public void TestSearch()
{
SiteSqlDAO dao = new SiteSqlDAO(connectionString);
DateTime fromDate = Convert.ToDateTime("06/18/2020");
DateTime toDate = Convert.ToDateTime("06/19/2020");
IList <Site> list = dao.SearchSitesByDate(campground_id, fromDate, toDate);
Assert.AreEqual(1, list.Count);
}