How to use

InAdvanceBillingMode

in

com.ning.billing.invoice.model

private BillingMode instantiateBillingMode(final BillingModeType billingMode) {
  switch (billingMode) {
    case IN_ADVANCE:
      return new InAdvanceBillingMode();
    default:
      throw new UnsupportedOperationException();
  }
}

  private void verifyInvoiceItems(final LocalDate startDate, final LocalDate endDate, final LocalDate targetDate,
                  final DateTimeZone dateTimeZone, final int billingCycleDayLocal, final BillingPeriod billingPeriod,
                  final LinkedHashMap<LocalDate, LocalDate> expectedDates) throws InvalidDateSequenceException {
    final InAdvanceBillingMode billingMode = new InAdvanceBillingMode();

    final List<RecurringInvoiceItemData> invoiceItems = billingMode.calculateInvoiceItemData(startDate, endDate, targetDate, billingCycleDayLocal, billingPeriod);

    int i = 0;
    for (final LocalDate periodStartDate : expectedDates.keySet()) {
      Assert.assertEquals(invoiceItems.get(i).getStartDate(), periodStartDate);
      Assert.assertEquals(invoiceItems.get(i).getEndDate(), expectedDates.get(periodStartDate));
      Assert.assertTrue(invoiceItems.get(0).getNumberOfCycles().compareTo(BigDecimal.ONE) <= 0);
      i++;
    }
    Assert.assertEquals(invoiceItems.size(), i);
  }
}

  @Override
  protected BillingMode getBillingMode() {
    return new InAdvanceBillingMode();
  }
}

@Override
protected BillingMode getBillingMode() {
  return new InAdvanceBillingMode();
}