test: Add unit test for internal/trace/metrics.go

[gru-agent]

Trigger Info

Trigger Type	Triggered By	Source File	Assignment
Auto Trigger	TestGru	internal/version/version.go	Detail

Summary

This PR introduces unit tests for the metricsSetup function in the trace package. The tests validate the creation and configuration of Prometheus metrics, ensuring they are correctly initialized with the expected parameters. Key changes include:

• Test for TracingProcessCount Metric:

  • Verifies the metric is not nil.

  • Confirms the namespace, subsystem, name, help text, and variable labels are correctly set.

• Test for tracingSamplerCount Metric:

  • Ensures the metric is not nil.

  • Checks the namespace, subsystem, name, help text, and variable labels are properly configured.

Additionally, the Prometheus default registerer is reset to avoid conflicts with existing metrics during testing. This ensures a clean slate for metric validation.

Coverage

The change in coverage value, such as: 0% -> 50%, indicates that the coverage was 0% before writing the tests and 50% after writing them.

https://web.dev/articles/ta-code-coverage

Type	Change
lines	0% -> 0%
statements	0% -> 0%
functions	0% -> 0%
branches	0% -> 0%

Test Statuses

Status	Change
passed	0 -> 12 🔺
failed	0 -> 0
skipped	0 -> 0
error	1 -> 0 🔻
source	ai

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[guance-review-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud