@Test
public void testNegativeNumber1() throws IOException {

    final ByteArrayOutputStream baos = new ByteArrayOutputStream();
    final AJsonSerHelper ser = new AJsonSerHelper(baos);
    ser.writeNumberLiteral(-1234567890, 1);
    final String result = new String(baos.toByteArray(), "utf-8");
    assertEquals("-123456789.0", result);
}