From 2f60e3093c038f463725d2026e31e6d6d3c67a2b Mon Sep 17 00:00:00 2001
From: Matteo Collina <hello@matteocollina.com>
Date: Tue, 19 Jan 2016 09:52:54 +0100
Subject: [PATCH] Throw if config does not validate and callback is missing.

Fixes https://github.com/mcollina/mosca/issues/259
---
 lib/server.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/server.js b/lib/server.js
index 380edda..1ed91c0 100755
--- a/lib/server.js
+++ b/lib/server.js
@@ -103,7 +103,11 @@ function Server(opts, callback) {
 
   if (validationResult.errors.length > 0) {
     var errMessage = validationResult.errors[0].message;
-    callback(new Error(errMessage));
+    if (callback) {
+      callback(new Error(errMessage));
+    } else {
+      throw new Error(errMessage);
+    }
   }
 
   modernOpts = options.populate(modernOpts);