supported-locales-of.js

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// Tests supportedLocalesOf method.

var undef = Intl.DateTimeFormat.supportedLocalesOf();
assertEquals([], undef);

var empty = Intl.DateTimeFormat.supportedLocalesOf([]);
assertEquals([], empty);

var strLocale = Intl.DateTimeFormat.supportedLocalesOf('sr');
assertEquals('sr', strLocale[0]);

var multiLocale =
    Intl.DateTimeFormat.supportedLocalesOf(['sr-Thai-RS', 'de', 'zh-CN']);
assertEquals('sr-Thai-RS', multiLocale[0]);
assertEquals('de', multiLocale[1]);
assertEquals('zh-CN', multiLocale[2]);

collatorUndef = Intl.Collator.supportedLocalesOf();
assertEquals([], collatorUndef);

collatorEmpty = Intl.Collator.supportedLocalesOf([]);
assertEquals([], collatorEmpty);

collatorStrLocale = Intl.Collator.supportedLocalesOf('sr');
assertEquals('sr', collatorStrLocale[0]);

collatorMultiLocale =
    Intl.Collator.supportedLocalesOf(['sr-Thai-RS', 'de', 'zh-CN']);
assertEquals('sr-Thai-RS', collatorMultiLocale[0]);
assertEquals('de', collatorMultiLocale[1]);
assertEquals('zh-CN', collatorMultiLocale[2]);

numLocale = Intl.Collator.supportedLocalesOf(1);
assertEquals([], numLocale);

assertThrows(function() {
  numLocale = Intl.Collator.supportedLocalesOf([1]);
}, TypeError);

extensionLocale = Intl.Collator.supportedLocalesOf('id-u-co-pinyin');
assertEquals('id-u-co-pinyin', extensionLocale[0]);

bestFitLocale =
    Intl.Collator.supportedLocalesOf('de', {localeMatcher: 'best fit'});
assertEquals('de', bestFitLocale[0]);

// Need a better test for "lookup" once it differs from "best fit".
lookupLocale =
    Intl.Collator.supportedLocalesOf('zh-CN', {localeMatcher: 'lookup'});
assertEquals('zh-CN', lookupLocale[0]);

assertThrows(function() {
  Intl.Collator.supportedLocalesOf('id-u-co-pinyin', {localeMatcher: 'xyz'});
}, RangeError);