/**
* Finds user by [[username]]
*
* @return User|null
*/
public function getUser()
{
if ($this->_user === false) {
$this->_user = User::findByUsername($this->username);
}
return $this->_user;
}
public function setUp()
{
parent::setUp();
Yii::$app->user->login(User::findByUsername('root'));
}