How to use

DefaultBillingStateFormatter

in

com.ning.billing.overdue.applicator.formatters

  @Override
  public BillingStateFormatter createBillingStateFormatter(final BillingState billingState) {
    return new DefaultBillingStateFormatter(billingState);
  }
}

  @Test(groups = "fast")
  public void testBalanceFormatting() throws Exception {
    final BillingState billingState = new BillingState(UUID.randomUUID(), 2, BigDecimal.TEN,
                              new LocalDate(), DateTimeZone.UTC, UUID.randomUUID(),
                              null, null);
    final DefaultBillingStateFormatter formatter = new DefaultBillingStateFormatter(billingState);
    Assert.assertEquals(formatter.getFormattedBalanceOfUnpaidInvoices(), "10.00");
  }
}

  @Override
  public String getFormattedBalanceOfUnpaidInvoices() {
    return round(Objects.firstNonNull(getBalanceOfUnpaidInvoices(), BigDecimal.ZERO)).toString();
  }
}