public void OpenAddEventViewTest()
        {
            var absenceModel = new Mock<AbsenceModel>();
            absenceModel.Setup(m => m.GetAbsences(It.IsAny<int>(), It.IsAny<int>())).Returns(It.IsAny<List<Event>>);

            var controller = new HomeController(absenceModel.Object);
            var result = controller.OnOpenAddEvent(DateTime.Today.Year, DateTime.Today.Month, DateTime.Today.Day);

            Assert.IsInstanceOfType(result, typeof(PartialViewResult));
            Assert.AreEqual("OnOpenAddEditEvent", (result as PartialViewResult).ViewName);
            Assert.AreEqual("Add new event for " + DateTime.Today.ToString("dd MMMM yyyy"), (result as PartialViewResult).ViewBag.Title);
        }