fixes - spelling and security work

Author: eugenp

guava/src/test/java/org/baeldung/guava/GuavaCollectionTypesTest.java

@@ -149,7 +149,7 @@ public void whenCalculatingSetIntersection_thenCorrect() {
     }
 
     @Test
-    public void whenCalculatingSetSymetricDifference_thenCorrect() {
+    public void whenCalculatingSetSymmetricDifference_thenCorrect() {
         final Set<Character> first = ImmutableSet.of('a', 'b', 'c');
         final Set<Character> second = ImmutableSet.of('b', 'c', 'd');
 

spring-security-login-and-registration/src/main/java/org/baeldung/security/MyUserDetailsService.java

@@ -1,13 +1,11 @@
 package org.baeldung.security;
 
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
 
 import javax.servlet.http.HttpServletRequest;
 
-import org.baeldung.persistence.dao.RoleRepository;
 import org.baeldung.persistence.dao.UserRepository;
 import org.baeldung.persistence.model.Privilege;
 import org.baeldung.persistence.model.Role;
@@ -28,9 +26,6 @@ public class MyUserDetailsService implements UserDetailsService {
     @Autowired
     private UserRepository userRepository;
 
-    @Autowired
-    private RoleRepository roleRepository;
-
     @Autowired
     private LoginAttemptService loginAttemptService;
 
@@ -53,7 +48,7 @@ public UserDetails loadUserByUsername(final String email) throws UsernameNotFoun
         try {
             final User user = userRepository.findByEmail(email);
             if (user == null) {
-                return new org.springframework.security.core.userdetails.User(" ", " ", true, true, true, true, getAuthorities(Arrays.asList(roleRepository.findByName("ROLE_USER"))));
+                throw new UsernameNotFoundException("No user found with username: " + email);
             }
 
             return new org.springframework.security.core.userdetails.User(user.getEmail(), user.getPassword(), user.isEnabled(), true, true, true, getAuthorities(user.getRoles()));
@@ -90,8 +85,9 @@ private final List<GrantedAuthority> getGrantedAuthorities(final List<String> pr
 
     private String getClientIP() {
         final String xfHeader = request.getHeader("X-Forwarded-For");
-        if (xfHeader == null)
+        if (xfHeader == null) {
             return request.getRemoteAddr();
+        }
         return xfHeader.split(",")[0];
     }
 }