public void Should_ChangeHasAlternativeOffer()
        {
            var tenderChangeRequest = new TenderChangeRequest();

            tenderChangeRequest.ChangeHasAlternativeOffer(true);
            tenderChangeRequest.HasAlternativeOffer.ShouldBe(true);
            tenderChangeRequest.State.ShouldBe(SharedKernal.ObjectState.Modified);
        }