test_navigate_after_pagehide.html

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<!doctype html>

<html>

  <head>

    <title>Test for navigation attempts by scripts in inactive inner window</title>

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

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

  </head>

<body>

<iframe src="dummy_page.html" id="iframe"></iframe>

<script>

"use strict";

add_task(async function() {

  let iframe = document.getElementById("iframe");

  let navigate = iframe.contentWindow.eval(`(function() {

    location.href = "/";

  })`);

  // eslint-disable-next-line @microsoft/sdl/no-insecure-url

  iframe.src = "http://example.com/";

  await new Promise(resolve =>

    iframe.addEventListener("load", resolve, { once: true })

);

  // This should do nothing. But, importantly, it should especially not crash.

  navigate();

  ok(true, "We didn't crash");

});

</script>

</body>

</html>