test_interfaceLength.html

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<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=1776790

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<head>

  <meta charset="utf-8">

  <title>Test for Bug 1776790</title>

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

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

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<body>

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1776790">Mozilla Bug 1776790</a>

<p id="display"></p>

<div id="content" style="display: none">

</div>

<pre id="test">

<script type="application/javascript">

/* global TestInterfaceLength */

add_task(async function init() {

  await SpecialPowers.pushPrefEnv({set: [["dom.expose_test_interfaces", true]]});

});

/** Test for Bug 1776790 **/

add_task(function test_interface_length() {

  is(TestInterfaceLength.length, 0, "TestInterfaceLength.length");

});

</script>

</pre>

</body>

</html>