add test for rollback in fixture

[collerek]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (0129c1a) to head (f52a9ba).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #1521   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          211       212    +1     
  Lines        15135     15167   +32     
=========================================
+ Hits         15135     15167   +32     

Files with missing lines	Coverage Δ
...ests/test_databases/test_transaction_as_fixture.py	100.00% <100.00%> (ø)

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[codspeed-hq]

Merging this PR will degrade performance by 38.5%

❌ 2 (👁 2) regressed benchmarks
✅ 82 untouched benchmarks

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
👁	Simulation	test_avg[250]	3.1 ms	4.5 ms	-32.04%
👁	Simulation	test_get_or_create_when_get[250]	2.4 ms	3.9 ms	-38.5%

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_{Comparing add-tests-with-transaction-rollback-as-fixture (f52a9ba) with master (0129c1a)}