michael@0: /*
michael@0:  * Any copyright is dedicated to the Public Domain.
michael@0:  * http://creativecommons.org/licenses/publicdomain/
michael@0:  */
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: var BUGNUMBER = 668024;
michael@0: var summary =
michael@0:   'Array.prototype.splice, when it deletes elements, should make sure any ' +
michael@0:   'deleted but not visited elements are suppressed from subsequent enumeration';
michael@0: 
michael@0: print(BUGNUMBER + ": " + summary);
michael@0: 
michael@0: /**************
michael@0:  * BEGIN TEST *
michael@0:  **************/
michael@0: 
michael@0: var arr = [0, 1, 2, 3, 4, 5, , 7];
michael@0: 
michael@0: var seen = [];
michael@0: var sawOneBeforeThree = true;
michael@0: for (var p in arr)
michael@0: {
michael@0:   if (p === "1")
michael@0:   {
michael@0:     // The order of enumeration of properties is unspecified, so technically,
michael@0:     // it would be kosher to enumerate "1" last, say, such that all properties
michael@0:     // in the array actually were enumerated, including an index which splice
michael@0:     // would delete.  Don't flag that case as a failure.  (SpiderMonkey doesn't
michael@0:     // do this, and neither do any of the other browser engines, but it is
michael@0:     // permissible behavior.)
michael@0:     if (seen.indexOf("3") >= 0)
michael@0:     {
michael@0:       sawOneBeforeThree = false;
michael@0:       break;
michael@0:     }
michael@0: 
michael@0:     arr.splice(2, 3);
michael@0:   }
michael@0: 
michael@0:   seen.push(p);
michael@0: }
michael@0: 
michael@0: if (sawOneBeforeThree)
michael@0: {
michael@0:   // ES5 12.6.4 states:
michael@0:   //
michael@0:   //   If a property that has not yet been visited during enumeration is
michael@0:   //   deleted, then it will not be visited.
michael@0:   //
michael@0:   // So if we haven't seen "3" by the time we see "1", the splice call above
michael@0:   // will delete "3", and therefore we must not see it.
michael@0:   assertEq(seen.indexOf("3"), -1);
michael@0: }
michael@0: 
michael@0: /******************************************************************************/
michael@0: 
michael@0: if (typeof reportCompare === "function")
michael@0:   reportCompare(true, true);
michael@0: 
michael@0: print("Tests complete");