public async Task About() { var providerCode = "PROVIDERCODE"; var frontendUrlMock = new Mock <IFrontendUrlService>(); frontendUrlMock.Setup(x => x.ShouldRedirectOrganisationShow()).Returns(true); frontendUrlMock.Setup(x => x.RedirectToFrontend("/organisations/" + $"{providerCode}/2019/about")).Returns(new RedirectResult("frontend")); var controller = new OrganisationController(null, frontendUrlMock.Object); var result = await controller.About(providerCode); Assert.IsTrue(result is RedirectResult); }