04 35 9.69 52.73.5 13.9 17.45 20.44 27.29 10.6l37.1-37.1c59.28-59.26 59.28-155.7 0-214.96z"/>
      </svg></a> </h3>
<section aria-labelledby="toc_testing-observers">
<p>Suppose we have an object that has a property and a method observing that property.</p>
<div class="filename javascript"><div class="ribbon"></div><span>app/models/some-thing.js</span><pre class="language-javascript line-numbers"><code class="javascript language-javascript"><span class="token keyword">export</span> <span class="token keywor