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<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1337234
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<head>
  <title>Test for Bug 1337234</title>
  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1337234">Mozilla Bug 1337234</a>
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<div id="content" style="display: none">
<script>

const localeService =
  Cc["@mozilla.org/intl/localeservice;1"].getService(Ci.mozILocaleService);

let rpLocales = localeService.negotiateLanguages(window.getRegionalPrefsLocales(),
                                                 localeService.availableLocales);

ok(rpLocales.length, "getRegionalPrefsLocales returns at least one locale.");
is(rpLocales[0], "en-US", "The first regional prefs locale should resolve to en-US.");

</script>
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