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

/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* Any copyright is dedicated to the Public Domain.
 * http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

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

let httpserver;
let port;

function startHttpServer() {
  httpserver = new HttpServer();

  httpserver.registerPathHandler("/resource", (metadata, response) => {
    response.setStatusLine(metadata.httpVersion, 200, "OK");
    response.setHeader("Content-Type", "text/plain", false);
    response.setHeader("Cache-Control", "no-cache", false);
    response.bodyOutputStream.write("data", 4);
  });

  httpserver.registerPathHandler("/redirect", (metadata, response) => {
    response.setStatusLine(metadata.httpVersion, 302, "Redirect");
    response.setHeader("Location", "/resource", false);
    response.setHeader("Cache-Control", "no-cache", false);
  });

  httpserver.start(-1);
  port = httpserver.identity.primaryPort;
}

function stopHttpServer() {
  httpserver.stop(() => {});
}

function makeRequest(uri) {
  let requestChannel = NetUtil.newChannel({
    uri,
    loadUsingSystemPrincipal: true,
  });
  requestChannel.QueryInterface(Ci.nsISupportsPriority);
  requestChannel.priority = Ci.nsISupportsPriority.PRIORITY_HIGHEST;
  requestChannel.asyncOpen(new ChannelListener(checkResponse, requestChannel));
}

function checkResponse(request, buffer, requestChannel) {
  requestChannel.QueryInterface(Ci.nsISupportsPriority);
  Assert.equal(
    requestChannel.priority,
    Ci.nsISupportsPriority.PRIORITY_HIGHEST
  );

  // the response channel can be different (if it was redirected)
  let responseChannel = request.QueryInterface(Ci.nsISupportsPriority);
  Assert.equal(
    responseChannel.priority,
    Ci.nsISupportsPriority.PRIORITY_HIGHEST
  );

  run_next_test();
}

add_test(function test_regular_request() {
  makeRequest(`http://localhost:${port}/resource`);
});

add_test(function test_redirect() {
  makeRequest(`http://localhost:${port}/redirect`);
});

function run_test() {
  // jshint ignore:line
  if (!runningInParent) {
    // add a task to report test finished to parent process at the end of test queue,
    // since do_register_cleanup is not available in child xpcshell test script.
    add_test(function() {
      do_send_remote_message("finished");
      run_next_test();
    });

    // waiting for parent process to assign server port via configPort()
    return;
  }

  startHttpServer();
  registerCleanupFunction(stopHttpServer);
  run_next_test();
}

// This is used by unit_ipc/test_channel_priority_wrap.js for e10s XPCShell test
/* exported configPort */
function configPort(serverPort) {
  // jshint ignore:line
  port = serverPort;
  run_next_test();
}