add ChangeUserNameEvent and add UserServiceTest

fh.fd.ci.server/src/main/java/de/fd/fh/server/user/UserId.java

@@ -6,7 +6,6 @@ import org.bson.types.ObjectId;
 
 @Getter
 @Embedded
-@NoArgsConstructor
 @AllArgsConstructor(access = AccessLevel.PRIVATE)
 @EqualsAndHashCode(of = {"identifier"})
 public class UserId

fh.fd.ci.server/src/main/java/de/fd/fh/server/user/UserService.java

@@ -1,6 +1,7 @@
 package de.fd.fh.server.user;
 
 import de.fd.fh.server.user.events.ChangePasswordEvent;
+import de.fd.fh.server.user.events.ChangeUserNameEvent;
 import de.fd.fh.server.user.web.ChangeUserRequest;
 import de.fd.fh.server.user.web.UserRequest;
 import lombok.RequiredArgsConstructor;
@@ -14,8 +15,6 @@ public class UserService extends Observable
 
     public User changePlayer(final UserId userId, final ChangeUserRequest message)
     {
-        System.out.println("changePlayer: " + message);
-
         User user = userRepository.findUserById(userId);
 
         if (message.getPassword() != null)
@@ -24,9 +23,19 @@ public class UserService extends Observable
             notifyObservers(new ChangePasswordEvent(userId, message.getPassword()));
         }
 
-        userRepository.save(user);
+        if (message.getName() != null)
+        {
+            if (userRepository.findUserByName(message.getName()) == null)
+            {
+                user.rename(message.getName());
+                userRepository.save(user);
+
+                setChanged();
+                notifyObservers(new ChangeUserNameEvent(userId, message.getName()));
+            }
+        }
 
-        return userRepository.findUserById(userId);
+        return user;
     }
 
     public User getPlayer(final UserId id)

fh.fd.ci.server/src/main/java/de/fd/fh/server/user/events/ChangeUserNameEvent.java

@@ -0,0 +1,14 @@
+package de.fd.fh.server.user.events;
+
+import de.fd.fh.server.user.UserId;
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+@Getter
+public class ChangeUserNameEvent
+{
+    private final UserId userId;
+
+    private final String newName;
+}

fh.fd.ci.server/src/main/java/de/fd/fh/server/user/web/ChangeUserRequest.java

@@ -1,13 +1,15 @@
 package de.fd.fh.server.user.web;
 
+import lombok.AllArgsConstructor;
 import lombok.Getter;
-import lombok.RequiredArgsConstructor;
+import lombok.NoArgsConstructor;
 
-@RequiredArgsConstructor
+@NoArgsConstructor
+@AllArgsConstructor
 @Getter
 public class ChangeUserRequest
 {
-    private final String name;
+    private String name;
 
-    private final String password;
+    private String password;
 }

fh.fd.ci.server/src/test/java/de/fd/fh/server/user/UserServiceTest.java

@@ -9,8 +9,10 @@ import org.mockito.ArgumentCaptor;
 import java.util.Observable;
 import java.util.Observer;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.BDDMockito.then;
 import static org.mockito.Mockito.*;
 
 class UserServiceTest implements Observer
@@ -29,19 +31,45 @@ class UserServiceTest implements Observer
         final User user =
                 User.of("testName");
         final ChangeUserRequest request =
-                new ChangeUserRequest("testName", "newPassword");
+                new ChangeUserRequest(null, "newPassword");
         final UserRepository repository = mock(UserRepository.class);
         when(repository.findUserById(any(UserId.class)))
                 .thenReturn(user);
 
-        final UserService service = new UserService(repository);
+        final de.fd.fh.server.user.UserService service = new de.fd.fh.server.user.UserService(repository);
+        service.addObserver(this);
+
+        service.changePlayer(UserId.of("12345"), request);
+
+        assertNotNull(event);
+    }
+
+    @Test
+    void given_storedUser_when_changeUserName_should_renameAndFireEvent()
+    {
+        final User user =
+                User.of("testName");
+        final ChangeUserRequest request =
+                new ChangeUserRequest("newTestName", null);
+        final UserRepository repository = mock(UserRepository.class);
+        when(repository.findUserById(any(UserId.class)))
+                .thenReturn(user);
+        when(repository.findUserByName(any()))
+                .thenReturn(null);
+
+        final de.fd.fh.server.user.UserService service = new de.fd.fh.server.user.UserService(repository);
         service.addObserver(this);
         final ArgumentCaptor<User> captor = ArgumentCaptor.forClass(User.class);
 
         service.changePlayer(UserId.of("12345"), request);
-        verify(repository).save(captor.capture());
 
+        then(repository).should().findUserById(any(UserId.class));
+        then(repository).should().findUserByName(any());
+        verify(repository).save(captor.capture());
+        then(repository).should().save(any());
+        then(repository).shouldHaveNoMoreInteractions();
         assertNotNull(captor.getValue(), "Should be saved");
+        assertEquals(captor.getValue().getName(), "newTestName", "User should have new name");
         assertNotNull(event);
     }
 
@@ -68,7 +96,7 @@ class UserServiceTest implements Observer
         when(repository.findUserById(any(UserId.class)))
                 .thenReturn(user);
 
-        final UserRequest result = new UserService(repository).getSmallPlayer(UserId.of("12345"));
+        final UserRequest result = new de.fd.fh.server.user.UserService(repository).getSmallPlayer(UserId.of("12345"));
 
         assertNotNull(result);
         assertEquals("12345", result.getId(), "Wrong UserId");