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// |reftest| skip-if(!this.hasOwnProperty("Record"))
var boxO = Object(#[1, 2, 3]);
assertEq(Object.isExtensible(boxO), false);
assertEq(Object.isSealed(boxO), true);
assertEq(Object.isFrozen(boxO), true);
boxO[0] = 3;
assertEq(boxO[0], 1);
assertThrowsInstanceOf(() => { "use strict"; boxO[0] = 3; }, TypeError);
assertEq(boxO[0], 1);
boxO[4] = 3;
assertEq(boxO[4], undefined);
assertThrowsInstanceOf(() => { "use strict"; boxO[4] = 3; }, TypeError);
assertEq(boxO[4], undefined);
assertThrowsInstanceOf(() => { Object.defineProperty(boxO, "0", { value: 3 }); }, TypeError);
assertEq(boxO[0], 1);
assertThrowsInstanceOf(() => { Object.defineProperty(boxO, "4", { value: 3 }); }, TypeError);
assertEq(boxO[4], undefined);
if (typeof reportCompare === "function") reportCompare(0, 0);