public function testDeleteRelatedMetaWhenRemovesAUser()
 {
     $user = Factory::create('User', ['id' => 1]);
     Factory::times(2)->create('PostMeta', ['meta_key' => 'pal_user_id', 'meta_value' => 1]);
     $metaBeforeDelete = $user->meta;
     $user->delete();
     $metaAfterDelete = PostMeta::where('meta_key', '=', 'pal_user_id')->where('meta_value', '=', $user->id)->get();
     assertThat($metaBeforeDelete, is(nonEmptyTraversable()));
     assertThat($metaAfterDelete, is(emptyTraversable()));
 }
 public function testDeleteRelatedMetaModelsWhenRemovesAGallery()
 {
     $gallery = Factory::create('Gallery');
     Factory::create('PostMeta', ['post_id' => 1]);
     $metaBeforeDelete = $gallery->meta;
     $gallery->delete();
     $metaAfterDelete = PostMeta::where('post_id', '=', 1)->get();
     assertThat($metaBeforeDelete, is(nonEmptyTraversable()));
     assertThat($metaAfterDelete, is(emptyTraversable()));
 }