public async Task VisitsController_GetUserCount_Test() { bool called = false; var visitRepository = new Data.Repositories.Fakes.StubIVisitRepository(); var employeeRepository = new Data.Repositories.Fakes.StubIEmployeeRepository(); visitRepository.GetUserCountAsyncStringString = (user, filter) => { called = true; return(Task.FromResult(10)); }; var target = new VisitsController(visitRepository, new SecurityHelper(), employeeRepository); var result = await target.GetUserCount(string.Empty, DateTime.UtcNow); Assert.IsNotNull(result); Assert.IsTrue(called); }