michael@0: /*
michael@0:  * Any copyright is dedicated to the Public Domain.
michael@0:  * http://creativecommons.org/licenses/publicdomain/
michael@0:  * Contributor:
michael@0:  *   Jeff Walden <jwalden+code@mit.edu>
michael@0:  */
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: var BUGNUMBER = 858381;
michael@0: var summary =
michael@0:   "Array length redefinition behavior with non-configurable elements";
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];
michael@0: Object.defineProperty(arr, 1, { configurable: false });
michael@0: 
michael@0: try
michael@0: {
michael@0:   Object.defineProperty(arr, "length", { value: 0, writable: false });
michael@0: }
michael@0: catch (e)
michael@0: {
michael@0:   assertEq(e instanceof TypeError, true,
michael@0:            "must throw TypeError when array truncation would have to remove " +
michael@0:            "non-configurable elements");
michael@0: }
michael@0: 
michael@0: assertEq(arr.length, 2, "length is highest remaining index plus one");
michael@0: 
michael@0: var desc = Object.getOwnPropertyDescriptor(arr, "length");
michael@0: assertEq(desc !== undefined, true);
michael@0: 
michael@0: assertEq(desc.value, 2);
michael@0: assertEq(desc.writable, false);
michael@0: assertEq(desc.enumerable, false);
michael@0: assertEq(desc.configurable, false);
michael@0: 
michael@0: /******************************************************************************/
michael@0: 
michael@0: if (typeof reportCompare === "function")
michael@0:   reportCompare(true, true);
michael@0: 
michael@0: print("Tests complete");