Removed Interface.abstractMethod() in favor of 'abstract' keyword

lib/interface.js

@@ -36,9 +36,6 @@ exports.extend = function()
 }
 
 
-exports.abstractMethod = util.createAbstractMethod;
-
-
 /**
  * Default interface implementation
  *
@@ -50,13 +47,24 @@ function Interface() {}
 function extend()
 {
     var args      = Array.prototype.slice.call( arguments ),
-        props     = prop_check( args.pop() ) || {},
+        props     = args.pop() || {},
         base      = args.pop() || Interface,
         prototype = new base();
 
     var new_interface = function() {};
 
-    util.propCopy( props, prototype );
+    util.propCopy( props, prototype, {
+        each: function( name, value )
+        {
+            if ( util.isAbstractMethod( value ) === false )
+            {
+                throw TypeError(
+                    "Only abstract methods are permitted within Interface " +
+                        "definitons"
+                );
+            }
+        },
+    } );
 
     attach_extend( new_interface );
     new_interface.prototype   = prototype;
@@ -69,29 +77,6 @@ function extend()
 }
 
 
-/**
- * Checks to ensure that only methods are being declared
- *
- * @param  {Object}  props  interface definition
- *
- * @return  {Object}  the same properties that were passed to the function
- */
-function prop_check( props )
-{
-    for ( prop in props )
-    {
-        if ( util.isAbstractMethod( props[ prop ] ) === false )
-        {
-            throw new Error(
-                "Only abstract methods are permitted within Interface definitons"
-            );
-        }
-    }
-
-    return props;
-}
-
-
 /**
  * Attaches extend method to the given function (interface)
  *

test/test-interface-extend.js

@@ -22,10 +22,9 @@
  * @package test
  */
 
-var common         = require( './common' ),
+var common    = require( './common' ),
-    assert         = require( 'assert' ),
+    assert    = require( 'assert' ),
-    Interface      = common.require( 'interface' ),
+    Interface = common.require( 'interface' );
-    abstractMethod = Interface.abstractMethod;
 
 
 assert.throws( function()
@@ -35,7 +34,7 @@ assert.throws( function()
         // properties (non-methods) are not permitted
         prop: 'not permitted',
     });
-}, Error, "Properties are not permitted within Interface definitions" );
+}, TypeError, "Properties are not permitted within Interface definitions" );
 
 assert.throws( function()
 {
@@ -44,24 +43,24 @@ assert.throws( function()
         // concrete method
         method: function() {}
     });
-}, Error, "Concrete methods are not permitted within Interface definitions" );
+}, TypeError, "Concrete methods are not permitted within Interface definitions" );
 
 assert.doesNotThrow(
     function()
     {
         Interface.extend(
         {
-            method: abstractMethod(),
+            'abstract method': [],
         });
     },
-    Error,
+    TypeError,
     "Abstract method declarations are allowed within Interface definitions"
 );
 
 
 var BaseType = Interface.extend(
 {
-    method: abstractMethod(),
+    'abstract method': [],
 });
 
 assert.ok(
@@ -72,7 +71,7 @@ assert.ok(
 
 var SubType = Interface.extend( BaseType,
 {
-    second: abstractMethod(),
+    'abstract second': [],
 });
 
 assert.ok(
@@ -99,7 +98,7 @@ assert.ok(
 
 var SubType2 = BaseType.extend(
 {
-    second: abstractMethod(),
+    'abstract second': [],
 });
 
 assert.ok(