title: How to send a mutation on testing in Laravel using (Lighthouse package)
body: <p>on this <a href="https://medium.com/@olivernybroe/testing-graphql-with-laravel-4d6201b40f68" rel="nofollow noreferrer">post</a> the author made an example helper like this 
  and the package being used is the <a href="https://lighthouse-php.netlify.com" rel="nofollow noreferrer">Lighthouse</a></p>
  
  <pre><code>public function graphql(string $query)
  {
      return $this-&gt;post('/graphql', [
        'query' =&gt; $query
      ]);
  }
  </code></pre>
  
  <p>and so can be used it like this:</p>
  
  <pre><code>$response = $this-&gt;graphql("{articles(first: 10) { edges { node { title } } } }");
  </code></pre>
  
  <p>but can I implement that on mutation? if example I have a mutation: </p>
  
  <pre><code>type Mutation {
     sampleMutation(
        id: ID!
     )
  }
  </code></pre>
  
  <p>I'm not sure how to do that on a mutation.</p>