Does Strikt have a matcher for iterables similar t...

# strikt

[Klitos Kyriacou]

Does Strikt have a matcher for iterables similar to AssertK's containsOnly (or Kotest's shouldContainOnly)?
Description from AssertK: "Asserts the iterable contains only the expected elements, in any order. Duplicate values in the expected and actual are ignored."

[Jakub Gwóźdź]

containsExactlyInAnyOrder

[Jakub Gwóźdź]

(I don’t know how it treats duplicates, so .toSet() before matching might be required)

[Klitos Kyriacou]

Thanks. The treatment of duplicates is different, so as you suggest, the equivalent of AssertK's

assertThat(listOf(0,0,0)).containsOnly(0)

is

expectThat(listOf(0,0,0).toSet()).containsExactlyInAnyOrder(0)

which is a bit more cumbersome.

[christophsturm]

you can just extract your own containsOnly matcher

[christophsturm]

ok in that case you cannot just extract it but it could look like this:

fun <T : Iterable<E>, E> Assertion.Builder<T>.containsOnly(vararg elements: E): Assertion.Builder<T> =
    assert("contains only $elements") {
        if (it.toSet() == elements.toSet()) pass() else fail()
    }