/**
  * @covers SQLBuilder::__toString
  * @covers SQLBuilder::tablesToString
  */
 public function test__toString()
 {
     $this->sql->select('users', 'u', array('id', 'username', 'email'));
     $this->sql->groupBy('id');
     $this->sql->orderBy('email');
     $this->sql->setLimit(10);
     $this->sql->setPredicate("predicat");
     $actual = $this->sql->__toString();
     $excepted = "select predicat u.id u_id,u.username u_username,u.email u_email from users u group by id order by email limit 10";
     $this->assertSame($excepted, $actual);
 }