public async Task Index_UpdateOrganisationPostAddsOrganisationAndReturnsRedirect()
        {
            var organisationName = "org1";
            var tradingName      = "trading1";

            var result = await _controller.UpdateOrganisation(new OrganisationViewModel { OrganisationName = organisationName, TradingName = tradingName });

            await _partyRespository.Received().AddOrganisation(Arg.Is <Organisation>(o => o.OrganisationName == organisationName && o.TradingName == tradingName));

            Assert.IsTrue(result is RedirectToActionResult);
        }