Added util.isAbstractMethod

lib/util.js

@@ -213,6 +213,21 @@ exports.createAbstractMethod = function( definition )
 }
 
 
+/**
+ * Determines if the given function is an abstract method
+ *
+ * @param  {Function}  function  function to inspect
+ *
+ * @return  {boolean}  true if function is an abstract method, otherwise false
+ */
+exports.isAbstractMethod = function( func )
+{
+    return ( ( func instanceof Function ) && ( func.abstractFlag === true ) )
+        ? true
+        : false
+    ;
+}
+
 
 /**
  * Overrides a method

test/test-class-abstract.js

@@ -25,8 +25,9 @@
 require( './common' );
 
 var assert         = require( 'assert' ),
-    Class          = require( 'class' ),
+    Class          = require( '../lib/class' ),
-    abstractMethod = require( 'class' ).abstractMethod;
+    abstractMethod = require( '../lib/class' ).abstractMethod,
+    util           = require( '../lib/util' );
 
 // not abstract
 var Foo = Class.extend( {} );
@@ -67,11 +68,18 @@ var ConcreteFoo = AbstractFoo.extend(
     },
 });
 
+
 assert.ok(
     ( abstractMethod() instanceof Function ),
     "abstractMethod() returns a function"
 );
 
+assert.ok(
+    ( util.isAbstractMethod( abstractMethod() ) ),
+    "Functions returned by abstractMethod() are considered to be abstract by " +
+        "util.isAbstractMethod"
+);
+
 assert.throws( function()
 {
     abstractMethod()();