<https://dev.to/kerooker/writing-reusable-tests-with-kotest-s-test-factory-5gi>

# kotest

[LeoColman]

https://dev.to/kerooker/writing-reusable-tests-with-kotest-s-test-factory-5gi

[SerVB]

That's great, thank you for the guide! I already know some places where I will use it 😁

By the way, I've already extracted many places like that. However, I think some of them can't be rewritten as factories easily: for example, this one: https://github.com/SerVB/e-shop/blob/cd69df8c33e227c5cea9bf72ebac579a699bdf81/auth/src/test/kotlin/io/github/servb/eShop/auth/testContainerEShopAuth.kt#L25-L31

fun BehaviorSpec.givenTestContainerEShopAuth(test: suspend GivenContext.(TestApplicationEngine) -> Unit) {
    given("test container e-shop-auth") {
        withTestApplication(Application::testContainerEShopAuth) {
            [e-mail](this)
        }
    }
}

If I rewrite it like a factory, then I have to call it like

include(givenTestContainerEShopAuth { app ->
  // ...
})

I think it's not too clean. Maybe something like

include.givenTestContainerEShopAuth { app ->
  // ...
}

is better 😀

[LeoColman]

Nice, @SerVB!

[LeoColman]

Do you have a suggestion on how we can extract that code of yours to the abstract factories?

[SerVB]

Yep. The variant, as I've said, can be introducing another way of defining includes:

include.givenTestContainerEShopAuth { app ->
  // ...
}

This should give not an object of *Spec type but of *Context type so it can be used inside a spec.

I think the syntax should be discussed, though