ll return a singleton instance of the <code>PostsController</code>.</p>
<div class="filename javascript"><div class="ribbon"></div><span>tests/unit/controllers/posts-test.js</span><pre class="language-javascript line-numbers"><code class="javascript language-javascript"><span class="token keyword">import</span> <span class="token punctuation">{</span> module<span class="token punctuation">,</span> test <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string