Added deep cloning for objects

lib/util.js

@@ -145,7 +145,10 @@ exports.clone = function clone( data, deep )
         {
             if ( hasOwn.call( data, prop ) )
             {
-                newobj[ prop ] = data[ prop ];
+                newobj[ prop ] = ( deep )
+                    ? clone( data[ prop ] )
+                    : data[ prop ]
+                ;
             }
         }
 

test/test-util-clone.js

@@ -66,7 +66,10 @@ for ( prop in obj )
 //
 // deep clone
 var deep_arr = [ [ 1, 2 ], [ 3, 4 ], [ 5, [ 6, 7 ] ], { a: 1 } ],
+    deep_obj = { a: [ 1 ], b: [ 2 ], c: { d: 3 } },
+
     deep_arr2 = util.clone( deep_arr, true ),
+    deep_obj2 = util.clone( deep_obj, true ),
 
     deep_i = 0;
 
@@ -77,6 +80,12 @@ assert.deepEqual(
     "Deep cloned values are equal"
 );
 
+assert.deepEqual(
+    deep_obj2,
+    deep_obj,
+    "Deep cloned values are equal"
+);
+
 deep_i = deep_arr.length;
 while ( deep_i-- )
 {
@@ -86,3 +95,11 @@ while ( deep_i-- )
     );
 }
 
+for ( prop in deep_obj )
+{
+    assert.ok(
+        ( deep_obj2[ prop ] !== deep_obj[ prop ] ),
+        "Deep cloned object's values are cloned (" + prop + ")"
+    );
+}
+