first commit

src/com/university/Course.java

+package com.university;
+
+import java.util.ArrayList;
+
+public class Course {
+
+    String ID;
+    String name;
+    Department department;
+    Professor professor;
+    int credit;
+
+    public Course(String ID, String name, Department department, Professor professor, int credit) {
+        this.ID = ID;
+        this.name = name;
+        this.department = department;
+        this.professor = professor;
+        this.credit = credit;
+    }
+
+    public String getID(){
+        return this.ID;
+    }
+
+    public Department getDepartment(){
+        return department;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public ArrayList<Student> getStudents() {
+        return students;
+    }
+
+    public Professor getProfessor() {
+        return professor;
+    }
+
+    public int getCredit() {
+        return credit;
+    }
+
+    ArrayList<Student> students = new ArrayList<>();
+
+    public void enrollStudent(Student student){
+        students.add(student);
+
+    }
+
+}

src/com/university/Department.java

+package com.university;
+
+import java.util.ArrayList;
+
+public class Department {
+
+    String name;
+
+    public Department(String name) {
+        this.name = name;
+    }
+
+    public String getName(){
+        return this.name;
+    }
+
+    ArrayList<Student> depStudent = new ArrayList<>();
+    ArrayList<Course> depCourses = new ArrayList<>();
+    ArrayList<Professor> depProfessor = new ArrayList<>();
+
+    public void addStudent(Student student){
+        depStudent.add(student);
+    }
+
+    public ArrayList<Student> getStudents(){
+        return depStudent;
+    }
+
+    public void removeStudent(Student student){
+        depStudent.remove(student);
+    }
+
+    public void addCourse(Course course){
+        depCourses.add(course);
+    }
+
+    public ArrayList<Course> getCourses(){
+        return depCourses;
+    }
+
+    public void removeCourse(Course course){
+        depCourses.remove(course);
+    }
+
+    public void addProfessor(Professor prof){
+        depProfessor.add(prof);
+
+    }
+
+    public ArrayList<Professor> getProfessors(){
+        return depProfessor;
+    }
+
+    public void removeProfessor(Professor professor){
+        depProfessor.remove(professor);
+    }
+}

src/com/university/Professor.java

+package com.university;
+
+import java.util.ArrayList;
+
+public class Professor {
+
+    Department department;
+    String name;
+
+    public Professor(Department department, String name) {
+        this.department = department;
+        this.name = name;
+    }
+
+    public Department getDepartment() {
+        return this.department;
+    }
+
+    public String getName() {
+        return this.name;
+    }
+
+    ArrayList<Course> profCourse = new ArrayList<>();
+
+    public ArrayList<Course> getCourses() {
+        return profCourse;
+    }
+}

src/com/university/Student.java

+package com.university;
+
+import java.util.ArrayList;
+
+public class Student {
+    String name;
+    String ID;
+    String major;
+    Department department;
+
+    public Student(String name, String ID, String major, Department department) {
+        this.name = name;
+        this.ID = ID;
+        this.major = major;
+        this.department = department;
+
+    }
+
+    public String getName() {
+        return this.name;
+    }
+
+    public String getID() {
+        return ID;
+    }
+
+    public String getMajor() {
+        return major;
+    }
+
+    public Department getDepartment() {
+        return department;
+    }
+
+    ArrayList<Course>  courses= new ArrayList<Course>();
+
+    public ArrayList getCourses() {
+        return courses;
+    }
+
+    public void addCourse(Course course){
+        courses.add(course);
+
+    }
+}

src/com/university/University.java

+package com.university;
+
+import java.util.ArrayList;
+
+public class University {
+
+    ArrayList<Department> uniDep = new ArrayList<>();
+
+    public ArrayList<Department> getDepartments(){
+        return uniDep;
+    }
+
+    public void addDepartment(Department department){
+        uniDep.add(department);
+    }
+
+    public void removeDepartment(Department department){
+        uniDep.remove(department);
+    }
+}

