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