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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>web_channel_test (iframe)</title>
</head>
<body>
<script>
  var REDIRECTED_IFRAME_SRC_ROOT = "http://example.org/" + location.pathname;

  window.onload = function() {
    var testName = window.location.search.replace(/^\?/, "");
    switch (testName) {
      case "iframe":
        test_iframe();
        break;
      case "iframe_pre_redirect":
        test_iframe_pre_redirect();
        break;
      case "iframe_post_redirect":
        test_iframe_post_redirect();
        break;
      default:
        throw new Error(`INVALID TEST NAME ${testName}`);
    }
  };

  function test_iframe() {
    var firstMessage = new window.CustomEvent("WebChannelMessageToChrome", {
      detail: JSON.stringify({
        id: "twoway",
        message: {
          command: "one",
        },
      }),
    });

    window.addEventListener("WebChannelMessageToContent", function(e) {
      var secondMessage = new window.CustomEvent("WebChannelMessageToChrome", {
        detail: JSON.stringify({
          id: "twoway",
          message: {
            command: "two",
            detail: e.detail.message,
          },
        }),
      });

      if (!e.detail.message.error) {
        window.dispatchEvent(secondMessage);
      }
    }, true);

    window.dispatchEvent(firstMessage);
  }


  function test_iframe_pre_redirect() {
    var firstMessage = new window.CustomEvent("WebChannelMessageToChrome", {
      detail: JSON.stringify({
        id: "pre_redirect",
        message: {
          command: "redirecting",
        },
      }),
    });
    window.dispatchEvent(firstMessage);
    document.location = REDIRECTED_IFRAME_SRC_ROOT + "?iframe_post_redirect";
  }

  function test_iframe_post_redirect() {
    window.addEventListener("WebChannelMessageToContent", function(e) {
      var echoMessage = new window.CustomEvent("WebChannelMessageToChrome", {
        detail: JSON.stringify({
          id: "post_redirect",
          message: e.detail.message,
        }),
      });

      window.dispatchEvent(echoMessage);
    }, true);

    // Let the test parent know the page has loaded and is ready to echo events
    var loadedMessage = new window.CustomEvent("WebChannelMessageToChrome", {
      detail: JSON.stringify({
        id: "post_redirect",
        message: {
          command: "loaded",
        },
      }),
    });
    window.dispatchEvent(loadedMessage);
  }
</script>
</body>
</html>