/*def myassert(cond : => Boolean) = {
try {
assert(cond)
} catch {
case _ : Throwable => System.exit(1)
}
}
*/
assert(CW6b.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(CW6b.get_prices(List("GOOG", "AAPL"), 2010 to 2012) ==
List(List(Some(312.204773), Some(26.782711)),
List(Some(301.0466), Some(41.244694)),
List(Some(331.462585), Some(51.464207))))