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// |reftest| skip -- set-methods is not supported
// Copyright (C) 2023 Anthony Frehner and Kevin Gibbons. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-set.prototype.isdisjointfrom
description: Set.prototype.isDisjointFrom calls a Set-like class's methods in order
features: [set-methods]
includes: [compareArray.js]
---*/
let observedOrder = [];
function observableIterator() {
let values = ["a", "b", "c"];
let index = 0;
return {
get next() {
observedOrder.push("getting next");
return function () {
observedOrder.push("calling next");
return {
get done() {
observedOrder.push("getting done");
return index >= values.length;
},
get value() {
observedOrder.push("getting value");
return values[index++];
},
};
};
},
};
}
class MySetLike {
get size() {
observedOrder.push("getting size");
return {
valueOf: function () {
observedOrder.push("ToNumber(size)");
return 3;
},
};
}
get has() {
observedOrder.push("getting has");
return function (v) {
observedOrder.push("calling has");
return ["a", "b", "c"].indexOf(v) !== -1;
};
}
get keys() {
observedOrder.push("getting keys");
return function () {
observedOrder.push("calling keys");
return observableIterator();
};
}
}
// this is smaller than argument
{
observedOrder = [];
const s1 = new Set(["x", "b"]);
const s2 = new MySetLike();
const result = s1.isDisjointFrom(s2);
const expectedOrder = [
"getting size",
"ToNumber(size)",
"getting has",
"getting keys",
// two calls to has
"calling has",
"calling has",
];
assert.sameValue(result, false);
assert.compareArray(observedOrder, expectedOrder);
}
// this is same size as argument - stops eagerly
{
observedOrder = [];
const s1 = new Set(["x", "b", "y"]);
const s2 = new MySetLike();
const result = s1.isDisjointFrom(s2);
const expectedOrder = [
"getting size",
"ToNumber(size)",
"getting has",
"getting keys",
// two calls to has
"calling has",
"calling has",
];
assert.sameValue(result, false);
assert.compareArray(observedOrder, expectedOrder);
}
// this is same size as argument - full run
{
observedOrder = [];
const s1 = new Set(["x", "y", "z"]);
const s2 = new MySetLike();
const result = s1.isDisjointFrom(s2);
const expectedOrder = [
"getting size",
"ToNumber(size)",
"getting has",
"getting keys",
// three calls to has
"calling has",
"calling has",
"calling has",
];
assert.sameValue(result, true);
assert.compareArray(observedOrder, expectedOrder);
}
// this is larger than argument - stops eagerly
{
observedOrder = [];
const s1 = new Set(["x", "b", "y", "z"]);
const s2 = new MySetLike();
const result = s1.isDisjointFrom(s2);
const expectedOrder = [
"getting size",
"ToNumber(size)",
"getting has",
"getting keys",
"calling keys",
"getting next",
// first iteration, has value
"calling next",
"getting done",
"getting value",
// second iteration, has value
"calling next",
"getting done",
"getting value",
];
assert.sameValue(result, false);
assert.compareArray(observedOrder, expectedOrder);
}
// this is larger than argument - full run
{
observedOrder = [];
const s1 = new Set(["x", "y", "z", "w"]);
const s2 = new MySetLike();
const result = s1.isDisjointFrom(s2);
const expectedOrder = [
"getting size",
"ToNumber(size)",
"getting has",
"getting keys",
"calling keys",
"getting next",
// first iteration, has value
"calling next",
"getting done",
"getting value",
// second iteration, has value
"calling next",
"getting done",
"getting value",
// third iteration, has value
"calling next",
"getting done",
"getting value",
// fourth iteration, done
"calling next",
"getting done",
];
assert.sameValue(result, true);
assert.compareArray(observedOrder, expectedOrder);
}
reportCompare(0, 0);
|
