public async Task UpsertCalculationDataFieldsRelationships()
        {
            string id = NewRandomString();

            string[] ids = Strings(NewRandomString(), NewRandomString());

            HttpStatusCode expectedStatusCode = HttpStatusCode.OK;

            GivenTheStatusCode($"calculation/{id}/relationships/datafields",
                               expectedStatusCode,
                               HttpMethod.Post);

            HttpStatusCode apiResponse = await _client.UpsertCalculationDataFieldsRelationships(id, ids);

            apiResponse
            .Should()
            .Be(expectedStatusCode);

            AndTheRequestContentsShouldHaveBeen(ids.AsJson());
        }