//-------------------------------------------------------------------------
public virtual void test_discountFactor()
{
ZeroRatePeriodicDiscountFactors test = ZeroRatePeriodicDiscountFactors.of(GBP, DATE_VAL, CURVE);
double relativeYearFraction = ACT_365F.relativeYearFraction(DATE_VAL, DATE_AFTER);
double expected = Math.Pow(1.0d + CURVE.yValue(relativeYearFraction) / CMP_PERIOD, -CMP_PERIOD * relativeYearFraction);
assertEquals(test.discountFactor(DATE_AFTER), expected);
}
public virtual void test_zeroRatePointSensitivity_sensitivityCurrency()
{
ZeroRatePeriodicDiscountFactors test = ZeroRatePeriodicDiscountFactors.of(GBP, DATE_VAL, CURVE);
double relativeYearFraction = ACT_365F.relativeYearFraction(DATE_VAL, DATE_AFTER);
double df = test.discountFactor(DATE_AFTER);
ZeroRateSensitivity expected = ZeroRateSensitivity.of(GBP, relativeYearFraction, USD, -df * relativeYearFraction);
assertEquals(test.zeroRatePointSensitivity(DATE_AFTER, USD), expected);
}
//-------------------------------------------------------------------------
public virtual void test_discountFactorWithSpread_continuous()
{
ZeroRatePeriodicDiscountFactors test = ZeroRatePeriodicDiscountFactors.of(GBP, DATE_VAL, CURVE);
double relativeYearFraction = ACT_365F.relativeYearFraction(DATE_VAL, DATE_AFTER);
double df = test.discountFactor(DATE_AFTER);
double expected = df * Math.Exp(-SPREAD * relativeYearFraction);
assertEquals(test.discountFactorWithSpread(DATE_AFTER, SPREAD, CONTINUOUS, 0), expected, TOLERANCE_DF);
}
//-------------------------------------------------------------------------
public virtual void test_zeroRate()
{
ZeroRatePeriodicDiscountFactors test = ZeroRatePeriodicDiscountFactors.of(GBP, DATE_VAL, CURVE);
double relativeYearFraction = ACT_365F.relativeYearFraction(DATE_VAL, DATE_AFTER);
double discountFactor = test.discountFactor(DATE_AFTER);
double zeroRate = test.zeroRate(DATE_AFTER);
assertEquals(Math.Exp(-zeroRate * relativeYearFraction), discountFactor);
}
public virtual void test_discountFactorWithSpread_periodic()
{
int periodPerYear = 4;
ZeroRatePeriodicDiscountFactors test = ZeroRatePeriodicDiscountFactors.of(GBP, DATE_VAL, CURVE);
double relativeYearFraction = ACT_365F.relativeYearFraction(DATE_VAL, DATE_AFTER);
double discountFactorBase = test.discountFactor(DATE_AFTER);
double onePlus = Math.Pow(discountFactorBase, -1.0d / (periodPerYear * relativeYearFraction));
double expected = Math.Pow(onePlus + SPREAD / periodPerYear, -periodPerYear * relativeYearFraction);
assertEquals(test.discountFactorWithSpread(DATE_AFTER, SPREAD, PERIODIC, periodPerYear), expected, TOLERANCE_DF);
}
public virtual void test_zeroRatePointSensitivityWithSpread_sensitivityCurrency_periodic()
{
int periodPerYear = 4;
ZeroRatePeriodicDiscountFactors test = ZeroRatePeriodicDiscountFactors.of(GBP, DATE_VAL, CURVE);
double relativeYearFraction = ACT_365F.relativeYearFraction(DATE_VAL, DATE_AFTER);
double df = test.discountFactor(DATE_AFTER);
double z = -1.0 / relativeYearFraction * Math.Log(df);
double shift = 1.0E-6;
double zP = z + shift;
double zM = z - shift;
double dfSP = Math.Pow(Math.Pow(Math.Exp(-zP * relativeYearFraction), -1.0 / (relativeYearFraction * periodPerYear)) + SPREAD / periodPerYear, -relativeYearFraction * periodPerYear);
double dfSM = Math.Pow(Math.Pow(Math.Exp(-zM * relativeYearFraction), -1.0 / (relativeYearFraction * periodPerYear)) + SPREAD / periodPerYear, -relativeYearFraction * periodPerYear);
double ddfSdz = (dfSP - dfSM) / (2 * shift);
ZeroRateSensitivity expected = ZeroRateSensitivity.of(GBP, relativeYearFraction, USD, ddfSdz);
ZeroRateSensitivity computed = test.zeroRatePointSensitivityWithSpread(DATE_AFTER, USD, SPREAD, PERIODIC, periodPerYear);
assertTrue(computed.compareKey(expected) == 0);
assertEquals(computed.Sensitivity, expected.Sensitivity, TOLERANCE_DELTA_FD);
}
