:white_check_mark: Add unit test for audit

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (264c79c) 33.33% compared to head (cde6eba) 33.37%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #279 +/- ## ========================================== + Coverage 33.33% 33.37% +0.04% ========================================== Files 132 131 -1 Lines 9240 9070 -170 ========================================== - Hits 3080 3027 -53 + Misses 5846 5738 -108 + Partials 314 305 -9 ``` | [Flag](https://app.codecov.io/gh/go-sigma/sigma/pull/279/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-sigma) | Coverage Δ | | |---|---|---| | [unit-test-mysql](https://app.codecov.io/gh/go-sigma/sigma/pull/279/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-sigma) | `33.37% <ø> (+0.04%)` | :arrow_up: | | [unit-test-postgresql](https://app.codecov.io/gh/go-sigma/sigma/pull/279/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-sigma) | `33.37% <ø> (+0.04%)` | :arrow_up: | | [unit-test-sqlite3](https://app.codecov.io/gh/go-sigma/sigma/pull/279/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-sigma) | `33.37% <ø> (+0.04%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-sigma#carryforward-flags-in-the-pull-request-comment) to find out more.

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