includes.js - mozsearch

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/*

 * Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/licenses/publicdomain/

*/

var BUGNUMBER = 1069063;

var summary = "Implement Array.prototype.includes";

print(BUGNUMBER + ": " + summary);

assertEq(typeof [].includes, "function");

assertEq([].includes.length, 1);

assertTrue([1, 2, 3].includes(2));

assertTrue([1,,2].includes(2));

assertTrue([1, 2, 3].includes(2, 1));

assertTrue([1, 2, 3].includes(2, -2));

assertTrue([1, 2, 3].includes(2, -100));

assertTrue([Object, Function, Array].includes(Function));

assertTrue([-0].includes(0));

assertTrue([NaN].includes(NaN));

assertTrue([,].includes());

assertTrue(staticIncludes("123", "2"));

assertTrue(staticIncludes({length: 3, 1: 2}, 2));

assertTrue(staticIncludes({length: 3, 1: 2, get 3(){throw ""}}, 2));

assertTrue(staticIncludes({length: 3, get 1() {return 2}}, 2));

assertTrue(staticIncludes({__proto__: {1: 2}, length: 3}, 2));

assertTrue(staticIncludes(new Proxy([1], {get(){return 2}}), 2));

assertFalse([1, 2, 3].includes("2"));

assertFalse([1, 2, 3].includes(2, 2));

assertFalse([1, 2, 3].includes(2, -1));

assertFalse([undefined].includes(NaN));

assertFalse([{}].includes({}));

assertFalse(staticIncludes({length: 3, 1: 2}, 2, 2));

assertFalse(staticIncludes({length: 3, get 0(){delete this[1]}, 1: 2}, 2));

assertFalse(staticIncludes({length: -100, 0: 1}, 1));

assertThrowsInstanceOf(() => staticIncludes(), TypeError);

assertThrowsInstanceOf(() => staticIncludes(null), TypeError);

assertThrowsInstanceOf(() => staticIncludes({get length(){throw TypeError()}}), TypeError);

assertThrowsInstanceOf(() => staticIncludes({length: 3, get 1() {throw TypeError()}}, 2), TypeError);

assertThrowsInstanceOf(() => staticIncludes({__proto__: {get 1() {throw TypeError()}}, length: 3}, 2), TypeError);

assertThrowsInstanceOf(() => staticIncludes(new Proxy([1], {get(){throw TypeError()}})), TypeError);

function assertTrue(v) {

    assertEq(v, true);

function assertFalse(v) {

    assertEq(v, false);

function staticIncludes(o, v, f) {

    return [].includes.call(o, v, f);

if (typeof reportCompare === "function")

    reportCompare(true, true);