Added some tests for friend methods

src/Client/src/main/java/greenify/client/rest/UserService.java

@@ -94,4 +94,18 @@ public class UserService {
                 .encode().toUri(), String.class);
         return result;
     }
+
+    @SuppressWarnings("Duplicates")
+    public String updaaddFriend(String name, String friend) {
+        HttpHeaders headers = new HttpHeaders();
+        headers.set("Accept", MediaType.APPLICATION_JSON_VALUE);
+        UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl("http://localhost:8080/setInput")
+                .queryParam("name", name)
+                .queryParam("friend",friend);
+        HttpEntity<?> entity = new HttpEntity<>(headers);
+        System.out.println(builder.build().encode().toUri());
+        String result = this.restTemplate.getForObject(builder.build()
+                .encode().toUri(), String.class);
+        return result;
+    }
 }

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

@@ -1,5 +1,6 @@
 package greenify.server.data.model;
 
+import greenify.common.ApplicationException;
 import greenify.server.InputValidator;
 import lombok.Data;
 
@@ -14,6 +15,7 @@ import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import javax.persistence.Table;
 import java.util.*;
+import java.util.logging.Logger;
 import javax.persistence.*;
 import javax.validation.constraints.NotNull;
 
@@ -57,6 +59,7 @@ public class User {
         this.name = name;
         this.password = password;
         this.setFootPrintInputs(InputValidator.getDefaultValues());
+        this.friends = new ArrayList<User>();
     }
 
     /**
@@ -115,6 +118,16 @@ public class User {
         return (ArrayList<User>)this.friends;
     }
 
+    public void addFriend(User user){
+        if(user.equals(this)){
+            throw new ApplicationException("Cannot add yourself as a friend");
+        }
+        else{
+            friends.add(user);
+            System.out.print("Friend added!");
+        }
+    }
+
     public void setFootPrint(Float footPrint) {
         this.footPrint = footPrint;
     }

src/Server/src/main/java/greenify/server/service/UserService.java

@@ -59,6 +59,21 @@ public class UserService {
         return new UserDto(user.getId(), user.getName());
     }
 
+    /**
+     * Adds a friend to the friendlist of the user.
+     * @param name the username of the user
+     * @param friend the name of the friend you want to add.
+     * @return a userDTO of the logged in user
+     */
+    public void addFriend(String name, String friend) {
+        User user = userRepository.findByName(name);
+        User add = userRepository.findByName(friend);
+        if (add == null) {
+            throw new ApplicationException("User does not exist");
+        }
+        user.addFriend(add);
+    }
+
     /**
      * The method sets input value.
      * @param name of the user

src/Server/src/main/resources/application.properties

@@ -2,5 +2,5 @@ spring.datasource.url=jdbc:h2:file:~/spring-boot-h2.db;DB_CLOSE_ON_EXIT=FALSE
 spring.datasource.username=sa
 spring.datasource.password=
 spring.datasource.driver-class-name=org.h2.Driver
-spring.jpa.hibernate.ddl-auto=create-drop
+spring.jpa.hibernate.ddl-auto=update
 spring.h2.console.enabled=true

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

@@ -6,6 +6,8 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import org.junit.Test;
 
+import java.util.ArrayList;
+
 public class UserTest {
     @Test
     public void setAndGetTest() {
@@ -78,5 +80,25 @@ public class UserTest {
         assertEquals(first, second);
         assertEquals(first.hashCode(), second.hashCode());
     }
+
+    @Test
+    public void getFriendEmpty(){
+        User first = new User(1L, "greenify", "password");
+        User second = new User(1L, "merel", "password");
+        assertEquals(first.getFriends(), second.getFriends());
+        assertEquals(first.getFriends(), new ArrayList<User>());
+    }
+
+    @Test
+    public void addFriend(){
+        User first = new User(1L, "greenify", "password");
+        User second = new User(1L, "merel", "password");
+        assertEquals(first.getFriends(), second.getFriends());
+        System.out.print(second);
+        first.addFriend(second);
+        ArrayList<User> test = new ArrayList<User>();
+        test.add(second);
+        assertEquals(first.getFriends(), test);
+    }
 }