public function testBatchRemoveForSinglePrimaryKey()
 {
     $ids = [];
     for ($i = 0; $i < 3; $i++) {
         $user = new User();
         $user->username = "******";
         $user->password = "******";
         $user->save(false);
         $ids[] = $user->id;
     }
     Yii::$app->request->setBodyParams($ids);
     $this->specify('Remove a AR with single primary key', function () {
         $action = new BatchRemoveAction("batch-remove", null, ['modelClass' => 'tests\\codeception\\unit\\models\\User']);
         $n = $action->run();
         expect("Number of deleted records should be 3: ", $n)->equals(3);
     });
 }