/**
  * test deleting a Unit Of Measure that does not exist
  *
  * @expectedException PDOException
  **/
 public function testDeleteInvalidUnitOfMeasure()
 {
     // create a Unit Of Measure and try to delete it without actually inserting it
     $unitOfMeasure = new UnitOfMeasure(null, $this->VALID_unitCode, $this->VALID_quantity);
     $unitOfMeasure->delete($this->getPDO());
 }