test_canvas_frame_animation.html

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<!doctype html>

<title>Test for bug 1619245 - animated image as canvas background</title>

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

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

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

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

<!-- Intentionally not including SimpleTest.css as that sets the background of the root -->

<body id="body" style="background-image: url(animated-gif.gif); display: none; overflow: hidden;">

  <div id="reference" style="background-image: url(animated-gif-finalframe.gif); display: none; width: 100vw; height: 100vh;"></div>

  <div id="clean" style="display: none; width: 100vw; height: 100vh;"></div>

  <div id="debug" style="display: none"></div>

</body>

<script>

const FAILURE_TIMEOUT = 120000; // Fail early after 120 seconds (2 minutes)

window.onload = function() {

  // first move the reference outside of the <body>, so that the test can properly show it.

  document.documentElement.appendChild(document.getElementById("reference"));

  document.documentElement.appendChild(document.getElementById("debug"));

  document.documentElement.appendChild(document.getElementById("clean"));

  var animTest = new AnimationTest(20, FAILURE_TIMEOUT, 'reference', 'body', 'debug', 'clean', 'animated-gif.gif');

  animTest.beginTest();

</script>