title: @dataProvider in Cest format in Codeception
body: <p>How shall I use "@dataProvider" in Cest format? (<a href="http://codeception.com/docs/05-UnitTests#Cest" rel="nofollow">http://codeception.com/docs/05-UnitTests#Cest</a>)
  For example I have this code. How to write it in Cest format</p>
  
  <pre><code>class ExampleTest extends \Codeception\TestCase\Test
  {
      /**
       * @dataProvider providerAdd
       */
      public function testAdd($a, $b, $c)
      {
          $this-&gt;assertEquals($c, ($a + $b));
      }
  
      public function providerAdd()
      {
          return array (
              array (2, 2, 4),
              array (2, 3, 5),
              array (3, 5, 8)
          );
      }
  }
  </code></pre>