initializeError while Unit-testing Mock objects with Mockito in Xtend - unit-testing

Question

I'm trying to run this unit test, I'm currently using Xtend over Java in order to read the code easily.
The test consist on an admin who must verify a user in order to add it or not to the current repository. I want to make that admin a mock object in order to verify if the user has send correctly the method "generateProfile", which do the following
class User{
#Accessors
repositoryAdministrator admin
def generateProfile{
admin.add(this)
}
the method add is the following:
class repositoryAdministrator{
#Accessors List<User> objects
#Accessors List<User> usersToValidate
def add(User user){
usersToValidate.add(user)
}
This is the test i want to run using the lib Mockito
#RunWith(MockitoJUnitRunner)
class MockitoTests{
val lala = new User()
#Mock
repositoryAdministrator fakeAdmin
#Before
def void init(){
MockitoAnnotations.initMocks(this)
}
#Test
def validationTest(){
lala.admin = fakeAdmin
lala.generateProfile
Mockito.verify(fakeAdmin).add(lala)
}
}
I have imported correctly the libraries, I'm working on an Eclipse IDE, and when i run the test I keep on getting initializationError.
How do I properly initialize a mock object using Mockito? Sorry for my English

Answer 1

I've already found the problem, test using Xtend are not necessary to define the return type... Until you implement Mockito dependencies on a Maven proyect. There was a problem in the add method of the admin, it return a bool variable and it should return void, the way to fix it was:
#RunWith(MockitoJUnitRunner)
class MockitoTests{
val lala = new User()
#Mock
repositoryAdministrator fakeAdmin
#Before
def void init(){
MockitoAnnotations.initMocks(this)
}
#Test
def void validationTest(){
lala.admin = fakeAdmin
lala.generateProfile
Mockito.verify(fakeAdmin).add(lala)
}
}
I only define the return type in the test, which should be in this case void