Unit tests in kotlin with specifications

Question

I need to get the results of the query with specifications. In order to do that I'm using JpaSpecificationExecutor's List<T> findAll(@Nullable Specification<T> spec) method. The problem is that I can't do the same in tests, cause it has several methods with the same parameters. Here is my method:

fun getFaqList(category: FaqCategory?, subcategory: FaqCategory?, searchText: String?): List<FaqEntity> {

    val spec = Specification.where(FaqSpecification.categoryEquals(category))
        ?.and(FaqSpecification.subcategoryEquals(subcategory))
        ?.and(
            stringFieldContains("title", searchText)
                ?.or(stringFieldContains("description", searchText))
        )

    return faqRepository.findAll(spec)
}

And the test that I'm trying to run:

@MockK
private lateinit var faqRepository: FaqRepository

@InjectMockKs
private lateinit var faqService: FaqService

companion object {
    val FAQ_CATEGORY_ENTITY = FaqCategoryEntity(
        id = AGRICULTURE
    )

    val FAQ_SUBCATEGORY_ENTITY = FaqCategoryEntity(
        id = AGRICULTURE_GENERAL
    )

    val FAQ_ENTITY = FaqEntity(
        id = FAQ_ID,
        title = "title",
        description = "description",
        category = FAQ_CATEGORY_ENTITY,
        subcategory = FAQ_SUBCATEGORY_ENTITY
    )
}

@Test
fun `getFaqList - should return faq list`() {
    val faqList = listOf(FAQ_ENTITY)

    every { faqRepository.findAll(any()) } returns faqList

    val response = faqService.getFaqList(AGRICULTURE, AGRICULTURE_GENERAL, FAQ_SEARCH_TEXT)

    assertThat(response).isEqualTo(faqList)
}

I'm getting error:

Overload resolution ambiguity. All these functions match.
public abstract fun <S : FaqEntity!> findAll(example: Example<TypeVariable(S)!>): 
(Mutable)List<TypeVariable(S)!> defined in kz.btsd.backkotlin.faq.FaqRepository
public abstract fun findAll(pageable: Pageable): Page<FaqEntity!> defined in 
kz.btsd.backkotlin.faq.FaqRepository
public abstract fun findAll(sort: Sort): (Mutable)List<FaqEntity!> defined in 
kz.btsd.backkotlin.faq.FaqRepository
public abstract fun findAll(spec: Specification<FaqEntity!>?): (Mutable)List<FaqEntity!> 
defined in kz.btsd.backkotlin.faq.FaqRepository

What should I write in findAll() params in order for spring to understand:

faqRepository.findAll(any())

Answer 1

Solved the problem with

every { faqRepository.findAll(any<Specification<FaqEntity>>()) } returns faqList

Answer 2

The problem is that the compiler can't decide what type any() is supposed to be and therefore which method to pick.

I'm not sure where any() is coming from, but if it is from some mocking library you can probably use any(Specification) . Otherwise you might be able to change the signature of any() to return a Specification or cast it to Specification .