The Tor Browser / file revision

 /*

  * Any copyright is dedicated to the Public Domain.

  * http://creativecommons.org/licenses/publicdomain/

  */

 var BUGNUMBER = 612838;

 var summary = "String.prototype.indexOf with empty searchString";

 print(BUGNUMBER + ": " + summary);

 assertEq("123".indexOf("", -1), 0);

 assertEq("123".indexOf("", 0), 0);

 assertEq("123".indexOf("", 1), 1);

 assertEq("123".indexOf("", 3), 3);

 assertEq("123".indexOf("", 4), 3);

 assertEq("123".indexOf("", 12345), 3);

 reportCompare(true, true);

 print("All tests passed!");