### Question:
CSChannel extends BaseChannel { protected void sendMessageHeader(ISOMsg m, int len) { } CSChannel();  CSChannel(String host, int port, ISOPackager p);  CSChannel(ISOPackager p);  CSChannel(ISOPackager p, ServerSocket serverSocket); @Override void setConfiguration(Configuration cfg);  }### Answer:
@Test public void testSendMessageHeader() throws Throwable { CSChannel cSChannel = new CSChannel(); cSChannel.sendMessageHeader(new ISOMsg(), 100); assertEquals(0, cSChannel.getHeaderLength(), "cSChannel.getHeaderLength()"); }