add test for app_socket; seems to work
diff --git a/test/test_app_socket.cc b/test/test_app_socket.cc
new file mode 100644
index 0000000..e30ae69
--- /dev/null
+++ b/test/test_app_socket.cc
@@ -0,0 +1,108 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2012 University of California, Los Angeles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Zhenkai Zhu <zhenkai@cs.ucla.edu>
+ *         卞超轶 Chaoyi Bian <bcy@pku.edu.cn>
+ *	   Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#include <boost/test/unit_test.hpp>
+#include <boost/test/output_test_stream.hpp> 
+using boost::test_tools::output_test_stream;
+
+#include <boost/make_shared.hpp>
+
+#include "../model/sync-app-socket.h"
+extern "C" {
+#include <unistd.h>
+}
+
+using namespace Sync;
+using namespace std;
+using namespace boost;
+
+class TestStructApp {
+public:
+  map<string, string> data;
+  void set(string str1, string str2) {
+    data.insert(make_pair(str1, str2));
+  }
+
+  string toString(){
+    map<string, string>::iterator it = data.begin(); 
+    string str = "";
+    for (; it != data.end(); ++it){
+      str += "<";
+      str += it->first;
+      str += "|";
+      str += it->second;
+      str += ">";
+    }
+    return str;
+  }
+
+};
+
+BOOST_AUTO_TEST_CASE (AppSocketTest)
+{
+
+	TestStructApp a1, a2, a3;
+	boost::function<void(string, string)> f1 = bind(&TestStructApp::set, &a1, _1,
+	_2);
+	boost::function<void(string, string)> f2 = bind(&TestStructApp::set, &a2, _1,
+	_2);
+	boost::function<void(string, string)> f3 = bind(&TestStructApp::set, &a3, _1,
+	_2);
+	
+	string p1("/irl.cs.ucla.edu"), p2("/yakshi.org"), p3("/google.com");
+
+	SyncAppSocket s1(p1, f1), s2(p2, f2), s3(p3, f3);
+	BOOST_CHECK_EQUAL(a1.toString(), a2.toString());
+	BOOST_CHECK_EQUAL(a2.toString(), a3.toString());
+
+	// single source
+	s1.publish(p1, 0, "Very funny Scotty, now beam down my clothes", 10); 
+	usleep(10000);
+	BOOST_CHECK_EQUAL(a1.toString(), a2.toString());
+	BOOST_CHECK_EQUAL(a2.toString(), a3.toString());
+
+	// single source, multiple data at once
+	s1.publish(p1, 0, "Yes, give me that ketchup", 10); 
+	s1.publish(p1, 0, "Don't look conspicuous, it draws fire", 10); 
+	usleep(10000);
+	BOOST_CHECK_EQUAL(a1.toString(), a2.toString());
+	BOOST_CHECK_EQUAL(a2.toString(), a3.toString());
+
+	// another single source
+	s3.publish(p3, 0, "You surf the Internet, I surf the real world", 10); 
+	usleep(10000);
+	// another single source, multiple data at once
+	s2.publish(p2, 0, "I got a fortune cookie once that said 'You like Chinese food'", 10); 
+	s2.publish(p2, 0, "Real men wear pink. Why? Because their wives make them", 10);
+	usleep(10000);
+	BOOST_CHECK_EQUAL(a1.toString(), a2.toString());
+	BOOST_CHECK_EQUAL(a2.toString(), a3.toString());
+
+	// not sure weither this is simultanous data generation from multiple sources
+	s1.publish(p1, 0, "Shakespeare says: 'Prose before hos.'", 10); 
+	s2.publish(p2, 0, "Pick good people, talent never wears out", 10); 
+	usleep(10000);
+	BOOST_CHECK_EQUAL(a1.toString(), a2.toString());
+	BOOST_CHECK_EQUAL(a2.toString(), a3.toString());
+}
+
+