/**
  * test deleting a Trail Relationship that does not exist
  **/
 public function testDeleteInvalidTrailRelationship()
 {
     // create a Trail Relationship and try to delete it without actually inserting it
     $trailRelationship = new TrailRelationship($this->segment->getSegmentId(), $this->trail->getTrailId(), $this->VALID_SEGMENTTYPE);
     $trailRelationship->delete($this->getPDO());
 }