public void TeacherCreateTest()
        {
            ml.CreateTeachers(new Teachers()
            {
                Teacher_Id   = 4,
                School_Id    = 2,
                Name         = "Lakatos Franciska",
                Salary       = 600,
                StartYear    = 2019,
                WellLiked    = true,
                CourseNumber = 25,
                HealthCare   = "f****d"
            });

            mockteacherrepo.Verify(v => v.Create(It.IsAny <Teachers>()));
        }
        /// <summary>
        /// You can select Teachers CRUD methods here.
        /// </summary>
        /// <param name="ml">Business Logic.</param>
        /// <param name="fields">Field names of the selected table.</param>
        private static void MenuLowerLayerTeachers(MainLogic ml, List <string> fields)
        {
            Console.Clear();
            Console.WriteLine("What do you want to do?");
            Console.WriteLine("[1] Create");
            Console.WriteLine("[2] Read");
            Console.WriteLine("[3] ReadAll");
            Console.WriteLine("[4] Update");
            Console.WriteLine("[5] Delete");
            Console.WriteLine();
            Console.Write("Your choice: ");
            string crudchoice = Console.ReadLine();

            Console.Clear();
            switch (crudchoice)
            {
            case "1":
                List <string> createTemp = DataGather(fields.Count, fields);
                Teachers      t          = new Teachers
                {
                    Teacher_Id   = int.Parse(createTemp.ElementAt(0)),
                    School_Id    = int.Parse(createTemp.ElementAt(1)),
                    Name         = createTemp.ElementAt(2),
                    Salary       = int.Parse(createTemp.ElementAt(3)),
                    StartYear    = int.Parse(createTemp.ElementAt(4)),
                    WellLiked    = bool.Parse(createTemp.ElementAt(5)),
                    CourseNumber = int.Parse(createTemp.ElementAt(6)),
                    HealthCare   = createTemp.ElementAt(7),
                };
                ml.CreateTeachers(t);
                break;

            case "2":
                int id       = IDGather();
                var readTemp = ml.ReadTeachers(id);
                Console.WriteLine(readTemp.Teacher_Id + " | " + readTemp.School_Id + " | " + readTemp.Name + " | " + readTemp.Salary + " | " + readTemp.StartYear + " | " + readTemp.WellLiked + " | " + readTemp.CourseNumber + " | " + readTemp.HealthCare);
                break;

            case "3":
                var ownerLogicTemp = ml.ReadAllTeachers();
                foreach (var item in ownerLogicTemp)
                {
                    Console.WriteLine(item.Teacher_Id + " | " + item.School_Id + " | " + item.Name + " | " + item.Salary + " | " + item.StartYear + " | " + item.WellLiked + " | " + item.CourseNumber + " | " + item.HealthCare);
                }

                Console.Write("Press any button to continue...");
                Console.ReadLine();
                break;

            case "4":
                var      updateTemp = DataGather(fields.Count, fields);
                Teachers t2         = new Teachers
                {
                    Teacher_Id   = int.Parse(updateTemp.ElementAt(0)),
                    School_Id    = int.Parse(updateTemp.ElementAt(1)),
                    Name         = updateTemp.ElementAt(2),
                    Salary       = int.Parse(updateTemp.ElementAt(3)),
                    StartYear    = int.Parse(updateTemp.ElementAt(4)),
                    WellLiked    = bool.Parse(updateTemp.ElementAt(5)),
                    CourseNumber = int.Parse(updateTemp.ElementAt(6)),
                    HealthCare   = updateTemp.ElementAt(7),
                };
                ml.UpdateTeachers(t2);
                break;

            case "5":
                var deleteTemp = IDGather();
                ml.DeleteTeachers(deleteTemp);
                break;
            }
        }