refactor: replace context.WithCancel with t.Context

[stringsbuilder]

Overview

The addition of the Context method to Go's testing.T provides significant improvements for writing concurrent tests. It allows better management of goroutines, ensuring they properly exit and preventing issues like deadlocks and unfinished processes.

By using Context, errors and cancellations can be handled more effectively, making tests more robust and easier to reason about. This change also enables tighter integration between tests and the application code, especially for systems that span multiple concurrent components. Overall, it simplifies test code and enhances test stability and maintainability.

More info: golang/go#18368

Summary by CodeRabbit

• Tests
  • Simplified test context management in async block retriever tests by using built-in test utilities instead of manual context creation and cleanup.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 62c2857b-06e8-4f5b-a1e3-65d828564918

📥 Commits

Reviewing files that changed from the base of the PR and between d27d099 and 70d2a0b.

📒 Files selected for processing (1)

• block/internal/da/async_block_retriever_test.go

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📝 Walkthrough

Walkthrough

Test context handling is refactored to use Go's built-in t.Context() method instead of manually creating cancellable contexts with context.WithCancel(). The change affects four test functions in the async block retriever test suite with no modification to test logic or control flow.

Changes

Cohort / File(s)	Summary
Test Context Refactoring block/internal/da/async_block_retriever_test.go	Replaced manual context cancellation setup (context.WithCancel() + deferred cancel()) with direct t.Context() usage across four test functions: TestAsyncBlockRetriever_SubscriptionDrivenCaching, TestAsyncBlockRetriever_CatchupFillsGaps, TestAsyncBlockRetriever_StopGracefully, and TestAsyncBlockRetriever_ReconnectOnSubscriptionError.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 No more cancel() calls to store,
Just t.Context() at the door,
Tests run cleaner, code so neat,
Context handling, now complete! ✨

🚥 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
Title check	✅ Passed	The title accurately describes the main refactoring: replacing context.WithCancel with t.Context in tests, and follows semantic commit conventions.
Description check	✅ Passed	The description is well-structured, explains the rationale for the change, and includes a reference to relevant Go issue #18368, though the Overview section is complete.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.14%. Comparing base (3a710a9) to head (8454c65).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3183      +/-   ##
==========================================
- Coverage   61.15%   61.14%   -0.02%     
==========================================
  Files         117      117              
  Lines       12082    12082              
==========================================
- Hits         7389     7387       -2     
- Misses       3867     3868       +1     
- Partials      826      827       +1     

Flag	Coverage Δ
combined	61.14% <ø> (-0.02%)	⬇️

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