public void NowFunctionShouldReturnNow()
{
var startTime = DateTime.Now;
Thread.Sleep(1);
var func = new Now();
var args = new FunctionArgument[0];
var result = func.Execute(args, _parsingContext);
Thread.Sleep(1);
var endTime = DateTime.Now;
var resultDate = DateTime.FromOADate((double)result.Result);
Assert.IsTrue(resultDate > startTime && resultDate < endTime);
}