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// Any copyright is dedicated to the Public Domain.
// http://creativecommons.org/licenses/publicdomain/
//-----------------------------------------------------------------------------
var BUGNUMBER = 578273;
var summary =
"ES5: Properly detect cycles in JSON.stringify (throw TypeError, check for " +
"cycles rather than imprecisely rely on recursion limits)";
print(BUGNUMBER + ": " + summary);
/**************
* BEGIN TEST *
**************/
// objects
var count = 0;
var desc =
{
get: function() { count++; return obj; },
enumerable: true,
configurable: true
};
var obj = Object.defineProperty({ p1: 0 }, "p2", desc);
try
{
var str = JSON.stringify(obj);
assertEq(false, true, "should have thrown, got " + str);
}
catch (e)
{
assertEq(e instanceof TypeError, true,
"wrong error type: " + e.constructor.name);
assertEq(count, 1,
"cyclic data structures not detected immediately");
}
count = 0;
var obj2 = Object.defineProperty({}, "obj", desc);
try
{
var str = JSON.stringify(obj2);
assertEq(false, true, "should have thrown, got " + str);
}
catch (e)
{
assertEq(e instanceof TypeError, true,
"wrong error type: " + e.constructor.name);
assertEq(count, 2,
"cyclic data structures not detected immediately");
}
// arrays
var count = 0;
var desc =
{
get: function() { count++; return arr; },
enumerable: true,
configurable: true
};
var arr = Object.defineProperty([], "0", desc);
try
{
var str = JSON.stringify(arr);
assertEq(false, true, "should have thrown, got " + str);
}
catch (e)
{
assertEq(e instanceof TypeError, true,
"wrong error type: " + e.constructor.name);
assertEq(count, 1,
"cyclic data structures not detected immediately");
}
count = 0;
var arr2 = Object.defineProperty([], "0", desc);
try
{
var str = JSON.stringify(arr2);
assertEq(false, true, "should have thrown, got " + str);
}
catch (e)
{
assertEq(e instanceof TypeError, true,
"wrong error type: " + e.constructor.name);
assertEq(count, 2,
"cyclic data structures not detected immediately");
}
/******************************************************************************/
if (typeof reportCompare === "function")
reportCompare(true, true);
print("Tests complete");
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