public void TeacherControllerCreateExamTest()
        {
            //Arrange
            var examAccess = new Mock <ExamAccess>(new DBAccess());

            examAccess.Setup(t => t.InsertExamToDB(It.IsAny <Exam>(), It.IsAny <int>()));

            Teacher           teacher           = new Teacher("Petro", "Petrov", "ID", "petrov");
            ResultAccess      resultAccess      = new ResultAccess(new DBAccess());
            StudentAccess     studentAccess     = new StudentAccess(new DBAccess());
            TeacherController teacherController = new TeacherController(teacher, resultAccess, studentAccess, examAccess.Object);

            Question question1 = new Question("Some question1", "Correct answer1", new List <String> {
                "Answer11", "Answer12"
            });
            Question question2 = new Question("Some question2", "Correct answer2", new List <String> {
                "Answer21", "Answer22"
            });
            List <Question> questions = new List <Question> {
                question1, question2
            };
            Subject subject = new Subject("Subject");

            //Act
            bool isExamCreated = teacherController.CreateExam("SomeExam", 1, 3, questions, subject);

            //Assert
            Assert.IsTrue(isExamCreated);
        }