public void Test_DropMajor_DropsSelectedMajor()
{
Student testStudent = new Student("Bob", enrollmentDate);
testStudent.Save();
Department testDepartment1 = new Department("Chinese");
testDepartment1.Save();
testStudent.AddMajor(testDepartment1.GetId());
Department testDepartment2 = new Department("Spanish");
testDepartment2.Save();
testStudent.AddMajor(testDepartment2.GetId());
testStudent.DropMajor(testDepartment1.GetId());
List<Department> resultList = testStudent.GetMajors();
List<Department> expectedList= new List<Department>{testDepartment2};
Assert.Equal(expectedList, resultList);
}
