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let invoked = false;
Object.defineProperty(Array.prototype, '0', {set: function () {
invoked = true;
}});
let result = [1, 2, 3].slice(1);
assertEq(invoked, false);
let proxy = new Proxy({}, {
get: function (target, name, proxy) {
switch (name) {
case "length":
return 2;
case "0":
return 15;
case "1":
// Should not invoke [[Get]] for this hole.
default:
assertEq(false, true);
}
},
has: function (target, name) {
switch (name) {
case "0":
return true;
case "1":
return false;
default:
assertEq(false, true);
}
}
})
result = Array.prototype.slice.call(proxy, 0);
assertEq(result.length, 2);
assertEq(0 in result, true);
assertEq(1 in result, false);
assertEq(result[0], 15);
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