michael@0: // Any copyright is dedicated to the Public Domain.
michael@0: // http://creativecommons.org/licenses/publicdomain/
michael@0: 
michael@0: var gTestfile = 'parse-reviver-array-delete.js';
michael@0: //-----------------------------------------------------------------------------
michael@0: var BUGNUMBER = 999999;
michael@0: var summary = "JSON.parse with a reviver which elides array elements";
michael@0: 
michael@0: print(BUGNUMBER + ": " + summary);
michael@0: 
michael@0: /**************
michael@0:  * BEGIN TEST *
michael@0:  **************/
michael@0: 
michael@0: /*
michael@0:  * The reviver deletes all properties from the to-be-returned array.  Thus
michael@0:  * stringification reveals properties on the prototype chain -- but there are
michael@0:  * none, so this result is unsurprising.
michael@0:  */
michael@0: assertEq(JSON.parse('[1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0]',
michael@0:                     function revive(k, v)
michael@0:                     {
michael@0:                       if (k === "")
michael@0:                         return v;
michael@0:                       return undefined;
michael@0:                     }) + "",
michael@0:          ",,,,,,,,,,,,,,,,,,,");
michael@0: 
michael@0: /*
michael@0:  * Now let's try a reviver that deletes every property but a mega-huge one.
michael@0:  */
michael@0: var str = "[";
michael@0: var expected = "";
michael@0: var expected2 = "";
michael@0: for (var i = 0; i < 2048; i++)
michael@0: {
michael@0:   str += "1,";
michael@0:   if (i === 2047)
michael@0:   {
michael@0:     expected += "1";
michael@0:     expected2 += "1";
michael@0:   }
michael@0:   if (i === 3)
michael@0:     expected2 += "17";
michael@0:   expected += ",";
michael@0:   expected2 += ",";
michael@0: }
michael@0: str += "1]";
michael@0: 
michael@0: assertEq(JSON.parse(str,
michael@0:                     function reviver(k, v)
michael@0:                     {
michael@0:                       if (k === "" || k === "2047")
michael@0:                         return v;
michael@0:                       return undefined;
michael@0:                     }) + "",
michael@0:          expected);
michael@0: 
michael@0: 
michael@0: Array.prototype[3] = 17;
michael@0: 
michael@0: /* Now, with a property on the prototype chain, it'll show through. */
michael@0: assertEq(JSON.parse('[1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0]',
michael@0:                     function revive(k, v)
michael@0:                     {
michael@0:                       if (k === "")
michael@0:                         return v;
michael@0:                       return undefined;
michael@0:                     }) + "",
michael@0:          ",,,17,,,,,,,,,,,,,,,,");
michael@0: 
michael@0: 
michael@0: /* And here too. */
michael@0: assertEq(JSON.parse(str,
michael@0:                     function reviver(k, v)
michael@0:                     {
michael@0:                       if (k === "" || k === "2047")
michael@0:                         return v;
michael@0:                       return undefined;
michael@0:                     }) + "",
michael@0:          expected2);
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");