const max = Number.MAX_SAFE_INTEGER; assertEq(Array.prototype.indexOf.call({length: Infinity, [max - 1]: 'test'}, 'test', max - 3), max - 1); assertEq(Array.prototype.lastIndexOf.call({length: Infinity, [max - 2]: 'test', [max - 1]: 'test2'}, 'test'), max - 2); // ToLength doesn't truncate Infinity to zero, so the callback should be invoked assertThrowsValue(() => Array.prototype.every.call({length: Infinity, [0]: undefined}, () => { throw "invoked" }), "invoked"); assertThrowsValue(() => Array.prototype.some.call({length: Infinity, [0]: undefined}, () => { throw "invoked" }), "invoked"); // Timeout before calling our callback // assertThrowsValue(() => Array.prototype.sort.call({length: Infinity}, () => { throw "invoked" }), "invoked"); assertThrowsValue(() => Array.prototype.forEach.call({length: Infinity, [0]: undefined}, () => { throw "invoked" }), "invoked"); assertThrowsValue(() => Array.prototype.filter.call({length: Infinity, [0]: undefined}, () => { throw "invoked" }), "invoked"); assertThrowsValue(() => Array.prototype.reduce.call({length: Infinity, [0]: undefined, [1]: undefined}, () => { throw "invoked" }), "invoked"); assertThrowsValue(() => Array.prototype.reduceRight.call({length: Infinity, [max - 1]: undefined, [max - 2]: undefined}, () => { throw "invoked" }), "invoked"); assertThrowsValue(() => Array.prototype.find.call({length: Infinity}, () => { throw "invoked" }), "invoked"); assertThrowsValue(() => Array.prototype.findIndex.call({length: Infinity}, () => { throw "invoked" }), "invoked"); assertThrowsValue(() => Array.prototype.fill.call({length: Infinity, set "0"(v) { throw "invoked"; }}, () => { throw "invoked" }), "invoked"); assertThrowsValue(() => Array.prototype.copyWithin.call({length: Infinity, get [max - 2]() { throw "invoked"; }}, max - 2, max - 2), "invoked"); assertEq(Array.prototype.includes.call({length: Infinity, [max - 1]: "test"}, "test", max - 3), true); // Invoking the Array constructor with MAX_SAFE_INTEGER will throw, 0 won't assertThrowsInstanceOf(() => Array.from({length: Infinity}), RangeError); // Make sure ArraySpeciesCreate is called with ToLength applied to the length property var proxy = new Proxy([], { get(target, property) { if (property === "length") return Infinity; assertEq(property, "constructor"); function fakeConstructor(length) { assertEq(length, max); throw "invoked"; }; fakeConstructor[Symbol.species] = fakeConstructor; return fakeConstructor; } }) assertThrowsValue(() => Array.prototype.map.call(proxy, () => { }), "invoked"); if (typeof reportCompare === "function") reportCompare(true, true);