Hi, Big fan of Kotest! Thanks for this amazing lib...

# kotest

[nelson ramirez]

Hi, Big fan of Kotest! Thanks for this amazing library.
Newbie property testing question: I'm trying to compose an object with Arb.bind() , the object contains a list of other objects. I'm having trouble generating a list of objects to populate my main arb with..
Here's what I have

class CartModelTest : StringSpec({
    "create Cart from CartEntity" {
        val cartItemArb: Arb<CartLineItemEntity> = Arb.bind(
            Arb.string(),
            <http://Arb.int|Arb.int>(1..999)
        ) { randomItemId, randomQuantity ->
            CartLineItemEntityBuilder()
                .itemId(randomItemId)
                .quantity(randomQuantity)
                .build()

        }
        val cartEntityArb: Arb<CartEntity> = Arb.bind(
            Arb.string(),
            Arb.double(),
            <http://Arb.int|Arb.int>()
        ) { randomId, randomAmount, randomItemCount ->
            val amount = AmountBuilder().value(randomAmount).build()
            CartEntityBuilder()
                .cartId(randomId)
                .grandTotal(amount)
                .subtotal(amount)
                .totalDiscount(amount)
                .numberOfItems(randomItemCount)
                    //TODO how do i create a random list of CartLineItems?
                .itemList(listOf(cartItemArb.single()))
                .build()
        }
        checkAll(cartEntityArb) { cartEntity ->
            val result = Cart.fromCartEntity(cartEntity)
            result.workfile shouldBe cartEntity.cartId
        }
    }
})

How do I populate itemList in my cartEntityArb with a list of cartItemArbs ?

[sam]

In your cart entity arb, make a fourth parameter by an Arb.list that itself uses your cart item arb

[sam]

val cartEntityArb: Arb<CartEntity> = Arb.bind(
            Arb.string(),
            Arb.double(),
            Arb.list(cartItemArb, 1..10)
        ) { randomId, randomAmount, randomItems ->

[nelson ramirez]

Awesome. that worked beautifully. Thank you! 🙌