src/test/CourseTest.java

+package test;
+
+import com.university.Course;
+import com.university.Department;
+import com.university.Professor;
+import com.university.Student;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class CourseTest {
+
+    static Department dep;
+    static Professor prof;
+    static Course myCourse;
+    static Student st;
+    @BeforeAll
+    public static void createCourse(){
+
+        dep = new Department("comp");
+        prof = new Professor(dep, "ali");
+        myCourse = new Course("123","karga",dep,prof,5);
+        st = new Student("Ali","1234","ce",dep);
+
+    }
+
+    @Test
+    public void testCourse(){
+
+        assertEquals("karga",myCourse.getName());
+        assertEquals("123",myCourse.getID());
+        assertEquals(5,myCourse.getCredit());
+        assertEquals(dep,myCourse.getDepartment());
+        assertEquals(prof,myCourse.getProfessor());
+//        assertEquals(st,myCourse.getStudents());
+
+    }
+
+}
\ No newline at end of file

src/test/DepartmentTest.java

+package test;
+
+import com.university.Course;
+import com.university.Department;
+import com.university.Professor;
+import com.university.Student;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class DepartmentTest {
+
+    static Department myDep;
+    static Student s1;
+    static Course myCourse;
+    static Professor prof;
+
+    @BeforeAll
+    public static void createDepartment(){
+
+        myDep = new Department("ce");
+        s1 = new Student("Ali","1234","ce",myDep);
+        myCourse = new Course("123","az",myDep,prof,123);
+        prof = new Professor(myDep, "ali");
+        myDep.addCourse(myCourse);
+        myDep.addProfessor(prof);
+        myDep.addStudent(s1);
+    }
+
+    @Test
+    public void check(){
+
+        assertEquals("ce",myDep.getName());
+        assertEquals(myCourse,myDep.getCourses().get(0));
+        assertEquals(prof,myDep.getProfessors().get(0));
+        assertEquals(s1,myDep.getStudents().get(0));
+        myDep.removeCourse(myCourse);
+        myDep.removeProfessor(prof);
+        myDep.removeStudent(s1);
+        assertNull(myDep.getCourses());
+        assertEquals(0,myDep.getStudents().get(0));
+        assertEquals(0,myDep.getProfessors().get(0));
+
+    }
+
+}
\ No newline at end of file

src/test/ProfessorTest.java

+package test;
+
+import com.university.Course;
+import com.university.Department;
+import com.university.Professor;
+import com.university.Student;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class ProfessorTest {
+
+    static Department myDep;
+    static Student s1;
+    static Course myCourse;
+    static Professor prof;
+
+    @BeforeAll
+    public static void createProfesor(){
+
+        myDep = new Department("ce");
+        s1 = new Student("Ali","1234","ce",myDep);
+        myCourse = new Course("123","az",myDep,prof,123);
+        prof = new Professor(myDep, "ali");
+        myDep.addCourse(myCourse);
+        myDep.addProfessor(prof);
+        myDep.addStudent(s1);
+    }
+
+    @Test
+    public void testProfesor(){
+
+        assertEquals("ali",prof.getName());
+        assertEquals(myDep,prof.getDepartment());
+
+    }
+
+}
\ No newline at end of file

src/test/StudentTest.java

+package test;
+
+import com.university.Course;
+import com.university.Department;
+import com.university.Professor;
+import com.university.Student;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class StudentTest {
+
+    static Student s1;
+    static Department dep1;
+    static Course myCourse;
+    static Professor prof;
+    @BeforeAll
+    public static void creatStudent(){
+        dep1 = new Department("aut");
+        s1 = new Student("Ali","1234","ce",dep1);
+        myCourse = new Course("123","az",dep1,prof,123);
+        s1.addCourse(myCourse);
+    }
+
+    @Test @DisplayName("name check")
+    public void testName(){
+        assertEquals("Ali",s1.getName());
+        assertEquals("1234",s1.getID());
+        assertEquals("ce",s1.getMajor());
+        assertEquals(dep1,s1.getDepartment());
+        assertEquals(myCourse,s1.getCourses().get(0));
+
+    }
+
+}
\ No newline at end of file

src/test/UniversityTest.java

+package test;
+
+import com.university.*;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class UniversityTest {
+
+    static Department myDep;
+    static Student s1;
+    static Course myCourse;
+    static Professor prof;
+    static University u;
+
+    @BeforeAll
+    public static void createProfesor(){
+
+        myDep = new Department("ce");
+        u.addDepartment(myDep);
+
+    }
+
+    @Test
+    public void tetsUniversity(){
+
+        assertEquals(myDep,u.getDepartments());
+        u.removeDepartment(myDep);
+        assertEquals(0,u.getDepartments().get(0));
+    }
+
+}
\ No newline at end of file