@Test
public void testNumberWithFrac9() throws IOException {

    final ByteArrayOutputStream baos = new ByteArrayOutputStream();
    final AJsonSerHelper ser = new AJsonSerHelper(baos);
    ser.writeNumberLiteral(1234567890, 9);
    final String result = new String(baos.toByteArray(), "utf-8");
    assertEquals("1.234567890", result);
}