ChallengeServiceImplTest.java

package microservices.book.multiplication.challenge;

import java.util.Optional;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;

import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

import microservices.book.multiplication.event.ChallengeSolvedEvent;
import microservices.book.multiplication.event.EventDispatcher;
import microservices.book.multiplication.user.User;
import microservices.book.multiplication.user.UserRepository;

import static org.assertj.core.api.BDDAssertions.then;
import static org.mockito.BDDMockito.*;

@ExtendWith(MockitoExtension.class)
public class ChallengeServiceImplTest {
    
  private ChallengeServiceImpl challengeServiceImpl;
  
  @Mock
  private ChallengeAttemptRepository attemptRepository;
  
  @Mock 
  private UserRepository userRepository;
  
  @Mock 
  private EventDispatcher eventDispatcher;
  
  @BeforeEach
  public void setUp() {
    challengeServiceImpl = new ChallengeServiceImpl(attemptRepository, userRepository, eventDispatcher);
  }
  
   @Test 
   public void checkCorrectAttemptTest() {
    
    // given
    long userId = 9 L, attemptId = 1 L;
    
    User user = new User("john_doe");
    User savedUser = new User(userId, "john_doe");
    
    ChallengeAttemptDTO attemptDTO = new ChallengeAttemptDTO(50, 60, "john_doe", 3000);
    ChallengeAttempt attempt = new ChallengeAttempt(null, savedUser, 50, 60, 3000, true);
    ChallengeAttempt storedAttempt = new ChallengeAttempt(attemptId, savedUser, 50, 60, 3000, true);
    ChallengeSolvedEvent event = new ChallengeSolvedEvent(attemptId, true, attempt.getFactorA(), attempt.getFactorB(), userId, attempt.getUser().getAlias());
    
    // user does not exist, should be created
    given(userRepository.findByAlias("john_doe")).willReturn(Optional.empty());
    given(userRepository.save(user)).willReturn(savedUser);
    given(attemptRepository.save(attempt)).willReturn(storedAttempt);
    
    // when
    ChallengeAttempt resultAttempt = challengeServiceImpl.checkAttempt(attemptDTO);
    
    // then
    then(resultAttempt.isCorrect()).isTrue();
    verify(userRepository).save(user);
    verify(attemptRepository).save(attempt);
    verify(eventDispatcher).send(event);
  }
}