title: yii2 install, configure and run codeception tests
body: <p>I'm writing this because yii2 official documentation is still not complete and codeception documentation itself refer to yii2 official docs..:).</p>
  
  <p>I have some questions:</p>
  
  <ul>
  <li>In my yii2 app root there is a directory "tests/codeception", this means that codeception is already installed in my project?</li>
  <li>in vendor/yiisoft there is another codeception directory "yii2-codeception" what is it?</li>
  <li>the documentation say to create a yii2_basic_tests database and to run a migration, but migration script create only a "migration" table, is it correct?</li>
  <li>the integration with yii2 provide some web interface or I must run the tests from console scripts?</li>
  </ul>
  
  <p>Someone can explain me how to install and configure codeception in yii2 basic app step by step?</p>
  
  <p>Thank you</p>
  
  <p>Alessandro</p>