Added arch unit tests

src/main/java/auth_service/configuration/security/JwtService.java

@@ -1,6 +1,5 @@
 package auth_service.configuration.security;
 
-import auth_service.domain.login.model.User;
 import io.jsonwebtoken.Jwts;
 import io.jsonwebtoken.security.Keys;
 import org.springframework.stereotype.Service;
@@ -29,9 +28,9 @@ public class JwtService {
      *
      * @return A signed JWT string
      */
-    public String generateToken(User user) {
+    public String generateToken(String email) {
         return Jwts.builder()
-                .subject(user.getEmail())
+                .subject(email)
                 .issuedAt(new Date(System.currentTimeMillis()))
                 .expiration(new Date(System.currentTimeMillis() + JWT_EXPIRATION_MS))
                 .signWith(getSigningKey())

src/main/java/auth_service/domain/login/controller/LoginController.java

@@ -1,5 +1,6 @@
 package auth_service.domain.login.controller;
 
+import auth_service.configuration.security.JwtService;
 import auth_service.domain.login.controller.dto.request.LoginRequest;
 import auth_service.domain.login.controller.dto.response.LoginResponse;
 import auth_service.domain.login.controller.mapper.ApiMapper;
@@ -21,6 +22,7 @@ import org.springframework.web.bind.annotation.RestController;
 public class LoginController {
 
     private final LoginService loginService;
+    private final JwtService jwtService;
 
     /**
      * Authenticates a user based on email and password.
@@ -33,7 +35,9 @@ public class LoginController {
     public ResponseEntity<LoginResponse> login(@RequestBody LoginRequest request) {
 
         var user = ApiMapper.toModel(request);
-        var jwt = loginService.login(user);
-        return ResponseEntity.ok(new LoginResponse("Login successful", jwt));
+        var authenticatedUser = loginService.login(user);
+        var token = jwtService.generateToken(authenticatedUser.getEmail());
+
+        return ResponseEntity.ok(new LoginResponse("Login successful", token));
     }
 }

src/main/java/auth_service/domain/login/service/LoginService.java

@@ -1,6 +1,5 @@
 package auth_service.domain.login.service;
 
-import auth_service.configuration.security.JwtService;
 import auth_service.domain.login.exception.InvalidCredentialsException;
 import auth_service.domain.login.exception.UserNotFoundException;
 import auth_service.domain.login.model.User;
@@ -16,15 +15,19 @@ import org.springframework.stereotype.Service;
 public class LoginService {
     private final MinimalUserRepository minimalUserRepository;
     private final PasswordEncoder passwordEncoder;
-    private final JwtService jwtService;
 
-    public String login(User userToLogin) {
+    /**
+     * Authenticates a user based on email and raw password.
+     *
+     * @return The authenticated User model
+     */
+    public User login(User userToLogin) {
         var userFromDatabase = minimalUserRepository.findByEmail(userToLogin.getEmail()).orElseThrow(() -> new UserNotFoundException("User not found with given email"));
         var loginSuccessful = passwordEncoder.matches(userToLogin.getPassword(), userFromDatabase.getPassword());
         if (!loginSuccessful) {
             throw new InvalidCredentialsException("Invalid credentials");
         }
 
-        return jwtService.generateToken(userToLogin);
+        return userFromDatabase;
     }
 }