public void GetAllTest()
{
// Arrange
IList<Appointment> appointments = new List<Appointment>
{
new Appointment { ID = 1 },
new Appointment { ID = 2 }
};
IAppointmentRepository repository = new AppointmentRepository(appointments);
// Act
IList<Appointment> result = repository.GetAll().ToList();
// Assert
Assert.AreEqual(1, result[0].ID);
Assert.AreEqual(2, result[1].ID);
}