public function testSeekComponent()
{
$doc = new XmlCompactDocument();
$doc->load(self::samplesDir() . 'custom/runtime/itemsubset.xml');
$seeker = new AssessmentTestSeeker($doc->getDocumentComponent(), array('assessmentItemRef', 'assessmentSection'));
$ref = $seeker->seekComponent('assessmentItemRef', 0);
$this->assertEquals('Q01', $ref->getIdentifier());
$ref = $seeker->seekComponent('assessmentItemRef', 3);
$this->assertEquals('Q04', $ref->getIdentifier());
$sec = $seeker->seekComponent('assessmentSection', 0);
$this->assertEquals('S01', $sec->getIdentifier());
$ref = $seeker->seekComponent('assessmentItemRef', 6);
$this->assertEquals('Q07', $ref->getIdentifier());
$sec = $seeker->seekComponent('assessmentSection', 2);
$this->assertEquals('S03', $sec->getIdentifier());
// Should not be found.
try {
$ref = $seeker->seekComponent('responseProcessing', 25);
$this->assertFalse(true, "The 'responseProcessing' QTI class is not registered with the AssessmentTestSeeker object.");
} catch (OutOfBoundsException $e) {
$this->assertTrue(true);
}
try {
$ref = $seeker->seekComponent('assessmentItemRef', 100);
$this->assertFalse(true, "Nothing should be found for 'assessmentItemRef' at position '100'. This is out of bounds.");
} catch (OutOfBoundsException $e) {
$this->assertTrue(true);
}
}
/**
* Read a PendingResponse object from the current binary stream.
*
* @param AssessmentTestSeeker $seeker An AssessmentTestSeeker object in order to know tree position for involved QTI Components.
* @return PendingResponses A PendingResponses object.
* @throws QtiBinaryStreamAccessException
*/
public function readPendingResponses(AssessmentTestSeeker $seeker)
{
try {
// Read the state.
$state = new State();
$varCount = $this->readTinyInt();
for ($i = 0; $i < $varCount; $i++) {
$responseDeclaration = $seeker->seekComponent('responseDeclaration', $this->readShort());
$responseVariable = ResponseVariable::createFromDataModel($responseDeclaration);
$this->readVariableValue($responseVariable);
$state->setVariable($responseVariable);
}
// Read the assessmentItemRef.
$itemRef = $seeker->seekComponent('assessmentItemRef', $this->readShort());
// Read the occurence number.
$occurence = $this->readTinyInt();
return new PendingResponses($state, $itemRef, $occurence);
} catch (BinaryStreamAccessException $e) {
$msg = "An error occured while reading some pending responses.";
throw new QtiBinaryStreamAccessException($msg, $this, QtiBinaryStreamAccessException::PENDING_RESPONSES, $e);
} catch (OutOfBoundsException $e) {
$msg = "A QTI component was not found in the assessmentTest tree structure.";
throw new QtiBinaryStreamAccessException($msg, $this, QtiBinaryStreamAccessException::PENDING_RESPONSES, $e);
}
}
