From d2a6528fb3537f2025eccb5869970e8f1d01e7f2 Mon Sep 17 00:00:00 2001
From: Kagami Hiiragi <kagami@genshiken.org>
Date: Sun, 1 Feb 2015 18:15:34 +0300
Subject: [PATCH] Empty payload by default with message.encode

---
 lib/structs.js | 3 +++
 test.js        | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/lib/structs.js b/lib/structs.js
index a743745..807c975 100644
--- a/lib/structs.js
+++ b/lib/structs.js
@@ -86,6 +86,9 @@ var message = exports.message = {
   encode: function(command, payload) {
     assert(command.length <= 12, "Command is too long");
     assert(isAscii(command), "Non-ASCII characters in command");
+    if (!payload) {
+      payload = new Buffer(0);
+    }
     var buf = new Buffer(24 + payload.length);
     buf.fill(0);
     buf.writeUInt32BE(message.MAGIC, 0, true);
diff --git a/test.js b/test.js
index d635ba1..fb5bb5c 100644
--- a/test.js
+++ b/test.js
@@ -138,6 +138,12 @@ describe("Common structures", function() {
     it("should encode", function() {
       expect(message.encode("test", Buffer("payload")).toString("hex")).to.equal("e9beb4d97465737400000000000000000000000770b33ce97061796c6f6164");
     });
+
+    it("should encode empty payload without second argument", function() {
+      var res = message.decode(message.encode("ping"));
+      expect(res.command).to.equal("ping");
+      expect(res.payload.toString("hex")).to.equal("");
+    });
   });
 
   describe("object", function() {