helper_fission_empty.html

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<!DOCTYPE html>

<html id="fission_empty_docelement">

 <meta charset="utf-8">

 <style>

 html,body {

   /* Convenient for calculation of element positions */

   margin: 0;

   padding: 0;

 </style>

 <script src="apz_test_utils.js"></script>

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

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

 <script>

// This is an empty document that serves as a OOPIF content document that be

// reused by different fission subtests. The subtest can eval stuff in this

// document using the sendToOopif helper and thereby populate this document

// with whatever is needed. This allows the subtest to more "contained" in a

// single file and avoids having to create new dummy files for each subtest.

async function loaded() {

  window.dispatchEvent(new Event("FissionTestHelper:Init"));

  // Wait a couple of animation frames before sending the load, to ensure that

  // this OOPIF's layer tree has been sent to the compositor. We use this

  // instead of things like promiseOnlyApzControllerFlushed and/or promiseAllPaintsDone because

  // this page is running without SpecialPowers and I couldn't figure out a good

  // way to get a hold of a things like Services.obs or DOMWindowUtils easily.

  await promiseFrame();

  await promiseFrame();

  FissionTestHelper.fireEventInEmbedder("OOPIF:Load", {content: window.location.href});

 </script>

 <body onload="loaded()">

 </body>

</html>