assert(get_january_data("GOOG", 1980) == List())

assert(get_january_data("GOOG", 2010).head == "2010-01-04,311.349976")




/*
assert(CW6c.get_prices(List("BIDU"), 2004 to 2008) == 
       List(List(None), List(None), 
            List(Some(6.35)), List(Some(12.241)), 
            List(Some(38.188))))


assert(CW6c.get_prices(List("GOOG", "AAPL"), 2010 to 2012) ==
       List(List(Some(311.349976), Some(27.505054)), 
            List(Some(300.222351), Some(42.357094)), 
            List(Some(330.555054), Some(52.852215))))
*/