public void TestChangeStudent() { TestStudentController = new StudentController("E:/NAU/TEST/data.dat"); for (var i = 0; i < 50; i++) { TestStudentController.AddStudent(new Student(i)); } TestStudentController.ChangeStudent( TestStudentController.GetStudent(43), new Student(90)); TestStudentController.ChangeStudent( TestStudentController.GetStudent(42), new Student(80)); Assert.AreEqual(90, TestStudentController.GetStudent(90).Id); Assert.AreEqual(80, TestStudentController.GetStudent(80).Id); }