Add more tests

[vjik]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌

Related PRs:

• Fix "GROUP BY" builder ignoring parameters db-sqlite#413

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.79%. Comparing base (85742a8) to head (ac7ac0a).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1141      +/-   ##
============================================
+ Coverage     98.63%   98.79%   +0.16%     
  Complexity     1654     1654              
============================================
  Files           120      120              
  Lines          4308     4301       -7     
============================================
  Hits           4249     4249              
+ Misses           59       52       -7     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.