gecko-dev/netwerk/test/browser/browser_child_resource.js

/*
Any copyright is dedicated to the Public Domain.
http://creativecommons.org/publicdomain/zero/1.0/
*/

// This must be loaded in the remote process for this test to be useful
const TEST_URL = "http://example.com/browser/netwerk/test/browser/dummy.html";

const expectedRemote = gMultiProcessBrowser ? "true" : "";

ChromeUtils.import("resource://gre/modules/Services.jsm");
const resProtocol = Cc["@mozilla.org/network/protocol;1?name=resource"]
                        .getService(Ci.nsIResProtocolHandler);

function frameScript() {
  ChromeUtils.import("resource://gre/modules/Services.jsm");
  let resProtocol = Cc["@mozilla.org/network/protocol;1?name=resource"]
                      .getService(Ci.nsIResProtocolHandler);

  addMessageListener("Test:ResolveURI", function({ data: uri }) {
    uri = Services.io.newURI(uri);
    try {
      let resolved = resProtocol.resolveURI(uri);
      sendAsyncMessage("Test:ResolvedURI", resolved);
    }
    catch (e) {
      sendAsyncMessage("Test:ResolvedURI", null);
    }
  });
}

function waitForEvent(obj, name, capturing, chromeEvent) {
  info("Waiting for " + name);
  return new Promise((resolve) => {
    function listener(event) {
      info("Saw " + name);
      obj.removeEventListener(name, listener, capturing, chromeEvent);
      resolve(event);
    }

    obj.addEventListener(name, listener, capturing, chromeEvent);
  });
}

function resolveURI(uri) {
  uri = Services.io.newURI(uri);
  try {
    return resProtocol.resolveURI(uri);
  }
  catch (e) {
    return null;
  }
}

function remoteResolveURI(uri) {
  return new Promise((resolve) => {
    let manager = gBrowser.selectedBrowser.messageManager;

    function listener({ data: resolved }) {
      manager.removeMessageListener("Test:ResolvedURI", listener);
      resolve(resolved);
    }

    manager.addMessageListener("Test:ResolvedURI", listener);
    manager.sendAsyncMessage("Test:ResolveURI", uri);
  });
}

var loadTestTab = async function() {
  gBrowser.selectedTab = BrowserTestUtils.addTab(gBrowser, TEST_URL);
  let browser = gBrowser.selectedBrowser;
  await BrowserTestUtils.browserLoaded(browser);
  browser.messageManager.loadFrameScript("data:,(" + frameScript.toString() + ")();", true);
  return browser;
};

// Restarts the child process by crashing it then reloading the tab
var restart = async function() {
  let browser = gBrowser.selectedBrowser;
  // If the tab isn't remote this would crash the main process so skip it
  if (browser.getAttribute("remote") != "true")
    return browser;

  await BrowserTestUtils.crashBrowser(browser);

  browser.reload();

  await BrowserTestUtils.browserLoaded(browser);
  is(browser.getAttribute("remote"), expectedRemote, "Browser should be in the right process");
  browser.messageManager.loadFrameScript("data:,(" + frameScript.toString() + ")();", true);
  return browser;
};

// Sanity check that this test is going to be useful
add_task(async function() {
  let browser = await loadTestTab();

  // This must be loaded in the remote process for this test to be useful
  is(browser.getAttribute("remote"), expectedRemote, "Browser should be in the right process");

  let local = resolveURI("resource://gre/modules/Services.jsm");
  let remote = await remoteResolveURI("resource://gre/modules/Services.jsm");
  is(local, remote, "Services.jsm should resolve in both processes");

  gBrowser.removeCurrentTab();
});

// Add a mapping, update it then remove it
add_task(async function() {
  let browser = await loadTestTab();

  info("Set");
  resProtocol.setSubstitution("testing", Services.io.newURI("chrome://global/content"));
  let local = resolveURI("resource://testing/test.js");
  let remote = await remoteResolveURI("resource://testing/test.js");
  is(local, "chrome://global/content/test.js", "Should resolve in main process");
  is(remote, "chrome://global/content/test.js", "Should resolve in child process");

  info("Change");
  resProtocol.setSubstitution("testing", Services.io.newURI("chrome://global/skin"));
  local = resolveURI("resource://testing/test.js");
  remote = await remoteResolveURI("resource://testing/test.js");
  is(local, "chrome://global/skin/test.js", "Should resolve in main process");
  is(remote, "chrome://global/skin/test.js", "Should resolve in child process");

  info("Clear");
  resProtocol.setSubstitution("testing", null);
  local = resolveURI("resource://testing/test.js");
  remote = await remoteResolveURI("resource://testing/test.js");
  is(local, null, "Shouldn't resolve in main process");
  is(remote, null, "Shouldn't resolve in child process");

  gBrowser.removeCurrentTab();
});

// Add a mapping, restart the child process then check it is still there
add_task(async function() {
  let browser = await loadTestTab();

  info("Set");
  resProtocol.setSubstitution("testing", Services.io.newURI("chrome://global/content"));
  let local = resolveURI("resource://testing/test.js");
  let remote = await remoteResolveURI("resource://testing/test.js");
  is(local, "chrome://global/content/test.js", "Should resolve in main process");
  is(remote, "chrome://global/content/test.js", "Should resolve in child process");

  await restart();

  local = resolveURI("resource://testing/test.js");
  remote = await remoteResolveURI("resource://testing/test.js");
  is(local, "chrome://global/content/test.js", "Should resolve in main process");
  is(remote, "chrome://global/content/test.js", "Should resolve in child process");

  info("Change");
  resProtocol.setSubstitution("testing", Services.io.newURI("chrome://global/skin"));

  await restart();

  local = resolveURI("resource://testing/test.js");
  remote = await remoteResolveURI("resource://testing/test.js");
  is(local, "chrome://global/skin/test.js", "Should resolve in main process");
  is(remote, "chrome://global/skin/test.js", "Should resolve in child process");

  info("Clear");
  resProtocol.setSubstitution("testing", null);

  await restart();

  local = resolveURI("resource://testing/test.js");
  remote = await remoteResolveURI("resource://testing/test.js");
  is(local, null, "Shouldn't resolve in main process");
  is(remote, null, "Shouldn't resolve in child process");

  gBrowser.removeCurrentTab();
});

// Adding a mapping to a resource URI should work
add_task(async function() {
  let browser = await loadTestTab();

  info("Set");
  resProtocol.setSubstitution("testing", Services.io.newURI("chrome://global/content"));
  resProtocol.setSubstitution("testing2", Services.io.newURI("resource://testing"));
  let local = resolveURI("resource://testing2/test.js");
  let remote = await remoteResolveURI("resource://testing2/test.js");
  is(local, "chrome://global/content/test.js", "Should resolve in main process");
  is(remote, "chrome://global/content/test.js", "Should resolve in child process");

  info("Clear");
  resProtocol.setSubstitution("testing", null);
  local = resolveURI("resource://testing2/test.js");
  remote = await remoteResolveURI("resource://testing2/test.js");
  is(local, "chrome://global/content/test.js", "Should resolve in main process");
  is(remote, "chrome://global/content/test.js", "Should resolve in child process");

  resProtocol.setSubstitution("testing2", null);
  local = resolveURI("resource://testing2/test.js");
  remote = await remoteResolveURI("resource://testing2/test.js");
  is(local, null, "Shouldn't resolve in main process");
  is(remote, null, "Shouldn't resolve in child process");

  gBrowser.removeCurrentTab();
});