public virtual void test_discountFactors_notKnown() { ImmutableRatesProvider test = ImmutableRatesProvider.builder(VAL_DATE).build(); assertThrowsIllegalArg(() => test.discountFactors(GBP)); assertThrowsIllegalArg(() => test.discountFactor(GBP, LocalDate.of(2014, 7, 30))); }