<How can mock repository.findAll().stream().map{}....

# stackoverflow

[user]

How can mock repository.findAll().stream().map{}.filter{}
I'm having trouble mocking my unit test. I can only mock findAll, but I am not able to mock findAll along with the other methods, stream, map and filter. What would the correct form of the syntax look like:
whenever(productRerpository.findAll).thenReturn(product)?
Below is my function inside the service class.
fun getProductList(userId: Int?, filter: ProductBaseFilter): List {
val productCompleteDtoList = productRepository.findAll()
.stream()
.map {...