refactor dsn_test.go

[methane]

This pull request refactors the DSN parsing tests in dsn_test.go to improve maintainability and clarity. The main change is the introduction of a helper function, newTestConfig, which builds the expected Config objects with explicit defaults. This makes the tests less repetitive and more robust against regressions in default values.

Checklist

• Code compiles correctly
• Created tests which fail without the change (if possible)
• All tests passing
• Extended the README / documentation, if necessary
• Added myself / the copyright holder to the AUTHORS file

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Team

Run ID: a5e859b6-9470-477a-b635-662d51232f99

📥 Commits

Reviewing files that changed from the base of the PR and between e575018 and c5dc4b7.

📒 Files selected for processing (1)

• dsn_test.go

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Walkthrough

The DSN test fixtures now use newTestConfig for shared Config defaults. Each case sets only DSN-specific fields. Expected configuration values remain unchanged.

Changes

DSN test fixture refactor

Layer / File(s)	Summary
Shared DSN test configuration dsn_test.go	Adds newTestConfig with explicit defaults and updates all testDSNs cases to use closure-based overrides for non-default fields.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: ⚪ Minimal · up to c5dc4

This refactor centralizes repeated DSN test configuration defaults while preserving the expected parsed configurations. No current merge-blocking risk is identified.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 1 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly identifies the refactoring of dsn_test.go, which is the main change in the pull request.
Description check	✅ Passed	The description accurately explains the newTestConfig helper and the goal of reducing repetition in DSN parsing tests.

• Fix all pre-merge checks with AI

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[coveralls]

coverage: 84.486% (+0.008%) from 84.478% — methane:refactor-dsn-test into go-sql-driver:master

[Copilot]

🟢 Approval recommended

The test-only refactor is clear, focused, and has no unresolved issues.

Pull request overview

Refactors DSN parsing tests to reduce repetition while keeping expected defaults explicit.

Changes:

• Adds newTestConfig for shared defaults.
• Uses focused callbacks to configure individual test expectations.

File summaries

File	Description
dsn_test.go	Simplifies expected DSN configurations without changing test behavior.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 0
• Review effort level: Balanced

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