title: PHPUnit Fatal error: require() when running test
body: <p>I'm new at PHPUnit and I'm having a problem when running the test.
  I noticed that the problem was that I was not including the class I supposed to test so I put the following line:</p>
  
  <pre><code>require '../../files/Cliente.php';
  </code></pre>
  
  <p>But then it gaves me the next error:</p>
  
  <pre><code>PHP Warning:  require(../../files/Cliente.php): failed to open stream: No such file or directory in /home/esperanza/Escritorio/clasificadosj-clasificados-7da0b31e6060/pruebas/files/ClienteTest.php on line 6
  
  PHP Fatal error:  require(): Failed opening required '../../files/Cliente.php' (include_path='.:/usr/share/php:/usr/share/pear') in /home/esperanza/Escritorio/clasificadosj-clasificados-7da0b31e6060/pruebas/files/ClienteTest.php on line 6
  </code></pre>
  
  <p>My directory structure is the next:</p>
  
  <pre><code>Project
      |_files
        |_Cliente.php
      |_Test
        |_ClienteTest.php
  </code></pre>
  
  <p>I don't know if I have to configure a XML document or a bootstrap first.</p>
  
  <p>Thanks a lot!</p>