如何模拟返回`Mono的方法<Void> `

Question

How to mock a method that returns Mono<Void> ?

I have this method that returns Mono<Void>

public Mono<Void> deleteMethod(Post post) {

        return statusRepository.delete(post);
    }

In my test class I want to do something like this

given(statusRepository.delete(any(Post.class))).willReturn(Mono.empty());

Is there any better way to do this?

Can someone help me?

Thanks.

Answer 1

This is possible using Mockito.when :

Mockito.when(statusRepository.delete(any(Post.class)).thenReturn(Mono.empty());

...call the method and verify...

Mockito.verify(statusRepository).delete(any(Post.class));

Answer 2

I was also able to do this without using Mono.empty so the reactive chain would complete by creating a mock object of type void. Below is a code example (written in Kotlin and using mockito-kotlin, but should be applicable to mockito as well):

val mockVoid: Void = mock()

whenever(statusRepository.delete(any(Post::class.java)).thenReturn(mockVoid)

Answer 3

当我不想得到一个空的单声道时，我会这样做。

when(statusRepository.delete(any(Post.class))).thenReturn(Mono.just("").then());