Add more tests for db access

[linuxdaemon]

[codecov[bot]]

Codecov Report

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

Project coverage is 83.83%. Comparing base (a38d7d4) to head (8a02f78).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #690      +/-   ##
==========================================
+ Coverage   81.99%   83.83%   +1.83%     
==========================================
  Files         281      283       +2     
  Lines       20038    20529     +491     
  Branches     3145     3153       +8     
==========================================
+ Hits        16430    17210     +780     
+ Misses       3354     2993     -361     
- Partials      254      326      +72     

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