Can I use `capture(...)` as a parameter for extension functions? e.g. ```val slot = slot<String&...

# mockk

[Mikhail]

Can I use capture(...) as a parameter for extension functions?
e.g.

val slot = slot<String>()

capture(slot).snakeCase()

[Mikhail]

I got this:

kotlin.UninitializedPropertyAccessException: lateinit property captured has not been initialized
	at io.mockk.CapturingSlot.getCaptured(API.kt:2503)

As I see, the receiver wasn't captured. Any ideas?

[Klitos Kyriacou]

I don't understand what you're trying to do. Shouldn't it be something like this?

val slot = slot<String>()
every { capture(slot).snakeCase() } returns "a_b_c"
val res = "xyz".snakeCase()
println(slot.captured)

Have you initialised with mockkStatic first?

[Mikhail]

I want the example function return the passed string (no-op, basically)
Yeah, I've used mockkStatic

[Mikhail]

val slot = slot<String>()
every {
    capture(slot).snakeCase()
} returns slot.captured // <- fails here

[Mikhail]

wait, maybe I should do this:

val slot = slot<String>()
every {
    capture(slot).snakeCase()
} answers {
    slot.captured
}

let me try

[Klitos Kyriacou]

The above should work. Also try:

every { any().snakeCase() } answers { firstArg() }

[Mikhail]

Your suggestion works perfectly! Thanks.
Also, note that I had to use any<String>() instead.