Added basic tests for gelf appender

test/gelfAppender.js

@@ -0,0 +1,31 @@
+var vows = require('vows')
+, log4js = require('../lib/log4js')
+, assert = require('assert')
+, util = require('util')
+, dgram = require("dgram");
+
+log4js.configure({ "appenders": [{"type": "gelf"}] }, undefined);
+
+vows.describe('log4js gelfAppender').addBatch({
+
+    'with default gelfAppender settings': {
+        topic: function() {
+            var logger = log4js.getLogger();
+
+            //Start local dgram server to act as GELF server
+            var server = dgram.createSocket("udp4");
+            //Assert as soon as message arrives
+            server.on("message", this.callback);
+            //Send a fake message as soon as server is ready
+            server.on("listening", function () {
+              logger.info("This should be a packet of size 161 bytes at the server");
+            });
+
+            //Listen on default values
+            server.bind(12201, 'localhost');
+        },
+        'should receive log messages at the local gelf server': function(err, packet) {
+            assert.ok(packet.size > 0, "Recevied blank message");
+        }
+    }
+}).export(module);