public function itCallsTheVisitorForEachChangesetValue()
 {
     expect($this->visitor)->export()->count(2);
     expect($this->visitor)->export($this->artifact_xml, $this->changeset_xml, $this->artifact, $this->int_changeset_value)->at(0);
     expect($this->visitor)->export($this->artifact_xml, $this->changeset_xml, $this->artifact, $this->float_changeset_value)->at(1);
     $this->values_exporter->exportSnapshot($this->artifact_xml, $this->changeset_xml, $this->artifact, $this->values);
 }
 public function exportWithoutComments(SimpleXMLElement $artifact_xml, Tracker_Artifact_Changeset $changeset)
 {
     $changeset_xml = $artifact_xml->addChild('changeset');
     $submitted_by = $changeset_xml->addChild('submitted_by', $changeset->getSubmittedBy());
     $submitted_by->addAttribute('format', 'id');
     $submitted_on = $changeset_xml->addChild('submitted_on', date('c', $changeset->getSubmittedOn()));
     $submitted_on->addAttribute('format', 'ISO8601');
     $this->values_exporter->exportSnapshot($artifact_xml, $changeset_xml, $changeset->getArtifact(), $changeset->getValues());
 }