I'm probably missing something obvious... :rubber_duck:

You were really close to the answer ! You can write your own

Flow.all

this way:

suspend inline fun <T> Flow<T>.all(crossinline predicate: (T) -> Boolean): Boolean =
    fold(true) { result, element -> result && predicate(element) }

Thanks, it works now! I originally tried doing acc && true in the first block... but AS suggested to simplify it to

acc

only... was that my mistake?

To me, the problem was that you passed

false

as the initial value, so that

acc

is always false even if

value == ActionStatus.SUCCESS

Replacing

fold(false)

with

fold(true)

in your code should work