public function testWriteShufflingState()
{
$shufflingGroup = new ShufflingGroup(new IdentifierCollection(array('id1', 'id2', 'id3')));
$shufflingGroup->setFixedIdentifiers(new IdentifierCollection(array('id2')));
$shufflingGroups = new ShufflingGroupCollection(array($shufflingGroup));
$shuffling = new Shuffling('RESPONSE', $shufflingGroups);
$stream = new MemoryStream();
$stream->open();
$access = new QtiBinaryStreamAccessFsFile($stream);
$access->writeShufflingState($shuffling);
$stream->rewind();
$shufflingState = $access->readShufflingState();
$this->assertEquals('RESPONSE', $shufflingState->getResponseIdentifier());
$shufflingGroups = $shufflingState->getShufflingGroups();
$this->assertEquals(array('id1', 'id2', 'id3'), $shufflingGroups[0]->getIdentifiers()->getArrayCopy());
$this->assertEquals(array('id2'), $shufflingGroups[0]->getFixedIdentifiers()->getArrayCopy());
}
