public void TestChangeTeacher() { TestTeacherController = new TeacherController("E:/NAU/TEST/data.dat"); for (var i = 0; i < 50; i++) { TestTeacherController.AddTeacher(new Teacher(i)); } TestTeacherController.ChangeTeacher( TestTeacherController.GetTeacher(43), new Teacher(90)); TestTeacherController.ChangeTeacher( TestTeacherController.GetTeacher(42), new Teacher(80)); Assert.AreEqual(90, TestTeacherController.GetTeacher(90).Id); Assert.AreEqual(80, TestTeacherController.GetTeacher(80).Id); }