feat: add even more tests

[raphasampaio]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 98.97611% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.17%. Comparing base (3c648bb) to head (7de25b0).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
tests/test_c_api_database_lifecycle.cpp	97.16%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #26      +/-   ##
==========================================
+ Coverage   87.33%   88.17%   +0.83%     
==========================================
  Files          49       49              
  Lines        6648     6941     +293     
  Branches      399      404       +5     
==========================================
+ Hits         5806     6120     +314     
+ Misses        836      813      -23     
- Partials        6        8       +2     

Flag	Coverage Δ
cpp	92.41% <98.97%> (+0.78%)	⬆️
dart	71.86% <ø> (ø)
julia	60.22% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
tests/test_database_errors.cpp	100.00% <100.00%> (ø)
tests/test_element.cpp	100.00% <100.00%> (ø)
tests/test_lua_runner.cpp	100.00% <100.00%> (ø)
tests/test_schema_validator.cpp	100.00% <100.00%> (ø)
tests/test_c_api_database_lifecycle.cpp	98.66% <97.16%> (-0.82%)	⬇️

... and 4 files with indirect coverage changes

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