<!DOCTYPE HTML> <html> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=1776790 --> <head> <meta charset="utf-8"> <title>Test for Bug 1776790</title> <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/> </head> <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, 1, "TestInterfaceLength.length"); }); </script> </pre> </body> </html>