// Copyright (C) 2021 André Bargull. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
esid: sec-intl.supportedvaluesof
description: >
  The returned "currency" values can be used with NumberFormat.
info: |
  Intl.supportedValuesOf ( key )

  1. Let key be ? ToString(key).
  ...
  4. Else if key is "currency", then
    a. Let list be ! AvailableCurrencies( ).
  ...
  9. Return ! CreateArrayFromList( list ).

  AvailableCurrencies ( )
    The AvailableCurrencies abstract operation returns a List, ordered as if an
    Array of the same values had been sorted using %Array.prototype.sort% using
    undefined as comparefn, that contains unique, well-formed, and upper case
    canonicalized 3-letter ISO 4217 currency codes, identifying the currencies
    for which the implementation provides the functionality of Intl.DisplayNames
    and Intl.NumberFormat objects.
locale: [en]
features: [Intl-enumeration]
---*/

const currencies = Intl.supportedValuesOf("currency");

for (let currency of currencies) {
  let obj = new Intl.NumberFormat("en", {style: "currency", currency});
  assert.sameValue(obj.resolvedOptions().currency, currency,
                   `${currency} is supported by NumberFormat`);
}

// Note: We can't test that additional currency values not present in |currencies|
// aren't supported by Intl.NumberFormat, because PartitionNumberPattern defaults
// to using the currency code itself when the currency is unsupported:
//
// PartitionNumberPattern, step 8.k.iii:
// Let cd be an ILD String value representing currency after x in currencyDisplay form,
// which may depend on x in languages having different plural forms. If the
// implementation does not have such a representation of currency, use currency itself.