test_User creation in CreateUser, fixed error in CreateUser (public String surname() and public void setSurname(String surname))

src/main/java/CreateUser.java

@@ -77,11 +77,11 @@ class CreateUser {
             }
             
             public String surname() {
-                return firstName;
+                return surname;
                 }
 
-                public void surname(String firstName) {
-                this.firstName = firstName;
+                public void setSurname(String surname) {
+                this.surname = surname;
                 }
         
         public boolean isStayLoggedIn() {

src/test/java/CreateUsertTest.java

@@ -0,0 +1,29 @@
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.Test;
+
+class CreateUsertTest {
+
+	@Test
+    public void testCreateUser() {
+    String id = "1";
+    String userName = "testUser";
+    String password = "password123";
+    String birthday = "2000-01-01";
+    String firstName = "John";
+    String surname = "Doe";
+
+    CreateUser user = new CreateUser(id, userName, password, birthday, firstName, surname);
+
+    assertEquals(id, user.getId());
+    assertEquals(userName, user.getUserName());
+    assertEquals(birthday, user.getBirthday());
+    assertEquals(firstName, user.getFirstName());
+    assertEquals(surname, user.surname());
+
+    // Password should be hashed
+    assertNotEquals(password, user.getPassword());
+    }
+
+
+}