Refactor the object keys counter function

test/jquery.uls.test.js

@@ -272,4 +272,25 @@
 		assert.ok( !$.uls.data.deleteLanguage( 'qqr' ), 'Deleting language qqr, which was never added, returns false.' );
 	} );
 
+	test( '-- $.uls.utils testing', 4, function ( assert ) {
+		var languages, saveObjectKeys;
+
+		languages = {
+			mn: 'монгол',
+			sah: 'саха',
+			udm: 'удмурт'
+		};
+
+		assert.strictEqual( $.uls.utils.objectLength( {} ), 0 );
+		assert.strictEqual( $.uls.utils.objectLength( languages ), 3 );
+
+		// Simulate a browser without Object.keys
+		saveObjectKeys = Object.keys;
+		Object.keys = undefined;
+
+		assert.strictEqual( $.uls.utils.objectLength( {} ), 0 );
+		assert.strictEqual( $.uls.utils.objectLength( languages ), 3 );
+
+		Object.keys = saveObjectKeys;
+	} );
 }( jQuery ) );