
<!DOCTYPE HTML>
<html>
    <!--
        https://bugzilla.mozilla.org/show_bug.cgi?id=1536471
        -->
<head>
    <title>Test for Bug 1536471</title>
    <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
    <script type="application/javascript">

    let testWin;
    async function test() {
        // Open a new tab and load a document with an iframe inside
        testWin = window.open("file_bug1536471.html");
        await waitForLoad();
        var iframe = testWin.document.getElementById("staticFrame");
        is(testWin.history.length, 1, "Checking the number of session history entries when there is only one iframe");

        // Navigate the iframe to different pages
        await loadUriInFrame(iframe, "frame1.html");
        is(testWin.history.length, 2, "Checking the number of session history entries after having navigated a single iframe 1 time");
        await loadUriInFrame(iframe, "frame2.html");
        is(testWin.history.length, 3, "Checking the number of session history entries after having navigated a single iframe 2 times");
        await loadUriInFrame(iframe, "frame3.html");
        is(testWin.history.length, 4, "Checking the number of session history entries after having navigated a single iframe 3 times");

        // Reload the top document
        testWin.location.reload(true);
        await waitForLoad();
        is(testWin.history.length, 1, "Checking the number of session history entries after reloading the top document");

        testWin.close();
        SimpleTest.finish();
    }

    async function waitForLoad() {
        await new Promise(resolve => {
            window.bodyOnLoad = function() {
                setTimeout(resolve, 0);
                window.bodyOnLoad = undefined;
            };
        });
    }

    async function iframeOnload(frame) {
      return new Promise(resolve => {
        frame.addEventListener("load", () => {
            setTimeout(resolve, 0);
        }, {once: true});
      });
    }

    async function loadUriInFrame(frame, uri) {
      let onloadPromise = iframeOnload(frame);
      frame.src = uri;
      await onloadPromise;
    }
    </script>
</head>

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1536471">Mozilla Bug </a>
<p id="display"></p>
<div id="content" style="display: none">
</div>
<pre id="test">
<script type="text/javascript">
SimpleTest.waitForExplicitFinish();
</script>
</pre>
<body onload="test()">
</body>
</html>

