Source code
Revision control
Copy as Markdown
Other Tools
// |reftest|
const indices = [
-10, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 10,
];
const arrays = [
// Dense no holes.
[],
[1],
[1,2],
[1,2,3],
[1,2,3,4],
[1,2,3,4,5,6,7,8],
// Dense trailing holes.
[,],
[1,,],
[1,2,,],
[1,2,3,,],
[1,2,3,4,,],
[1,2,3,4,5,6,7,8,,],
// Dense leading holes.
[,],
[,1],
[,1,2],
[,1,2,3],
[,1,2,3,4],
[,1,2,3,4,5,6,7,8],
// Dense with holes.
[1,,3],
[1,2,,4],
[1,,3,,5,6,,8],
];
const objects = arrays.map(array => {
let obj = {
length: array.length,
};
for (let i = 0; i < array.length; ++i) {
if (i in array) {
obj[i] = array[i];
}
}
return obj;
});
const objectsWithLargerDenseInitializedLength = arrays.map(array => {
let obj = {
length: array.length,
};
for (let i = 0; i < array.length; ++i) {
if (i in array) {
obj[i] = array[i];
}
}
// Add some extra dense elements after |length|.
for (let i = 0; i < 5; ++i) {
obj[array.length + i] = "extra";
}
return obj;
});
const thisValues = [
...arrays,
...objects,
...objectsWithLargerDenseInitializedLength,
];
const replacement = {};
for (let thisValue of thisValues) {
for (let index of indices) {
let actualIndex = index;
if (actualIndex < 0) {
actualIndex += thisValue.length;
}
if (actualIndex < 0 || actualIndex >= thisValue.length) {
continue;
}
let res = Array.prototype.with.call(thisValue, index, replacement);
assertEq(res.length, thisValue.length);
for (let i = 0; i < thisValue.length; ++i) {
assertEq(Object.hasOwn(res, i), true);
if (i === actualIndex) {
assertEq(res[i], replacement);
} else {
assertEq(res[i], thisValue[i]);
}
}
}
}
if (typeof reportCompare === "function")
reportCompare(0, 0);