ADD:: Friend remove methods and tests in server.User

build.gradle

@@ -18,9 +18,9 @@ apply plugin: 'org.springframework.boot'
 apply plugin: 'io.spring.dependency-management'
 apply plugin: 'application'
 
-application {
-    mainClassName = 'greenify.server.Application'
-}
+//application {
+//    mainClassName = 'greenify.server.Application'
+//}
 
 repositories {
     mavenCentral()

src/Server/src/main/java/greenify/server/data/model/User.java

@@ -208,6 +208,19 @@ public class User {
         }
     }
 
+    /**
+     * Removes a friend from the friendslist of the user.
+     * @param user the friend you want to remove.
+     */
+    public void removeFriend(User user) {
+        if (!friends.contains(user)) {
+            throw new ApplicationException("This user is not your friend!");
+        } else {
+            friends.remove(user);
+            System.out.print("Friend removed");
+        }
+    }
+
     /**
      * This method gets a human readable (JSON) object.
      * @return the JSON form of the object.

src/Server/src/test/java/greenify/server/data/model/UserTest.java

@@ -125,6 +125,27 @@ public class UserTest {
         });
     }
 
+    @Test
+    public void removeFriendValidTest() {
+        User test = new User(1L, "greenify", "password");
+        List<User> friendList = new ArrayList<>();
+        friendList.add(test);
+        User user = new User(1L, "green", "pass");
+        user.setFriends(friendList);
+        assertEquals(user.getFriends(), friendList);
+        user.removeFriend(test);
+        assertEquals(user.getFriends(), new ArrayList<User>());
+    }
+
+    @Test
+    public void removeFriendInvalidTest() {
+        User user = new User(1L, "greenify", "password");
+        User test = new User(2L, "user", "pass");
+        assertThrows(ApplicationException.class, () -> {
+            user.removeFriend(test);
+        });
+    }
+
     @Test
     public void setFriendTest() {
         List<User> friends = new ArrayList<User>();