How do you test a method that calls another method...

# android

[Nikola Milovic]

How do you test a method that calls another method with Junit5 and mockk? I tried googling but no luck. The SUT has a method that after some logic, calls other method. How can i verify that the method was called without calling it? As I want to keep it a unit test. Can i mock the method somehow?

[Raul Tunduc]

yes, you can mock that method to with when and then

[Raul Tunduc]

for example:

val mockBookService = Mockito.mock(BookService::class.java)
Mockito.`when`(mockBookService. inStock(100)).thenReturn(true)

[Nikola Milovic]

Okay, but for example

fun a() {
If(logic) {b()}
}
}

The both methods are in the SUT which is not mocked
The b() contains logic and dont want to execute it just to confirm its called

[Nikola Milovic]

Fuck on mobile couldnt make code block😂 sorry

[Raul Tunduc]

yes. Before calling function a() you can write smth like this:

Mockito.`when`(b()).thenReturn(true)

and that’s all.
That method will not be executed, only it will return true 🤷‍♂️

[Nikola Milovic]

Thanks !! That is what I am looking for

[Nikola Milovic]

Just a quick question @Raul Tunduc, is this possible with mockk, not mockito

[Raul Tunduc]

I don’t know. Check their documentation.