I have been trying to get simple test cases to work without success. They're just giving a null pointer error:
java.lang.NullPointerException
Example:
@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = SpringCrudApplication.class)
public class ServiceTest {
UserService userService;
@Autowired
public void setUserService(UserService userService) {
this.userService = userService;
}
@Test
public void findUserByIdTest() throws Exception {
long id = (long) 0;
User user = new User();
user.setId(id);
user.setAddress("main st");
user.setEmail("drew@gmail.com");
user.setUsername("Drew");
System.out.println("Name: "+user.getUsername()+" ID: "+user.getId()); //this is printing
userService.saveUser(user);
User userTest = userService.findUserById(id);
System.out.println("Username="+userTest.getUsername());
assertEquals("Drew", userTest.getUsername());
}
I am getting the following output in the console:
Name: Drew ID: 0
However once it gets to:
userService.saveUser(user);
the null pointer is created.
Here is the method being tested:
public class UserServiceImpl implements UserService {
private static final AtomicLong counter = new AtomicLong();
private static List<User> users;
static {
users = populateDummyUsers();
}
@Override
public User findUserById(Long id) {
for (User user : users) {
if (user.getId() == id) {
return user;
}
}
return null;
}
@Override
public void saveUser(User user) {
if(user != null) {
user.setId(counter.incrementAndGet());
users.add(user);
}
}
