public void testChat() {
    String message = MessageSS.chat(new Ipv4("0.0.0.0"), 1, 0, "message");

    assertNotNull(message);
    assertNull(MessageSS.chat(null, 1, 0, "message"));
    assertNull(MessageSS.chat(null, -1, 0, "message"));
    assertNull(MessageSS.chat(new Ipv4("0.0.0.0"), null, 0, "message"));
    assertNull(MessageSS.chat(new Ipv4("0.0.0.0"), 1, 0, null));

    assertNull(Message.getParam(message, 0));
    assertTrue(Message.getParam(message, MessageSS.SS_CHAT_MESSAGE).equals("message"));
    assertNull(Message.getParam(message, MessageSS.SS_CHAT_MESSAGE + 1));
  }