title: Testing setup for Nuxt + Vuex + Vuetify with Jest
body: <p>I spent one day solving undocumented issues regarding testing setup for Nuxt + Vuex + Vuetify with Jest.</p>
  
  <p>I had issues like:</p>
  
  <ul>
  <li><p><code>Unknown custom element: &lt;nuxt-link&gt; - When running jest unit tests</code></p></li>
  <li><p><code>Cannot read property 'register' of undefined</code></p></li>
  <li><p><code>[Vuetify] Multiple instances of Vue detected</code></p></li>
  </ul>