Test case details

Preparation Code

<script>   var object = {},       array = [],       i, test = 1001;     for (i = 0; i < 1000; i++) {    object['something' + i] = true;    array.push('something' + i);   } </script>

Test cases

Test #1

object.hasOwnProperty('something' + test)

Test #2

array.indexOf('something' + test) !== -1

Test #3

('something' + test) in object

Test #4

object['something' + test] === true