net,dgram: return this from ref and unref methods

Modifies the following methods to return the instance instead
of undefined, to allow for chaining these methods:

- net.Server.ref
- net.Server.unref
- net.Socket.ref
- net.Socket.unref
- dgram.Socket.ref
- dgram.Socket.unref

PR-URL: https://github.com/nodejs/io.js/pull/1768
Reviewed-By: Evan Lucas <evanlucas@me.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/test/parallel/test-ref-unref-return.js b/test/parallel/test-ref-unref-return.js
new file mode 100644
index 0000000000..a82a433ab1
--- /dev/null
+++ b/test/parallel/test-ref-unref-return.js
@@ -0,0 +1,12 @@
+'use strict';
+var assert = require('assert');
+var net = require('net');
+var dgram = require('dgram');
+var common = require('../common');
+
+assert.ok((new net.Server()).ref() instanceof net.Server);
+assert.ok((new net.Server()).unref() instanceof net.Server);
+assert.ok((new net.Socket()).ref() instanceof net.Socket);
+assert.ok((new net.Socket()).unref() instanceof net.Socket);
+assert.ok((new dgram.Socket('udp4')).ref() instanceof dgram.Socket);
+assert.ok((new dgram.Socket('udp6')).unref() instanceof dgram.Socket);