Add debug output for callback invocations

Author: AVVS

index.js

@@ -1,6 +1,7 @@
 'use strict';
 
 var omit = require('lodash.omit');
+var debug = require('debug')('callback-queue');
 
 /**
  * Callback queue
@@ -83,9 +84,14 @@ exports.add = function (key, callback) {
      * stupid mistakes - you are more than welcome to fork and remove this restriction
      */
     return function queuedCallback() {
+        debug('calling callback for key %s', key);
+
         if (!bucket || callbackQueue[key] !== bucket || !isArray(bucket)) {
+            debug('Callbacks couldn\'t be invoked: ', bucket, callbackQueue[key] !== bucket);
             bucket = null;
             return;
+        } else {
+            debug('Invoked callback %s', key);
         }
 
         var len = arguments.length;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "callback-queue",
-  "version": "1.0.3",
+  "version": "1.0.4",
   "description": "Put your callbacks into queue to make sure that concurrent requests that you might want to perform will only be executed once",
   "main": "index.js",
   "scripts": {
@@ -22,6 +22,7 @@
   "author": "Vitaly Aminev <v@aminev.me>",
   "license": "MIT",
   "dependencies": {
+    "debug": "^2.1.3",
     "lodash.omit": "^3.1.0"
   },
   "devDependencies": {