diff --git a/src/test/java/org/example/AdministrationTest.java b/src/test/java/org/example/AdministrationTest.java
index 819012e..647c024 100644
--- a/src/test/java/org/example/AdministrationTest.java
+++ b/src/test/java/org/example/AdministrationTest.java
@@ -2,6 +2,8 @@ package org.example;
 
 import org.junit.jupiter.api.Test;
 
+import java.util.List;
+
 import static org.junit.jupiter.api.Assertions.*;
 
 class AdministrationTest {
@@ -274,4 +276,119 @@ class AdministrationTest {
         }
 
 
+    @Test
+    void testEnrollProfInCourse() {
+        Administration administration = new Administration();
+
+        //Professor who is about to get enrolled in a course
+        Professor professor = new Professor("P1001", "Alex", "Professor" );
+        administration.addProfessor(professor);
+
+        //The "User input" to determine the professor
+        String profID = professor.getProfessorID();
+
+        //Course the professor is being enrolled in
+        Course course = new Course("Swag", "C101", 5);
+        administration.addCourse(course);
+
+        //The "User input" to determine the course
+        String courseID = course.getCourseID();
+
+
+        Professor professorFound = administration.findProfessorById(profID);
+        Course courseFound = administration.findCourseByID(courseID);
+
+        //Grabs the coursesTaught List from the Professor the user wants to enroll
+        List<Course> courseList = professorFound.getCoursesTaught();
+        //Assigning the course to the Prof by adding it the to the courseList
+        courseList.add(course);
+        //The Professor gets the updated courseList
+        professorFound.setCoursesTaught(courseList);
+
+        //Grabs the courseTaught List from the created Professor
+        List<Course> checkList = professor.getCoursesTaught();
+        boolean hasCourse = false;
+
+        //Checks if this List no contains the newly added course
+        for (Course courseSearch : checkList)
+        {
+            if(courseSearch.getCourseID() == courseID)
+            {
+                hasCourse = true;
+            }
+
+        }
+        //If true everything worked
+        assertTrue(hasCourse);
+
+
+    }
+
+    @Test
+    void registerUser() {
+        Administration administration = new Administration();
+        //Selects the userType
+        int userType = 1;
+
+        //Checks if the user Input correct; in this case its pre-determined
+        boolean correctData = false;
+        while(!correctData)
+        {
+            //User Input
+            String userName = "Tobias";
+            String userId = "S1010";
+
+            //Checks if the entered id is already being used
+            if(administration.findProfessorById(userId) != null || administration.findAdminById(userId) != null || administration.findStudentById(userId) != null) {
+
+            }
+            else if(administration.findProfessorById(userId) == null || administration.findAdminById(userId) == null || administration.findStudentById(userId) == null)
+            {
+                //the entered id is not used
+
+
+                if(!administration.rightPrefix(userId, userType))
+                {
+                    //the prefix is wrong
+
+                }
+                else if(!administration.isNumber(userId))
+                {
+                    //the substring does not contain only digits
+                    System.out.println("Every character besides the first one need to be digits");
+
+
+                }
+                else{
+                    //the id is not being used and has the right id-"syntax"
+                    System.out.println("The Id has not been used already!");
+                    correctData = true;
+                }
+
+            }
+
+            switch (userType)
+            {
+                case 1: //Student
+                    Student student = new Student(userName, userId, "Student");
+                    administration.addStudents(student);
+                    break;
+                case 2: //Admin
+                    Admin admin = new Admin(userName, userId, "Admin");
+                    administration.addAdmin(admin);
+                    break;
+                case 3: //Professor
+                    Professor professor = new Professor(userId, userName, "Professor");
+                    administration.addProfessor(professor);
+                default: //Error
+                    break;
+            }
+        }
+
+        //If All three are correct, the registerUser Function has been successful
+        assertEquals("Tobias", administration.findStudentById("S1010").getStudentName());
+        assertEquals("S1010", administration.findStudentById("S1010").getStudentId());
+        assertEquals("Student",administration.findStudentById("S1010").getStudentRole());
+
     }
+}