gecko-dev/dom/workers/test/onLine_worker_child.js

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

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

function info(text) {
  dump("Test for Bug 925437: worker: " + text + "\n");
}

function ok(test, message) {
  postMessage({ type: "ok", test, message });
}

/**
 * Returns a handler function for an online/offline event. The returned handler
 * ensures the passed event object has expected properties and that the handler
 * is called at the right moment (according to the gState variable).
 * @param nameTemplate The string identifying the hanlder. '%1' in that
 *                     string will be replaced with the event name.
 * @param eventName 'online' or 'offline'
 * @param expectedState value of gState at the moment the handler is called.
 *                       The handler increases gState by one before checking
 *                       if it matches expectedState.
 */
function makeHandler(nameTemplate, eventName, expectedState, prefix, custom) {
  prefix += ": ";
  return function(e) {
    var name = nameTemplate.replace(/%1/, eventName);
    ok(e.constructor == Event, prefix + "event should be an Event");
    ok(e.type == eventName, prefix + "event type should be " + eventName);
    ok(!e.bubbles, prefix + "event should not bubble");
    ok(!e.cancelable, prefix + "event should not be cancelable");
    ok(
      e.target == self,
      prefix + "the event target should be the worker scope"
    );
    ok(
      eventName == "online" ? navigator.onLine : !navigator.onLine,
      prefix +
        "navigator.onLine " +
        navigator.onLine +
        " should reflect event " +
        eventName
    );

    if (custom) {
      custom();
    }
  };
}

var lastTest = false;

function lastTestTest() {
  if (lastTest) {
    postMessage({ type: "finished" });
    close();
  }
}

for (var event of ["online", "offline"]) {
  addEventListener(
    event,
    makeHandler(
      "addEventListener('%1', ..., false)",
      event,
      1,
      "Child Worker",
      lastTestTest
    ),
    false
  );
}

onmessage = function(e) {
  if (e.data.type === "lastTest") {
    lastTest = true;
  } else if (e.data.type === "navigatorState") {
    ok(
      e.data.state === navigator.onLine,
      "Child and parent navigator state should match"
    );
  }
};

postMessage({ type: "ready" });