public void Reset()
{
PhoneOrderEntity orderInstance;
var factory = new PhoneOrderEntityFactory();
Guid emptyGuid = Guid.Parse("00000000-0000-0000-0000-000000000000");
DateTime emptyTime = DateTime.FromBinary(0);
factory.SetName("a", "b");
factory.SetPhoneNumber("5555");
factory.SetStreet("444 street");
factory.SetCity("some city");
factory.SetZipcode(12345);
factory.GenerateId();
factory.GeneratePlacedOnDate();
factory.SetStatus(PhoneOrderEntity.ApprovalStatus.Open);
factory.Reset();
orderInstance = factory.GetInstance();
Assert.Null(orderInstance.FirstName);
Assert.Null(orderInstance.LastName);
Assert.Null(orderInstance.Phone);
Assert.Null(orderInstance.Street);
Assert.Null(orderInstance.City);
Assert.AreEqual(0, orderInstance.Zipcode);
Assert.NotNull(orderInstance.Id);
Assert.AreEqual(emptyGuid, orderInstance.Id);
Assert.NotNull(orderInstance.PlacedOn);
Assert.AreEqual(emptyTime, orderInstance.PlacedOn);
Assert.AreEqual(PhoneOrderEntity.ApprovalStatus.PendingApproval, orderInstance.Status);
}