public async Task VisitsController_GetContFromDate_Test() { bool called = false; var visitRepository = new Data.Repositories.Fakes.StubIVisitRepository(); var employeeRepository = new Data.Repositories.Fakes.StubIEmployeeRepository(); visitRepository.GetCountFromDateAsyncStringDateTime = (filter, datetime) => { Assert.IsNotNull(datetime); called = true; return(Task.FromResult(20)); }; var target = new VisitsController(visitRepository, new SecurityHelper(), employeeRepository); var result = await target.GetCountFromDate(string.Empty, DateTime.Today); Assert.IsNotNull(result); Assert.IsTrue(called); }