text: /* This Source Code Form is subject to the terms of the Mozilla Public
   * License, v. 2.0. If a copy of the MPL was not distributed with this
   * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  "use strict";
  
  const { Loader } = require("sdk/test/loader");
  const hiddenFrames = require("sdk/frame/hidden-frame");
  const { HiddenFrame } = hiddenFrames;
  
  exports["test Frame"] = function(assert, done) {
    let url = "data:text/html;charset=utf-8,<!DOCTYPE%20html>";
  
    let hiddenFrame = hiddenFrames.add(HiddenFrame({
      onReady: function () {
        assert.equal(this.element.contentWindow.location, "about:blank",
                         "HiddenFrame loads about:blank by default.");
  
        function onDOMReady() {
          hiddenFrame.element.removeEventListener("DOMContentLoaded", onDOMReady,
                                                  false);
          assert.equal(hiddenFrame.element.contentWindow.location, url,
                           "HiddenFrame loads the specified content.");
          done();
        }
  
        this.element.addEventListener("DOMContentLoaded", onDOMReady, false);
        this.element.setAttribute("src", url);
      }
    }));
  };
  
  exports["test frame removed properly"] = function(assert, done) {
    let url = "data:text/html;charset=utf-8,<!DOCTYPE%20html>";
  
    let hiddenFrame = hiddenFrames.add(HiddenFrame({
      onReady: function () {
        let frame = this.element;
        assert.ok(frame.parentNode, "frame has a parent node");
        hiddenFrames.remove(hiddenFrame);
        assert.ok(!frame.parentNode, "frame no longer has a parent node");
        done();
      }
    }));
  };
  
  exports["test unload detaches panels"] = function(assert, done) {
    let loader = Loader(module);
    let { add, remove, HiddenFrame } = loader.require("sdk/frame/hidden-frame");
    let frames = []
  
    function ready() {
      frames.push(this.element);
      if (frames.length === 2) complete();
    }
  
    add(HiddenFrame({ onReady: ready }));
    add(HiddenFrame({ onReady: ready }));
  
    function complete() {
      frames.forEach(function(frame) {
        assert.ok(frame.parentNode, "frame is in the document");
      })
      loader.unload();
      frames.forEach(function(frame) {
        assert.ok(!frame.parentNode, "frame isn't in the document'");
      });
      done();
    }
  };
  
  require("test").run(exports);
  