public void Queue() { var tempData = new Mock <ITempDataDictionaryFactory>(); tempData.Setup(x => x.GetTempData(It.IsAny <HttpContext>())).Returns(_tempDataMock.Object); var contextAccessor = new Mock <IHttpContextAccessor>(); var flashMessage = new Vereyon.Web.FlashMessage(tempData.Object, contextAccessor.Object); flashMessage.Info("Test"); }