test_aboutblank_change_process.html

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<!DOCTYPE html>

<head>

  <meta charset="utf-8">

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

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

</head>

<script>

// Open a window and navigate it from https://example.com to about:blank

// With fission, we should switch processes and about:blank should load in

// the same process as this test page.

// This is a crash test.

add_task(async function test_aboutblank_change_process() {

  let exampleLoaded = new Promise(resolve => {

    function onMessage(event) {

      if (event.data == "body-loaded") {

        window.removeEventListener("message", onMessage);

        resolve();

    window.addEventListener("message", onMessage);

});

  let win = window.open();

  win.location = "https://example.com/tests/docshell/test/navigation/file_tell_opener.html";

  await exampleLoaded;

  win.location = "about:blank";

  // A crash happens somewhere here when about:blank does not go via

  // DocumentChannel with fission enabled

  // Wait for about:blank to load in this process

  await SimpleTest.promiseWaitForCondition(() => {

    try {

      return win.location.href == "about:blank";

    } catch (e) {

      // While the `win` still has example.com page loaded, `win.location` will

      // be a cross origin object and querying win.location.href will throw a

      // SecurityError. Return false as long as this is the case.

      return false;

})

  ok(true, "We did not crash");

  win.close();

});

</script>