How do I use Mockito in Kotlin?

How do I use Mockito in Kotlin?

You can use Mockito in Kotlin by adding the Mockito library to your project and using its features to create mocks.

Can you show me a simple example of mocking a class?

Sure! Here's a basic example:

class UserService(val userRepository: UserRepository) {
    fun getUser(id: String): User? {
        return userRepository.findById(id)
    }
}

val mockRepository = mock(UserRepository::class.java)
`mockRepository.findById("123")` returns User("John")

val userService = UserService(mockRepository)
val user = userService.getUser("123")

What if I want to verify that a method was called?

You can use the verify function in Mockito. For example:

verify(mockRepository).findById("123")
``` This checks if `findById` was called with the argument "123".

Are there any specific annotations I should use in Kotlin?

Yes, you can use @Mock and @InjectMocks annotations with Mockito's Kotlin extensions to simplify your tests.