist]

Summary of Changes

Hello @gaby, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the test suite by introducing comprehensive compliance tests for HTTP HEAD requests. The new tests specifically verify that HEAD responses for both SendString and SendFile routes correctly reflect the status codes and headers of their GET counterparts, while ensuring that the response body remains empty. This provides critical regression coverage to maintain adherence to HTTP specifications for HEAD requests.

Highlights

• HEAD Request Compliance for SendString: Added new regression tests to ensure that auto-generated HEAD responses for SendString routes mirror the status codes and headers of their corresponding GET handlers, while having an empty body.
• HEAD Request Compliance for SendFile: Introduced new compliance tests to validate that HEAD responses for SendFile routes maintain metadata parity (status codes and headers) with GET requests, but without including the file payload.
• New Test Utilities: Incorporated path/filepath for robust temporary file handling within the new SendFile compliance tests.

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[gemini-code-assist]

Code Review

This pull request adds regression tests to ensure that auto-generated HEAD responses are compliant with their corresponding GET handlers for both SendString and SendFile routes. The changes are well-implemented and cover the intended functionality. I've suggested a refactoring to combine the two new test functions into a single table-driven test to improve maintainability and reduce code duplication.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.69%. Comparing base (db2576e) to head (779a318).
⚠️ Report is 52 commits behind head on main.

Files with missing lines	Patch %	Lines
prefork.go	0.00%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3868   +/-   ##
=======================================
  Coverage   91.69%   91.69%           
=======================================
  Files         115      115           
  Lines        9819     9819           
=======================================
  Hits         9004     9004           
  Misses        516      516           
  Partials      299      299           

Flag	Coverage Δ
unittests	91.69% <0.00%> (ø)

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[Copilot]

Pull Request Overview

This PR adds regression coverage for auto-generated HEAD request handling in Fiber. The tests ensure that HEAD responses automatically created from GET handlers maintain proper header parity (status code, content-length, content-type, and custom headers) while correctly omitting response bodies.

Key changes:

• Add Test_App_AutoHead_Compliance to verify HEAD response metadata matches GET response for SendString routes
• Add Test_App_AutoHead_Compliance_SendFile to validate the same behavior for SendFile routes

[github-actions]

⚠️ Performance Alert ⚠️

Possible performance regression was detected for benchmark.
Benchmark result of this commit is worse than the previous benchmark result exceeding threshold 1.50.

Benchmark suite	Current: c5cbe8f	Previous: 3bf25e8	Ratio
Benchmark_NewError	72.64 ns/op 24 B/op 1 allocs/op	44.92 ns/op 24 B/op 1 allocs/op	1.62
Benchmark_NewError - ns/op	72.64 ns/op	44.92 ns/op	1.62

This comment was automatically generated by workflow using github-action-benchmark.