/**
  * test inserting a Trail Relationship, editing it, and then updating it
  *
  * grabs the data from mySQL via getTrailRelationshipBySegmentIdAndTrailId
  **/
 public function testUpdateValidTrailRelationshipBySegmentIdAndTrailId()
 {
     // count the number of rows and save it for later
     $numRows = $this->getConnection()->getRowCount("trailRelationship");
     //create a new Trail Relationship and insert it into mySQL
     $trailRelationship = new TrailRelationship($this->segment->getSegmentId(), $this->trail->getTrailId(), $this->VALID_SEGMENTTYPE);
     $trailRelationship->insert($this->getPDO());
     // edit the Trail Relationship and update it in mySQL
     $trailRelationship->setSegmentType($this->VALID_SEGMENTTYPE2);
     $trailRelationship->update($this->getPDO());
     // grab the data from mySQL and enforce the fields match our expectations
     $pdoTrailRelationship = TrailRelationship::getTrailRelationshipBySegmentIdAndTrailId($this->getPDO(), $trailRelationship->getSegmentId(), $trailRelationship->getTrailId());
     $this->assertSame($numRows + 1, $this->getConnection()->getRowCount("trailRelationship"));
     $this->assertSame($pdoTrailRelationship->getSegmentId(), $this->segment->getSegmentId());
     $this->assertSame($pdoTrailRelationship->getTrailId(), $this->trail->getTrailId());
     $this->assertSame($pdoTrailRelationship->getSegmentType(), $this->VALID_SEGMENTTYPE2);
 }