public async Task ThenRoEpaoApprovedFlagIsSet() { var mediator = new Mock <IMediator>(); mediator.Setup(m => m.Send(It.IsAny <UpdateRoEpaoApprovedFlagRequest>(), It.IsAny <CancellationToken>())).ReturnsAsync(new Organisation { Id = Guid.NewGuid(), }); var organisationController = new OrganisationController(mediator.Object, new Mock <ILogger <OrganisationController> >().Object); await organisationController.UpdateRoEpaoApprovedFlag(Guid.NewGuid(), Guid.NewGuid(), It.IsAny <string>(), true); mediator.VerifyAll(); }