Just checking out Strikt. My previous preferred library was hamkrest. My first assertion is to validate the count of elements in a list. I see

exactly

,

atMost

, and

atLeast

, but all of these take an additional predicate. Is the preferred approach to do this?

expectThat(it).get { count() }.isEqualTo(3)

Is there any particular reason that there isn't a count matcher directly on list?

expectThat(it).hasSize(3)

should work for you

Its actually an

Iterable

, not a

List

. No

hasSize

matcher seems to be available.

Okay, that’s because

Iterable

doesn’t define a

size

property. That’s added on

Collection

. It wouldn’t make sense for all iterables (they can be unbounded, for example). For your case

expectThat(it.toList()).hasSize(3)

is probably the way to go.

The Kotlin stdlib does have a

count

function on

Iterable

. Normally unbounded iterables are represented as a

Sequence

.

hmm, I could easily move

hasSize

up to work on Iterable I guess

I think that makes sense, based on the extensions available in stdlib. Want me to create a GH issue?

but it might make more sense to add a

count()

function so you could do

expectThat(it).count().isEqualTo(3)

Makes sense to me

yeah, well…

Collection

does

Yup

I think the Strikt function would just be

fun Builder<out Iterable<*>>.count(): Builder<Int> =
  get(Iterable<*>::count)

I can confirm that worked. I was going to submit a PR but I see you beat me to it with a release of 0.28.1. 🙌