title: Run a single test with phpUnit
body: <p>I'm currently introducing tests in my Symfony app. Some of them are failing and it takes ages to run them all.</p>
  
  <p>Is it possible to run a single test with the simpl-phpunit command ? </p>
  
  <h2>I already tested :</h2>
  
  <p>with the namespace of my test but ended up with </p>
  
  <pre><code>./vendor/bin/simple-phpunit App\tests\Controller\DefaultControllerTest
  </code></pre>
  
  <blockquote>
    <p>Cannot open file "ApptestsControllerDefaultControllerTest.php".</p>
  </blockquote>
  
  <p>and with the relative path to my Test, ut it leads to:</p>
  
  <pre><code>./vendor/bin/simple-phpunit tests/Controller/DefaultControllerTest
  </code></pre>
  
  <blockquote>
    <p>Cannot open file "tests/Controller/DefaultControllerTest.php".</p>
  </blockquote>