Parameterized Mocks example

gistfile1.java

import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.runners.MockitoJUnitRunner;

@RunWith(MockitoJUnitRunner.class)
public class ParameterizedMocks {
    @Mock
    private UserService userService;

    @Mock
    private UserManager userManager;

    @Test
    public void testCountNumberOfInteractions() throws Exception {
        // Given
        String[] userNames = {"",
                "user1",
                "user2"};
        User[] users = { null,
                new User("user1"),
                new User("user2")
        };

        // When...Then
        int index = 0;
        while (index < userNames.length) {
            String eachUsername = userNames[index];
            User eachUser = users[index];

            performFindUserSanityCheck(eachUsername, eachUser);

            index++;
        }
    }

    private void performFindUserSanityCheck(String userName, User expectedUser) {
        User user = userManager.findUser(userName);

        //Verify the number of interactions with mock
        Mockito.verify(userService, Mockito.times(1)).findUserByName(userName);

        //There was only one interaction with userService
        Mockito.verifyNoMoreInteractions(userService);

        //assertThat(user, is(equalTo(expectedUser)));
    }
}