orm unit test api

[NWYLZW]

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[codecov]

Codecov Report

Merging #347 (09cb9da) into develop (fbed4ec) will decrease coverage by 0.19%.
The diff coverage is 97.48%.

❗ Current head 09cb9da differs from pull request most recent head 9f48640. Consider uploading reports for the commit 9f48640 to get more accurate results

@@             Coverage Diff             @@
##           develop     #347      +/-   ##
===========================================
- Coverage    92.76%   92.57%   -0.20%     
===========================================
  Files           57       63       +6     
  Lines        11540    12843    +1303     
  Branches      2396     2661     +265     
===========================================
+ Hits         10705    11889    +1184     
- Misses         835      954     +119     

Impacted Files	Coverage Δ
packages/plugin-mysql/src/index.ts	92.50% <63.63%> (ø)
packages/plugin-mysql/src/database.ts	85.40% <66.66%> (ø)
packages/koishi-test-utils/src/memory.ts	98.64% <90.00%> (-0.42%)	⬇️
packages/plugin-mongo/src/index.ts	84.50% <96.77%> (ø)
packages/koishi-core/src/database.ts	97.22% <100.00%> (+0.03%)	⬆️
packages/koishi-test-utils/src/index.ts	100.00% <100.00%> (ø)
packages/koishi-test-utils/src/tests/builtin.ts	100.00% <100.00%> (ø)
packages/koishi-test-utils/src/tests/index.ts	100.00% <100.00%> (ø)
packages/koishi-test-utils/src/tests/query.ts	100.00% <100.00%> (ø)
... and 5 more

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