public void EomonthShouldReturnCorrectResultWithPositiveArg()
        {
            var func = new Eomonth();
            var arg = new DateTime(2013, 2, 2).ToOADate();

            var result = func.Execute(FunctionsHelper.CreateArgs(arg, 3), _parsingContext);

            Assert.AreEqual(41425d, result.Result);
        }