test for equals and hash code in group entity

src/main/java/ntnu/idatt2016/v233/SmartMat/entity/group/Group.java

@@ -82,4 +82,29 @@ public class Group {
     @JsonIgnoreProperties({"groups"})
     private List<Achievement> achievements;
 
+    /**
+     * Checks if two objects are equal
+     * @param o the object to compare to
+     * @return true if the objects are equal, false otherwise
+     */
+    @Override
+    public boolean equals(Object o){
+        if(o == this){
+            return true;
+        }
+        if(!(o instanceof Group group)){
+            return false;
+        }
+        return group.getGroupId() == this.getGroupId();
+    }
+
+    /**
+     * Gets the hashcode of the object
+     * @return the hashcode of the object
+     */
+    @Override
+    public int hashCode(){
+        return Long.hashCode(this.getGroupId());
+    }
+
 }

src/test/java/ntnu/idatt2016/v233/SmartMat/controller/group/GroupControllerTest.java

@@ -282,7 +282,7 @@ public class GroupControllerTest {
 
         assertSame(HttpStatus.FORBIDDEN, groupResponseEntity.getStatusCode());
         assertNull(groupResponseEntity.getBody());
-    }
-    
+ }
+
 
 }
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src/test/java/ntnu/idatt2016/v233/SmartMat/entity/group/GroupTest.java

+package ntnu.idatt2016.v233.SmartMat.entity.group;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class GroupTest {
+
+    @Test
+    void testEquals() {
+        Group group = Group.builder()
+                .groupName("Test Group")
+                .groupId(1L)
+                .build();
+
+        Group group2 = Group.builder()
+                .groupId(2L)
+                .groupName("Test Group2")
+                .build();
+
+
+        assertEquals(group, group);
+        assertNotEquals(group, group2);
+        assertNotEquals("hello", group);
+    }
+
+    @Test
+    void testHashCode() {
+        Group group = Group.builder()
+                .groupName("Test Group")
+                .groupId(1L)
+                .build();
+
+        Group group2 = Group.builder()
+                .groupId(2L)
+                .groupName("Test Group2")
+                .build();
+
+        assertEquals(group.hashCode(), group.hashCode());
+        assertNotEquals(group.hashCode(), group2.hashCode());
+    }
+
+    @Test
+    void testToString() {
+        Group group = Group.builder()
+                .groupName("Test Group")
+                .groupId(1L)
+                .build();
+
+        assertEquals("Group(groupId=1, level=0, points=0, groupName=Test Group, linkCode=null, open=null, shoppingList=null, user=null, fridge=null, achievements=null)",
+                group.toString());
+    }
+}
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