public function testShufflingOccurs()
{
$doc = new XmlDocument();
$doc->load(self::samplesDir() . 'ims/items/2_1/choice_fixed.xml');
$session = new AssessmentItemSession($doc->getDocumentComponent());
$session->beginItemSession();
$shufflingStates = $session->getShufflingStates();
$this->assertCount(1, $shufflingStates);
$shufflingGroups = $shufflingStates[0]->getShufflingGroups();
$this->assertCount(1, $shufflingGroups);
$this->assertCount(4, $shufflingGroups[0]->getIdentifiers());
$this->assertTrue($shufflingGroups[0]->getIdentifiers()->contains('ChoiceA'));
$this->assertTrue($shufflingGroups[0]->getIdentifiers()->contains('ChoiceB'));
$this->assertTrue($shufflingGroups[0]->getIdentifiers()->contains('ChoiceC'));
$this->assertTrue($shufflingGroups[0]->getIdentifiers()->contains('ChoiceD'));
}
