/** Test text padding */
 public void testTextPadding() {
   String payload = "Your mama wears cowboy boots";
   assertEquals("payload length", 28, payload.length());
   char[] encoding = ReliableTransportMessage.rightPaddedString(payload);
   for (int i = 0; i < 28; i++)
     // check i-th char
     assertEquals("char " + i, payload.charAt(i), encoding[i]);
   assertEquals("char 28", ' ', encoding[28]);
   assertEquals("char 29", ' ', encoding[29]);
 }