public void GetAllRelationEndPointIDs()
        {
            var endPointIDs = RelationEndPointID.GetAllRelationEndPointIDs(DomainObjectIDs.Order1);

            var expectedIDs = new[]
            {
                RelationEndPointObjectMother.CreateRelationEndPointID(DomainObjectIDs.Order1, "Customer"),
                RelationEndPointObjectMother.CreateRelationEndPointID(DomainObjectIDs.Order1, "OrderTicket"),
                RelationEndPointObjectMother.CreateRelationEndPointID(DomainObjectIDs.Order1, "OrderItems"),
                RelationEndPointObjectMother.CreateRelationEndPointID(DomainObjectIDs.Order1, "Official"),
            };

            Assert.That(endPointIDs, Is.EquivalentTo(expectedIDs));
        }