test_bug1295852.html

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<!DOCTYPE html>

<meta charset=utf-8>

<title>Bug 1295852</title>

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

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

<body>

<script>

var names = [

  "span", "_moz_generated_content_before", "_moz_generated_content_after"

];

names.forEach(name => {

  var element = document.createElement(name);

  element.animate({ "color": ["red", "blue"] }, { duration: 1000 });

  is(element.getAnimations().length, 1);

});

</script>