re the URL has been visited
and that's the only behaviour that has transpired. If we didn't use this mode,
our assertions would most likely be executed before the async behaviour had taken place, so our assertion results would be unpredictable.</p>
</section>
<h3 id="toc_the-resolver">The Resolver <a href="#toc_the-resolver"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
        <path d="M326.61 185.4c59.75 59.8 58.93 155.69.36 214.58-.1.12-.24.25-.36.37l-67.2 67.2c-59.27 59.27-155.7 59.26-2