What does this mean?

Notice: if a couple is already giving birth to a piglet, skip it when it given birth to it

I propose you use an AI tool to review your descriptions. Most of your sentences are a bit iffy.

Hello,

Lots of issues here... I confess I don't like the general idea in the first place ("yet another bank account problem :rolleyes:")

• The description is messed up (bullet points not rendered properly)
• It's neither specified nor tested if the original objects (given in th constructor) can/should be mutated, or if the internal state should be protected against mutation (which would be the way to go)
• The general setup with only one user logged in at a time is... "unfrotunate", let's say. That's totally unrealistic.
• The output format returning inconsistent types is also a bit unfortunate. Normally, I guess all outputs should be objects, and the error states would be {error: number}
• The random tests are very far, far away from a proper coverage of the various scenarii

Cheers