Add tests for new database methods

[codecov[bot]]

Codecov Report

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

Project coverage is 87.99%. Comparing base (5588f0e) to head (8ab51dc).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #544 +/- ## ========================================== + Coverage 87.57% 87.99% +0.42% ========================================== Files 44 44 Lines 6212 6282 +70 ========================================== + Hits 5440 5528 +88 + Misses 772 754 -18 ```

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