value_of(arr).should_have(4, 'items'); 
	map: function(){		var arr = [1, 2, 3, 0];		arr = arr.map(function(item){			return (item + 1);		});		value_of(arr).should_be([2,3,4,1]);	},
9494	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/9494/1df74374a0f0b6727279f66d73d68b2ad06800b1/Array.js/buggy/Spec/Native/Array.js