add api tests

[bahmutov]

No description provided.

[codecov]

Codecov Report

Merging #11 (566f115) into develop (01e4f0e) will increase coverage by 4.04%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop      #11      +/-   ##
===========================================
+ Coverage    94.98%   99.03%   +4.04%     
===========================================
  Files           79       79              
  Lines         1437     1444       +7     
  Branches       234      234              
===========================================
+ Hits          1365     1430      +65     
+ Misses          72       14      -58     

Flag	Coverage Δ
ui	99.03% <ø> (+4.04%)	⬆️

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Impacted Files	Coverage Δ
src/utils/transactionUtils.ts	98.00% <0.00%> (-2.00%)	⬇️
backend/database.ts	100.00% <0.00%> (+5.24%)	⬆️
backend/helpers.ts	100.00% <0.00%> (+9.09%)	⬆️
backend/bankaccount-routes.ts	100.00% <0.00%> (+20.83%)	⬆️
backend/notification-routes.ts	100.00% <0.00%> (+22.22%)	⬆️
backend/banktransfer-routes.ts	100.00% <0.00%> (+25.00%)	⬆️
backend/user-routes.ts	100.00% <0.00%> (+26.47%)	⬆️
backend/comment-routes.ts	100.00% <0.00%> (+29.41%)	⬆️
backend/like-routes.ts	100.00% <0.00%> (+31.25%)	⬆️
backend/contact-routes.ts	100.00% <0.00%> (+59.09%)	⬆️

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