valueOf.js - mozsearch

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/* Any copyright is dedicated to the Public Domain.

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

var symbols = [

    Symbol(),

    Symbol("ok"),

    Symbol.for("dummies"),

    Symbol.iterator

];

for (var sym of symbols) {

    assertEq(sym.valueOf(), sym);

    assertEq(Object(sym).valueOf(), sym);

// Any other value throws.

var nonsymbols = [undefined, null, NaN, {}, Symbol.prototype];

for (var nonsym of nonsymbols)

    assertThrowsInstanceOf(() => Symbol.prototype.valueOf.call(nonsym), TypeError);

if (typeof reportCompare === "function")

    reportCompare(0, 0);