Mockito ArgumentCaptor equivalent in spockframework

Question

I'm beginning to write unit tests with spockframework, and I want to verify the arguments passed to some method of a class my test depends on. In Mockito we have ArgumentCaptor to do this, but I couldn't figure out a way to do that on spock.

Maybe some manipulation on the closure (I'm still trying to learn that)? Or spock have some built in functionality?

I appreciate any guidance to learn that!

Answer 1

This is how you do it in Spock:

def "it checks the arguments passed to the helper"() {
    given:
    def cut =new Cut(helper:Mock(Helper))

    when:
    cut.doStuff()

    then:
    1 * cut.helper(expectedArg) >> returnedResult

    where:
    expectedArg="This is expected"
    returnedResult="xyz"
}