text: // Copyright 2013 the V8 project authors. All rights reserved.
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  // Tests supportedLocalesOf method.
  
  // Flags: --harmony-intl-segmenter
  
  var services = [
    Intl.Collator,
    Intl.DateTimeFormat,
    Intl.NumberFormat,
    Intl.ListFormat,
    Intl.PluralRules,
    Intl.RelativeTimeFormat,
    Intl.Segmenter,
    Intl.v8BreakIterator,
  ];
  
  for (const service of services) {
    let undef = service.supportedLocalesOf();
    assertEquals([], undef);
  
    let empty = service.supportedLocalesOf([]);
    assertEquals([], empty);
  
    let strLocale = service.supportedLocalesOf("sr");
    assertEquals("sr", strLocale[0]);
  
    var locales = ["sr-Thai-RS", "de", "zh-CN"];
    let multiLocale = service.supportedLocalesOf(locales);
    assertEquals("sr-Thai-RS", multiLocale[0]);
    assertEquals("de", multiLocale[1]);
    assertEquals("zh-CN", multiLocale[2]);
  
    let numLocale = service.supportedLocalesOf(1);
    assertEquals([], numLocale);
    assertThrows(function() {
      numLocale = Intl.Collator.supportedLocalesOf([1]);
    }, TypeError);
  
    extensionLocale = service.supportedLocalesOf("id-u-co-pinyin");
    assertEquals("id-u-co-pinyin", extensionLocale[0]);
  
    bestFitLocale = service.supportedLocalesOf("de", {
      localeMatcher: "best fit"
    });
    assertEquals("de", bestFitLocale[0]);
  
    // Need a better test for "lookup" once it differs from "best fit".
    lookupLocale = service.supportedLocalesOf("zh-CN", {
      localeMatcher: "lookup"
    });
    assertEquals("zh-CN", lookupLocale[0]);
  
    assertThrows(function() {
      service.supportedLocalesOf("id-u-co-pinyin", { localeMatcher: "xyz" });
    }, RangeError);
  
    privateuseLocale = service.supportedLocalesOf("en-US-x-twain");
    assertEquals("en-US-x-twain", privateuseLocale[0]);
  
    privateuseLocale2 = service.supportedLocalesOf("x-twain");
    assertEquals(undefined, privateuseLocale2[0]);
  
    grandfatheredLocale = service.supportedLocalesOf("art-lojban");
    assertEquals(undefined, grandfatheredLocale[0]);
  
    grandfatheredLocale2 = service.supportedLocalesOf("i-pwn");
    assertEquals(undefined, grandfatheredLocale2[0]);
  
    unicodeInPrivateuseLocale = service.supportedLocalesOf(
      "en-US-x-u-co-phonebk"
    );
    assertEquals("en-US-x-u-co-phonebk", unicodeInPrivateuseLocale[0]);
  }
  