public async Task TestGetProgramsHierarchyAsync() { var response = await controller.GetProgramsHierarchyAsync(new PagingQueryBindingModel <OrganizationProgramDTO>()); Assert.IsInstanceOfType(response, typeof(OkNegotiatedContentResult <PagedQueryResults <OrganizationProgramDTO> >)); service.Verify(x => x.GetProgramsHierarchyAsync(It.IsAny <QueryableOperator <OrganizationProgramDTO> >()), Times.Once()); }