public void ConvertToPersianDatePersianDigitTest()
{
Assert.AreEqual("۱۳۹۰/۶/۲۲", dateTimeHelper.ConvertToPersianDatePersianDigit(Convert.ToDateTime("2011/09/13")), "1");
Assert.AreEqual(string.Empty, dateTimeHelper.ConvertToPersianDatePersianDigit(null), "2");
Assert.AreEqual("۱۳۹۰/۱/۱", dateTimeHelper.ConvertToPersianDatePersianDigit(Convert.ToDateTime("2011/03/21")), "3");
Assert.AreEqual("۱۳۸۹/۱۲/۲۹", dateTimeHelper.ConvertToPersianDatePersianDigit(Convert.ToDateTime("2011/03/20")), "4");
Assert.AreEqual("۱۳۸۷/۱۲/۳۰", dateTimeHelper.ConvertToPersianDatePersianDigit(Convert.ToDateTime("2009/03/20")), "5");
Assert.AreEqual("۱۳۸۸/۱/۱", dateTimeHelper.ConvertToPersianDatePersianDigit(Convert.ToDateTime("2009/03/21")), "6");
}
