gecko-dev/netwerk/test/unit/test_channel_close.js

const {HttpServer} = ChromeUtils.import("resource://testing-common/httpd.js");
const {NetUtil} = ChromeUtils.import("resource://gre/modules/NetUtil.jsm");

XPCOMUtils.defineLazyGetter(this, "URL", function() {
  return "http://localhost:" + httpserver.identity.primaryPort;
});

var httpserver = new HttpServer();
var testpath = "/simple";
var httpbody = "0123456789";

var live_channels = [];

function run_test() {
  httpserver.registerPathHandler(testpath, serverHandler);
  httpserver.start(-1);

  var local_channel;

  // Opened channel that has no remaining references on shutdown
  local_channel = setupChannel(testpath);
  local_channel.asyncOpen2(new ChannelListener(checkRequest, local_channel));

  // Opened channel that has no remaining references after being opened
  setupChannel(testpath).asyncOpen2(new ChannelListener(function() {}, null));
  
  // Unopened channel that has remaining references on shutdown
  live_channels.push(setupChannel(testpath));

  // Opened channel that has remaining references on shutdown
  live_channels.push(setupChannel(testpath));
  live_channels[1].asyncOpen2(new ChannelListener(checkRequestFinish, live_channels[1]));

  do_test_pending();
}

function setupChannel(path) {
  var chan = NetUtil.newChannel({
    uri: URL + path,
    loadUsingSystemPrincipal: true
  });
  chan.QueryInterface(Ci.nsIHttpChannel);
  chan.requestMethod = "GET";
  return chan;
}

function serverHandler(metadata, response) {
  response.setHeader("Content-Type", "text/plain", false);
  response.bodyOutputStream.write(httpbody, httpbody.length);
}

function checkRequest(request, data, context) {
  Assert.equal(data, httpbody);
}

function checkRequestFinish(request, data, context) {
  checkRequest(request, data, context);
  httpserver.stop(do_test_finished);
}