// Copyright 2018 André Bargull. All rights reserved.
// This code is governed by the license found in the LICENSE file.

/*---
esid: sec-Intl.DateTimeFormat.prototype.resolvedOptions
description: >
  The resolved locale doesn't include a hc Unicode extension value if the
  hour12 or hourCycle option is also present.
info: |
  12.1.1 InitializeDateTimeFormat(dateTimeFormat, locales, options)
    ...
    6. Let hour12 be ? GetOption(options, "hour12", "boolean", undefined, undefined).
    7. Let hourCycle be ? GetOption(options, "hourCycle", "string", « "h11", "h12", "h23", "h24" », undefined).
    8. If hour12 is not undefined, then
      a. Let hourCycle be null.
    9. Set opt.[[hc]] to hourCycle.
    ...

  9.2.6 ResolveLocale(availableLocales, requestedLocales, options, relevantExtensionKeys, localeData)
    ...
    8. For each element key of relevantExtensionKeys in List order, do
      ...
      i. If options has a field [[<key>]], then
        i. Let optionsValue be options.[[<key>]].
        ii. Assert: Type(optionsValue) is either String, Undefined, or Null.
        iii. If keyLocaleData contains optionsValue, then
          1. If SameValue(optionsValue, value) is false, then
            a. Let value be optionsValue.
            b. Let supportedExtensionAddition be "".
      ...
---*/

var defaultLocale = new Intl.DateTimeFormat().resolvedOptions().locale;
var defaultLocaleWithHourCycle = defaultLocale + "-u-hc-h11";

function assertLocale(locale, expectedLocale, options, message) {
  var resolved = new Intl.DateTimeFormat(locale, {
    hour: "2-digit",
    hour12: options.hour12,
    hourCycle: options.hourCycle,
  }).resolvedOptions();
  assert.sameValue(resolved.locale, expectedLocale, message + " (With hour option.)");

  // Also test the case when no hour option is present at all.
  // The resolved options don't include hour12 and hourCycle if the date-time
  // formatter doesn't include an hour option. This restriction doesn't apply
  // to the hc Unicode extension value.
  resolved = new Intl.DateTimeFormat(locale, {
    hour12: options.hour12,
    hourCycle: options.hourCycle,
  }).resolvedOptions();
  assert.sameValue(resolved.locale, expectedLocale, message + " (Without hour option.)");
}

assertLocale(defaultLocaleWithHourCycle, defaultLocale, {
  hour12: false,
  hourCycle: "h23",
}, "hour12 and hourCycle options and hc Unicode extension value are present.");

assertLocale(defaultLocaleWithHourCycle, defaultLocale, {
  hour12: false,
}, "hour12 option and hc Unicode extension value are present.");

assertLocale(defaultLocaleWithHourCycle, defaultLocale, {
  hourCycle: "h23",
}, "hourCycle option and hc Unicode extension value are present.");

assertLocale(defaultLocaleWithHourCycle, defaultLocaleWithHourCycle, {
}, "Only hc Unicode extension value is present.");

// And make sure the hc Unicode extension doesn't get added if it's not present
// in the requested locale.
assertLocale(defaultLocale, defaultLocale, {
  hour12: false,
  hourCycle: "h23",
}, "hour12 and hourCycle options are present, but no hc Unicode extension value.");

assertLocale(defaultLocale, defaultLocale, {
  hour12: false,
}, "hourCycle option is present, but no hc Unicode extension value.");

assertLocale(defaultLocale, defaultLocale, {
  hourCycle: "h23",
}, "hourCycle option is present, but no hc Unicode extension value.");

assertLocale(defaultLocale, defaultLocale, {
}, "No options are present and no hc Unicode extension value.");