public function testMultipleOccurences()
{
$doc = new XmlCompactDocument();
$doc->load(self::samplesDir() . 'custom/runtime/scenario_basic_nonadaptive_linear_singlesection_withreplacement.xml');
$sessionManager = new SessionManager();
$session = $sessionManager->createAssessmentTestSession($doc->getDocumentComponent());
$variableExpr = $this->createComponentFromXml('<variable identifier="Q01.SCORE"/>');
$occurenceVariableExpression = $this->createComponentFromXml('<variable identifier="Q01.1.SCORE"/>');
$variableProcessor = new VariableProcessor($variableExpr);
$variableProcessor->setState($session);
// non begun test session.
$this->assertSame(null, $variableProcessor->process());
$variableProcessor->setExpression($occurenceVariableExpression);
$this->assertSame(null, $variableProcessor->process());
// begun test session.
$variableProcessor->setExpression($variableExpr);
$session->beginTestSession();
// Why not 0.0? Because when using a non sequenced variable identifier
// for an item with multiple occurence, the very last instance submitted becomes
// the item where the values will be pulled out. No instances were submitted yet
// and NULL is returned.
$this->assertSame(null, $variableProcessor->process());
$variableProcessor->setExpression($occurenceVariableExpression);
// Why not NULL? Because we are in a linear test and Q01 is eligible for selection.
// The item session is then instantiated. Outcome variables are set to their default
// when the item session instantiation occurs.
$this->assertSame(0.0, $variableProcessor->process()->getValue());
// Q01.1
$session->beginAttempt();
$session->endAttempt(new State(array(new ResponseVariable('RESPONSE', Cardinality::SINGLE, BaseType::IDENTIFIER, new Identifier('ChoiceA')))));
$variableProcessor->setExpression($variableExpr);
$result = $variableProcessor->process();
// Null because submission mode is individual...
$this->assertSame(null, $result);
$variableProcessor->setExpression($occurenceVariableExpression);
$result = $variableProcessor->process();
$this->assertInstanceOf('qtism\\common\\datatypes\\Float', $result);
$this->assertEquals(1.0, $result->getValue());
$session->moveNext();
// Q01.2
$session->beginAttempt();
$session->endAttempt(new State(array(new ResponseVariable('RESPONSE', Cardinality::SINGLE, BaseType::IDENTIFIER, new Identifier('ChoiceB')))));
$variableProcessor->setExpression($variableExpr);
$result = $variableProcessor->process();
$this->assertSame(null, $result);
// $occurenceVariableExpression still targets Q01.1
$variableProcessor->setExpression($occurenceVariableExpression);
$result = $variableProcessor->process();
$this->assertInstanceOf('qtism\\common\\datatypes\\Float', $result);
$this->assertEquals(1.0, $result->getValue());
// $occurenceVariableExpression now targets Q01.2
$occurenceVariableExpression->setIdentifier('Q01.2.SCORE');
$result = $variableProcessor->process();
$this->assertInstanceOf('qtism\\common\\datatypes\\Float', $result);
$this->assertEquals(0.0, $result->getValue());
}
public function testMultipleOccurences()
{
$doc = new XmlCompactDocument();
$doc->load(self::samplesDir() . 'custom/runtime/scenario_basic_nonadaptive_linear_singlesection_withreplacement.xml');
$sessionManager = new SessionManager();
$session = $sessionManager->createAssessmentTestSession($doc->getDocumentComponent());
$variableExpr = $this->createComponentFromXml('<variable identifier="Q01.SCORE"/>');
$occurenceVariableExpression = $this->createComponentFromXml('<variable identifier="Q01.1.SCORE"/>');
$variableProcessor = new VariableProcessor($variableExpr);
$variableProcessor->setState($session);
// non begun test session.
$this->assertSame(null, $variableProcessor->process());
$variableProcessor->setExpression($occurenceVariableExpression);
$this->assertSame(null, $variableProcessor->process());
// begun test session.
$variableProcessor->setExpression($variableExpr);
$session->beginTestSession();
// Why not 0.0? Because we are in individual mode.
$variableProcessor->setExpression($occurenceVariableExpression);
// Why not NULL? Because we are in a linear test and Q01 is eligible for selection.
// The item session is then instantiated. Outcome variables are set to their default
// when the item session instantiation occurs.
$this->assertSame(0.0, $variableProcessor->process()->getValue());
// Q01.1
$session->beginAttempt();
$session->endAttempt(new State(array(new ResponseVariable('RESPONSE', Cardinality::SINGLE, BaseType::IDENTIFIER, new QtiIdentifier('ChoiceA')))));
$variableProcessor->setExpression($variableExpr);
$result = $variableProcessor->process();
// Null because submission mode is individual...
// From IMS QTI:
// The value of an item variable taken from an item instantiated multiple times from the same
// assessmentItemRef (through the use of selection withReplacement) is taken from the last instance
// submitted if submission is simultaneous, otherwise it is undefined.
$this->assertSame(null, $result);
$variableProcessor->setExpression($occurenceVariableExpression);
$result = $variableProcessor->process();
$this->assertInstanceOf('qtism\\common\\datatypes\\QtiFloat', $result);
$this->assertEquals(1.0, $result->getValue());
$session->moveNext();
// Q01.2
$session->beginAttempt();
$session->endAttempt(new State(array(new ResponseVariable('RESPONSE', Cardinality::SINGLE, BaseType::IDENTIFIER, new QtiIdentifier('ChoiceB')))));
$variableProcessor->setExpression($variableExpr);
$result = $variableProcessor->process();
$this->assertSame(null, $result);
// $occurenceVariableExpression still targets Q01.1
$variableProcessor->setExpression($occurenceVariableExpression);
$result = $variableProcessor->process();
$this->assertInstanceOf('qtism\\common\\datatypes\\QtiFloat', $result);
$this->assertEquals(1.0, $result->getValue());
// $occurenceVariableExpression now targets Q01.2
$occurenceVariableExpression->setIdentifier('Q01.2.SCORE');
$result = $variableProcessor->process();
$this->assertInstanceOf('qtism\\common\\datatypes\\QtiFloat', $result);
$this->assertEquals(0.0, $result->getValue());
}
