gecko/content/base/test/chrome/cpows_parent.xul

<?xml version="1.0"?>
<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css"
                 type="text/css"?>
<window title="MessageManager CPOW tests"
  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
  onload="start()">

  <!-- test results are displayed in the html:body -->
  <label value="CPOWs"/>

  <script type="application/javascript"><![CDATA[
    var test_state = "remote";
    var test_node = null;

    function ok(condition, message) {
      return opener.wrappedJSObject.ok(condition, message);
    }

    function testCpowMessage(message) {
      ok(message.json.check == "ok", "correct json");

      let data = message.objects.data;
      let document = message.objects.document;
      ok(data.i === 5, "integer property");
      ok(data.b === true, "boolean property");
      ok(data.s === "hello", "string property");
      ok(data.x.i === 10, "nested property");
      ok(data.f() === 99, "function call");
      ok(document.title === "Hello, Kitty", "document node");

      data.i = 6;
      data.b = false;
      data.s = "bye";
      data.x = null;
      ok(data.i === 6, "integer property");
      ok(data.b === false, "boolean property");
      ok(data.s === "bye", "string property");
      ok(data.x === null, "nested property");

      let throwing = message.objects.throwing;
      // Based on the table on:
      // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy
      let tests = [
        () => Object.getOwnPropertyDescriptor(throwing, 'test'),
        () => Object.getOwnPropertyNames(throwing),
        () => Object.defineProperty(throwing, 'test', {value: 1}),
        () => delete throwing.test,
        () => "test" in throwing,
        () => Object.prototype.hasOwnProperty.call(throwing, 'test'),
        () => throwing.test,
        () => { throwing.test = 1 },
        // () => { for (let prop in throwing) {} }, Bug 783829
        () => { for (let prop of throwing) {} },
        () => Object.keys(throwing),
        () => Function.prototype.call.call(throwing),
        () => new throwing,
        () => Object.preventExtensions(throwing),
        () => Object.freeze(throwing),
        () => Object.seal(throwing),
      ]

      for (let test of tests) {
        let threw = false;
        try {
          test()
        } catch (e) {
          threw = true;
        }
        ok(threw, "proxy operation threw exception");
      }

    }

    function recvAsyncMessage(message) {
      testCpowMessage(message);
    }

    function recvSyncMessage(message) {
      testCpowMessage(message);
    }

    function recvFailMessage(message) {
      ok(false, message.json.message);
    }

    function recvDoneMessage(message) {
      if (test_state == "remote") {
        test_node.parentNode.removeChild(test_node);
        run_tests("inprocess");
        return;
      }

      finish();
    }

    function run_tests(type) {
      var node = document.getElementById('cpowbrowser_' + type);

      test_state = type;
      test_node = node;

      var mm = node.messageManager;
      mm.addMessageListener("cpows:async", recvAsyncMessage);
      mm.addMessageListener("cpows:sync", recvSyncMessage);
      mm.addMessageListener("cpows:done", recvDoneMessage);
      mm.addMessageListener("cpows:fail", recvFailMessage);
      mm.loadFrameScript("chrome://mochitests/content/chrome/content/base/test/chrome/cpows_child.js", true);
    }

    function start() {
      run_tests('remote');
    }

    function finish() {
      opener.setTimeout("done()", 0);
      window.close();
    }
  ]]></script>

  <browser type="content" src="about:blank" id="cpowbrowser_remote" remote="true"/>
  <browser type="content" src="about:blank" id="cpowbrowser_inprocess"/>
</window>