1 assert(get_prices(List("GOOG", "AAPL"), 2010 to 2012) ==

     1 def myassert(cond : => Boolean) = {

     2     List(List(Some(311.349976), Some(20.544939)), 

     2   try {

     3          List(Some(300.222351), Some(31.638695)), 

     3     assert(cond)

     4          List(Some(330.555054), Some(39.478039))))

     4   } catch { 

     5     case _ : Throwable => System.exit(1)

     6   }

     7 }

     8 

     9 myassert(get_prices(List("BIDU"), 2004 to 2008) ==

    10    List(List(None), List(None), List(Some(6.35)), 

    11         List(Some(12.241)), List(Some(38.188))))

    12 

    13 

    14 myassert(get_prices(List("GOOG", "AAPL"), 2010 to 2012) ==

    15    List(List(Some(312.204773), Some(26.782711)), 

    16         List(Some(301.0466), Some(41.244694)), 

    17         List(Some(331.462585), Some(51.464207))))