fix: remove unused variable in test_server to restore clean build

[SoorejS]

Summary

Removes unused variable declarations in test_server.go that were causing go build ./... to fail.

Changes

• Removed unused user variables in two for loops
• Replaced with blank identifier _ to maintain loop structure
• No functional changes to the code
• Restores clean backend build

Impact

• Fixes build errors
• Improves code quality by removing unused variables
• No behavior changes
• No dependencies affected

Summary by CodeRabbit

• Refactor
  • Internal code cleanup and optimization with no user-facing changes.

[coderabbitai]

📝 Walkthrough

Walkthrough

Two Go range loops in a test server file have their unused loop variables removed by simplifying the loop syntax from explicit variable binding to implicit range iteration, maintaining identical control flow.

Changes

Cohort / File(s)	Summary
Unused Variable Removal backend/test_server.go	Simplifies two range loops by removing unused loop variables, changing from for _, user := range pool { to for range pool { pattern.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A loop without a name to bind,
Clean as the morning breeze through pine,
Variables fade, like whispers old,
Simpler code, a joy to behold!

🚥 Pre-merge checks | ✅ 3 | ❌ 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 (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and accurately describes the main change: removing unused variables in test_server to fix the build.
Merge Conflict Detection	✅ Passed	✅ No merge conflicts detected when merging into main

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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No actionable comments were generated in the recent review. 🎉

🧹 Recent nitpick comments

backend/test_server.go (2)

15-22: Empty error-handling blocks silently swallow errors.

All if err != nil {} blocks are no-ops. If AddToPool or StartMatchmaking fails, the test continues silently, masking real issues. This predates the PR, but since you're tidying this file, consider at minimum logging or panicking on error:

♻️ Suggested improvement

 err := ms.AddToPool("user1", "Alice", 1200)
 if err != nil {
+    panic(err)
 }

(Same pattern for the other three blocks.)

Also applies to: 27-33

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38-39: Empty loops serve no purpose and should be removed or replaced with assertions.

The for range pool syntax correctly eliminates the unused variable and restores the build. However, both loops have empty bodies and iterate over the pool without doing anything — they appear to be debugging remnants. Either remove them entirely, or replace with actual assertions (e.g., assert pool length > 0) if this file is meant to serve as a smoke test.

Also note: Your go.mod targets Go 1.24, which fully supports for range syntax (available since Go 1.22).

Also applies to: 47-48

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