diff --git a/src/test/java/com/github/nkzawa/socketio/parser/ParserTest.java b/src/test/java/com/github/nkzawa/socketio/parser/ParserTest.java
new file mode 100644
index 0000000..a8f2762
--- /dev/null
+++ b/src/test/java/com/github/nkzawa/socketio/parser/ParserTest.java
@@ -0,0 +1,55 @@
+package com.github.nkzawa.socketio.parser;
+
+import com.google.gson.JsonParser;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import static com.github.nkzawa.socketio.parser.Parser.decode;
+import static com.github.nkzawa.socketio.parser.Parser.encode;
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+
+@RunWith(JUnit4.class)
+public class ParserTest {
+
+    @Test
+    public void connect() {
+        Packet packet = new Packet(Parser.CONNECT);
+        packet.nsp = "/woot";
+        test(packet);
+    }
+
+    public void disconnect() {
+        Packet packet = new Packet(Parser.DISCONNECT);
+        packet.nsp = "/woot";
+        test(packet);
+    }
+
+    public void event() {
+        Packet packet1 = new Packet(Parser.EVENT);
+        packet1.data = new JsonParser().parse("[\"a\", 1, {}]");
+        packet1.nsp = "/";
+        test(packet1);
+
+        Packet packet2 = new Packet(Parser.EVENT);
+        packet2.data = new JsonParser().parse("[\"a\", 1, {}]");
+        packet2.nsp = "/test";
+        test(packet2);
+    }
+
+    public void ack() {
+        Packet packet = new Packet(Parser.ACK);
+        packet.data = new JsonParser().parse("[\"a\", 1, {}]");
+        packet.id = 123;
+        packet.nsp = "/";
+        test(packet);
+    }
+
+    private void test(Packet packet) {
+        Packet _packet = decode(encode(packet));
+        assertThat(_packet.type, is(packet.type));
+        assertThat(_packet.data, is(packet.data));
+        assertThat(_packet.nsp, is(packet.nsp));
+    }
+}