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/*
* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/licenses/publicdomain/
*/
//-----------------------------------------------------------------------------
var BUGNUMBER = 537863;
var summary =
'undefined, Infinity, and NaN global properties should not be writable';
print(BUGNUMBER + ": " + summary);
/**************
* BEGIN TEST *
**************/
var desc, old, error;
var global = this;
var names = ["NaN", "Infinity", "undefined"];
for (var i = 0; i < names.length; i++)
{
var name = names[i];
desc = Object.getOwnPropertyDescriptor(global, name);
assertEq(desc !== undefined, true, name + " should be present");
assertEq(desc.enumerable, false, name + " should not be enumerable");
assertEq(desc.configurable, false, name + " should not be configurable");
assertEq(desc.writable, false, name + " should not be writable");
old = global[name];
global[name] = 17;
assertEq(global[name], old, name + " changed on setting?");
error = "before";
try
{
throw new TypeError("SpiderMonkey doesn't currently implement " +
"strict-mode throwing when setting a readonly " +
"property, not running this bit of test for now; " +
"see bug 537873");
(function() { "use strict"; global[name] = 42; error = "didn't throw"; })();
}
catch (e)
{
if (e instanceof TypeError)
error = "typeerror";
else
error = "bad exception: " + e;
}
assertEq(error, "typeerror", "wrong strict mode error setting " + name);
}
/******************************************************************************/
reportCompare(true, true);
print("All tests passed!");
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