public async Task UpsertCalculationSpecificationRelationship()
        {
            string idOne = NewRandomString();
            string idTwo = NewRandomString();

            await AssertPutRequest($"specification/{idTwo}/relationships/calculation/{idOne}",
                                   HttpStatusCode.OK,
                                   () => _client.UpsertCalculationSpecificationRelationship(idOne, idTwo));
        }