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function noElement() {
for (var i = 0; i < 1e4; i++) {
var obj = {length: 0};
assertEq(obj[0], undefined);
}
}
function noElementCheckPrototype() {
for (var i = 0; i < 1e4; i++) {
var obj = {length: 0};
assertEq(obj[0], i <= 1e3 ? undefined : 1);
if (i == 1e3) {
Object.prototype[0] = 1;
}
}
delete Object.prototype[0];
}
function elementOnPrototype() {
Object.prototype[0] = 3;
for (var i = 0; i < 1e4; i++) {
var obj = {length: 0};
assertEq(obj[0], 3);
}
delete Object.prototype[0];
}
function checkExpando() {
for (var i = 0; i < 1e4; i++) {
var obj = {length: 0};
if (i >= 1e3) {
obj[0] = 2;
}
assertEq(obj[0], i < 1e3 ? undefined : 2);
}
}
noElement();
noElementCheckPrototype();
elementOnPrototype();
checkExpando();