test262/test/intl402/NumberFormat/constructor-options-toobject.js

// Copyright (C) 2018 Ujjwal Sharma. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
esid: sec-initializenumberformat
description: >
  Tests that Intl.NumberFormat contructor converts the options argument
  to an object using `ToObject` (7.1.13).
info: |
  11.1.2 InitializeNumberFormat

  3.a. Let options be ? ToObject(options).
---*/

const toObjectResults = [
  [true, new Boolean(true)],
  [42, new Number(42)],
  ['foo', new String('foo')],
  [{}, {}],
  [Symbol(), Object(Symbol())]
];

// Test if ToObject is used to convert primitives to Objects.
toObjectResults.forEach(pair => {
  const [value, result] = pair;
  assert.sameValue(
    new Intl.NumberFormat(['en-US'], value).resolvedOptions(),
    new Intl.NumberFormat(['en-US'], result).resolvedOptions()
  );
});

// ToObject throws a TypeError for undefined and null, but it's not called
// when options is undefined.
assert.throws(TypeError, () => new Intl.NumberFormat(['en-US'], null));