<!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>
