//println("starting test now")

/*

import scala.concurrent._

import scala.concurrent.duration._

import ExecutionContext.Implicits.global

import scala.language.postfixOps 

val test_data = List(List(Some(71.539941), None), List(Some(76.974614), None), 

                     List(Some(65.226685), Some(6.35)), List(Some(78.354649), Some(12.241)), 

                     List(Some(85.517645), Some(38.188)))

val test_deltas = List(List(Some(0.07596697626574789), None), 

                       List(Some(-0.152620823795232), None), 

                       List(Some(0.20126676681483952), Some(0.9277165354330709)), 

                       List(Some(0.09141762603007778), Some(2.119679764725104)))

lazy val f = Future {

  assert((yearly_yield(test_deltas, 100, 0) - 107).abs <= 2)

  assert((yearly_yield(test_deltas, 100, 1) - 85).abs <= 2)

  assert((yearly_yield(test_deltas, 100, 2) - 156).abs <= 2)

  assert((yearly_yield(test_deltas, 100, 3) - 210).abs <= 2)

  assert((investment(List("IBM", "BIDU"), 2004 to 2008, 100) - 298).abs <= 10)

}

Await.result(f, 180 second)

*/

val urban_prices = List(List(Some(311.349976), Some(27.505054)), 

			List(Some(300.222351), Some(42.357094)), 

			List(Some(330.555054), Some(52.852215)))

assert(CW6c.yearly_yield(CW6c.get_deltas(urban_prices), 100, 0) == 125)