test: Add test for keys

[codecov[bot]]

Codecov Report

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

Project coverage is 67.58%. Comparing base (04ff6e9) to head (cb32ed8). Report is 1 commits behind head on main.

:white_check_mark: All tests successful. No failed tests found.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #258 +/- ## ========================================== + Coverage 67.45% 67.58% +0.13% ========================================== Files 111 111 Lines 11528 11528 Branches 660 661 +1 ========================================== + Hits 7776 7791 +15 + Misses 3752 3737 -15 ```

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