Add basic test for each of udp and tcp server module

test/server_tests.js

@@ -0,0 +1,42 @@
+var dgram = require('dgram'),
+    net = require('net');
+
+var config = {
+    address: '127.0.0.1',
+    port: 8125
+};
+var msg = "This is a test\r\n";
+
+module.exports = {
+  udp_data_received: function(test) {
+    test.expect(3);
+    var server = require('../servers/udp');
+    var started = server.start(config, function(data, rinfo) {
+        test.equal(msg, data.toString());
+        test.equal(msg.length, rinfo.size);
+        test.done();
+    });
+    test.ok(started);
+
+    var buf = new Buffer(msg);
+    var sock = dgram.createSocket('udp4');
+    sock.send(buf, 0, buf.length, config.port, config.address, function(err, bytes) {
+          sock.close();
+    });
+  },
+  tcp_data_received: function(test) {
+    test.expect(3);
+    var server = require('../servers/tcp');
+    var started = server.start(config, function(data, rinfo) {
+        test.equal(msg, data.toString());
+        test.equal(msg.length, rinfo.size);
+        test.done();
+    });
+    test.ok(started);
+
+    var client = net.connect(config.port, config.address, function() {
+        client.write(msg);
+        client.end();
+    });
+  }
+}