gecko-dev/netwerk/test/unit/test_header_Accept-Language_case.js

"use strict";

var testpath = "/bug1054739";

function run_test() {
  let intlPrefs = Services.prefs.getBranch("intl.");

  let oldAcceptLangPref = intlPrefs.getCharPref("accept_languages");

  let testData = [
    ["en", "en"],
    ["ast", "ast"],
    ["fr-ca", "fr-CA"],
    ["zh-yue", "zh-yue"],
    ["az-latn", "az-Latn"],
    ["sl-nedis", "sl-nedis"],
    ["zh-hant-hk", "zh-Hant-HK"],
    ["ZH-HANT-HK", "zh-Hant-HK"],
    ["en-us-x-priv", "en-US-x-priv"],
    ["en-us-x-twain", "en-US-x-twain"],
    ["de, en-US, en", "de,en-US;q=0.7,en;q=0.3"],
    ["de,en-us,en", "de,en-US;q=0.7,en;q=0.3"],
    ["en-US, en", "en-US,en;q=0.5"],
    ["EN-US;q=0.2, EN", "en-US,en;q=0.5"],
    ["en ;q=0.8, de  ", "en,de;q=0.5"],
    [",en,", "en"],
  ];

  for (let i = 0; i < testData.length; i++) {
    let acceptLangPref = testData[i][0];
    let expectedHeader = testData[i][1];

    intlPrefs.setCharPref("accept_languages", acceptLangPref);
    let acceptLangHeader = setupChannel(testpath).getRequestHeader(
      "Accept-Language"
    );
    equal(acceptLangHeader, expectedHeader);
  }

  intlPrefs.setCharPref("accept_languages", oldAcceptLangPref);
}

function setupChannel(path) {
  let uri = NetUtil.newURI("http://localhost:4444" + path);
  let chan = NetUtil.newChannel({
    uri,
    loadUsingSystemPrincipal: true,
  });
  chan.QueryInterface(Ci.nsIHttpChannel);
  return chan;
}