How can I ensure that `Arb.set` or `Arb.list` gene...

# kotest

[dave08]

How can I ensure that Arb.set or Arb.list generates unique entries by my entity id?

[sam]

What do you mean ?

[dave08]

Arb.list(entity1Arb()), shouldn't generate any duplicate `id`s in the list.

[dave08]

Which is what happens in a real database... also, sometimes there might be other unique keys...

[dave08]

So far, all I see is making a mutable set to store all currently generated values, and add to it in the filter method on the lists' arb and check if the current one was already added.

[sam]

well Arb.set will generate only unique values because its a set

[dave08]

So, if I would override the equals() function, I could make sure id is the unique key and then map it to a list... but when I have multiple such keys, I guess that wouldn't work anymore...

[sam]

You could create an overriden Arb.set that accepts a function for equality

[dave08]

There's no Arb.set(...).toList()?

[sam]

no

[dave08]

Actually, in my case, I need to pass to varargs... I'm probably doing this wrong... My repo needs to be initialized with a random list of customers (apart from the one I need for the test).. I guess I could use next() and convert it after.

[sam]

next() or single() will bring back one random value from an Arb