ArgumentMatcher for Kotlin

Question

I'm trying to use ArgumentMatcher in my tests. I do next:

Mockito.`when`(someRepository.save(
        argThat { it.name == someName } // Here I want to do mock for all objects with name someName
    )).thenReturn(save(someEntity))

And I get next error: Type inference failed: Not enough information to infer parameter T in fun when(p0: T!): OngoingStubbing!

How properly write ArgumentMatcher in Kotlin?

Answer 1

I found a solution by adding ArgumentMatcher from java class. My IDE converted it to Kotlin:

In java:

Mockito.when(someRepository.save(ArgumentMatchers.argThat(entity-> entity.getName().equals("someName")
            && entity.getDescription().equals("somedescritpion")
            ))));

In Kotlin:

Mockito.`when`<Any>(someRepository.save(ArgumentMatchers.argThat { (name, _, description, ) ->
        (name == "someName" && description == "somedescritpion"
                )
    }))

Note: You should add _ if you have some fields which you don't want to consider in the matcher.