File: test_reframe_image_loading.html

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<!doctype html>
<meta charset="utf-8">
<title>
  Test for bug 1395964: We don't reframe for image loading state changes.
</title>
<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<img id="content" src="support/1x1-transparent.png"></div>
<script>
SimpleTest.waitForExplicitFinish();
const utils = SpecialPowers.getDOMWindowUtils(window);

const content = document.getElementById("content");

onload = function() {
  content.offsetTop;

  const previousConstructCount = utils.framesConstructed;

  content.addEventListener("load", function() {
    content.offsetTop;
    is(previousConstructCount, utils.framesConstructed,
       "We should not have reframed");
    SimpleTest.finish();
  });

  content.src = "support/blue-100x100.png";
}
</script>