@Test
public void testGenerateScheduleInterestOnlyArrayBounds() {
AmortizationAttributes amAttrs = generateAmortizationAttributesObjectTemplate();
amAttrs.setLoanAmount(ofUSD(10000));
amAttrs.setInterestRateAsPercent(12.);
amAttrs.setInterestOnly(true);
amAttrs.setPaymentFrequency(TimePeriod.Weekly.getPeriodsPerYear());
int termInMonths = 24;
amAttrs.setTermInMonths(termInMonths);
amAttrs.setAdjustmentDate(LocalDate.of(2016, Month.JANUARY, 1));
List<ScheduledPayment> schedule = AmortizationCalculator.generateSchedule(amAttrs);
try {
schedule.get(-1);
fail("Interest only schedule should not allow negative payment number");
} catch (IndexOutOfBoundsException iobe) {
}
int expectedPayments =
(int) Math.ceil(amAttrs.getPaymentFrequency() * amAttrs.getTermInMonths() / 12.);
try {
schedule.get(expectedPayments);
fail("Interest only schedule should not allow payments beyond schedule bound");
} catch (IndexOutOfBoundsException iobe) {
}
schedule.get(expectedPayments - 1);
}
@Test
public void testGetPeriodicPaymentCompoundSemiPaymentWeekly() {
AmortizationAttributes amAttrs = generateAmortizationAttributesObjectTemplate();
amAttrs.setLoanAmount(USD50000.divide(5));
amAttrs.setInterestRateAsPercent(10.);
amAttrs.setCompoundingPeriodsPerYear(TimePeriod.SemiAnnually.getPeriodsPerYear());
amAttrs.setAmortizationPeriodInMonths(12);
amAttrs.setPaymentFrequency(TimePeriod.Weekly.getPeriodsPerYear());
MonetaryAmount result = AmortizationCalculator.getPeriodicPayment(amAttrs);
MonetaryAmount expectedResult = ofUSD(202.04);
assertEquals("Amortized, compounded semi-annual, payment weekly", expectedResult, result);
}
@Test
public void testPaymentDateWeekly() {
LocalDate scheduleStartDate = LocalDate.of(2015, Month.DECEMBER, 2);
AmortizationAttributes amAttrs = generateAmortizationAttributesObjectTemplate();
amAttrs.setAdjustmentDate(scheduleStartDate);
amAttrs.setPaymentFrequency(TimePeriod.Weekly.getPeriodsPerYear());
int termInMonths = 24;
amAttrs.setTermInMonths(termInMonths);
List<ScheduledPayment> schedule = AmortizationCalculator.generateSchedule(amAttrs);
for (int i = 1; i <= (52 * 2); i++) {
String msg = String.format("Date for weekly payment %d", i);
assertEquals(msg, scheduleStartDate.plusWeeks(i), schedule.get(i - 1).getPaymentDate());
}
}
