@Test
/** Test entire encoding */
public void testEncoding() throws UnknownHostException {
String expectedHeader = " 172.17.152.12253200 172.17.152.17 2016D 1";
String payload = "Hi Mom!";
String padding = " ";
String checksumStr = " 3352";
assertEquals("Header length", ReliableTransportMessage.HEADER_LEN, expectedHeader.length());
assertEquals("padding length", 23, padding.length());
InetAddress srcIP = InetAddress.getByName("172.17.152.122");
InetAddress destIP = InetAddress.getByName("172.17.152.17");
ReliableTransportMessage msg =
new ReliableTransportMessage(
srcIP, destIP, 53200, 2016, ReliableTransportMessage.DATA, 1, payload);
assertEquals("source IP", "/172.17.152.122", msg.getSourceIP().toString());
assertEquals("dest IP", "/172.17.152.17", msg.getDestIP().toString());
msg.encode();
String expectedEncoding = expectedHeader + payload + padding + checksumStr;
assertEquals("Expected Encoding length", 78, expectedEncoding.length());
assertEquals(
"Checksum input length",
73,
ReliableTransportMessage.HEADER_LEN + ReliableTransportMessage.PAYLOAD_LEN);
for (int i = 0; i < 73; i++)
// check i-th term of checksum
assertEquals("Checksum term " + i, (int) expectedEncoding.charAt(i), msg.getChecksumTerm(i));
String encodingStr = new String(msg.getBuffer());
assertEquals("encoded length", 78, encodingStr.length());
assertEquals("computed checksum", 3352, msg.getComputedChecksum());
assertEquals("encoding", expectedEncoding, encodingStr);
}
