public void TestAddDeleteToDatabaseStudent() { Student student = new Student() { Id = 12, Name = "Юрий", SurName = "Корнеев", Patronymic = "Олегович", DateBr = new DateTime(2002, 4, 2), Sex = "Муж", Group = "ИТП-21", ExamName_1 = "ООП", ExamName_2 = "КС", ExamName_3 = "Экономика", ExamDate_1 = new DateTime(2021, 1, 12), ExamDate_2 = new DateTime(2021, 1, 14), ExamDate_3 = new DateTime(2021, 1, 16), Mark_1 = 7, Mark_2 = 8, Mark_3 = 6 }; AddToDataBase add = new AddToDataBase(); add.AddNewStudent(student); DataContext db = new DataContext(connectionString); Student st = db.GetTable <Student>().OrderByDescending(u => u.Id).FirstOrDefault(); var except_EndElement = true; var actual_EndElement = student.Equals(st); DeleteToDataBase del = new DeleteToDataBase(); del.DeleteEndStudent(); st = db.GetTable <Student>().OrderByDescending(u => u.Id).FirstOrDefault(); var except_EndElement_2 = false; var actual_EndElement_2 = student.Equals(st); Assert.AreEqual(except_EndElement, actual_EndElement); Assert.AreEqual(except_EndElement_2, actual_EndElement_2); }