The Tor Browser / file revision

 /*

  * Any copyright is dedicated to the Public Domain.

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

  */

 var list = [

     [1, 1, true],

     [0, 1, false],

     [3.5, 3.5, true],

     [0, 0, true],

     [0, -0, false],

     [-0, 0, false],

     [-0, -0, true],

     [true, true, true],

     [true, false, false],

     [false, false, true],

     [NaN, NaN, true],

     [NaN, undefined, false],

     [Infinity, -Infinity, false],

     [Infinity, Infinity, true],

 ]

 for (var test of list) {

     assertEq(Object.is(test[0], test[1]), test[2])

 }

 var obj = {}

 assertEq(Object.is(obj, obj), true);

 assertEq(Object.is(obj, {}), false);

 assertEq(Object.is([], []), false);

 assertEq(Object.is(null, null, null), true);

 /* Not defined parameters are undefined ... */

 assertEq(Object.is(null), false);

 assertEq(Object.is(undefined), true);

 assertEq(Object.is(), true);

 assertEq(Object.is.length, 2);