test_bug1729662.html

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<!DOCTYPE HTML>

<html>

<head>

  <meta charset="utf-8">

  <title>Test back/forward after pushState</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>

  <script>

    SimpleTest.waitForExplicitFinish();

    SimpleTest.requestFlakyTimeout("Need to wait to make sure an event does not fire");

    async function runTest() {

      let win = window.open();

      let goneBackAndForwardOnce = new Promise((resolve) => {

        let timeoutID;

        // We should only get one load event in win.

        let bc = new BroadcastChannel("bug1729662");

        bc.addEventListener("message", () => {

          bc.addEventListener("message", () => {

            clearTimeout(timeoutID);

            resolve(false);

});

        }, { once: true });

        let goneBack = false, goneForward = false;

        win.addEventListener("popstate", ({ state }) => {

          // We should only go back and forward once, if we get another

          // popstate after that then we should fall through to the

          // failure case below.

          if (!(goneBack && goneForward)) {

            // Check if this is the popstate for the forward (the one for

            // back will have state == undefined).

            if (state == 1) {

              ok(goneBack, "We should have gone back before going forward");

              goneForward = true;

              // Wait a bit to make sure there are no more popstate events.

              // eslint-disable-next-line mozilla/no-arbitrary-setTimeout

              timeoutID = setTimeout(resolve, 1000, true);

              return;

            // Check if we've gone back once before, if we get another

            // popstate after that then we should fall through to the

            // failure case below.

            if (!goneBack) {

              goneBack = true;

              return;

          clearTimeout(timeoutID);

          resolve(false);

});

});

      win.location = "file_bug1729662.html";

      ok(await goneBackAndForwardOnce, "Stopped navigating history");

      win.close();

      SimpleTest.finish();

  </script>

</head>

<body onload="runTest();">

<p id="display"></p>

<div id="content" style="display: none"></div>

<pre id="test"></pre>

</body>

</html>