public function testModel()
{
$myItem = new Item();
$myItem->setAttribute('title', 'My Coolest Item');
$myItem->getBody()->edit('sth');
$myInteraction = new ChoiceInteraction();
$myInteraction->getPrompt()->edit('Prompt you');
$myChoice1 = $myInteraction->createChoice(array('fixed' => true), 'This is correct');
$myChoice2 = $myInteraction->createChoice(array('fixed' => true), 'This is not correct');
$this->assertInstanceOf('\\oat\\taoQtiItem\\model\\qti\\choice\\SimpleChoice', $myChoice2);
$this->assertEquals(count($myInteraction->getChoices()), 2);
$myChoice1->setContent('answer #1');
$myChoice2->setContent('answer #2');
$myInteraction->removeChoice($myChoice1);
$this->assertEquals(count($myInteraction->getChoices()), 1);
$myItem->addInteraction($myInteraction, "Adding my interaction here {$myInteraction->getPlaceholder()}. And not there.");
$this->assertNotNull($myInteraction->getRelatedItem());
$this->assertEquals($myInteraction->getRelatedItem()->getSerial(), $myItem->getSerial());
$myResponse = new ResponseDeclaration();
$myItem->addResponse($myResponse);
$this->assertNotNull($myResponse->getRelatedItem());
$this->assertEquals($myResponse->getRelatedItem()->getSerial(), $myItem->getSerial());
$myItem->removeResponse($myResponse);
$responses = $myItem->getResponses();
$this->assertTrue(empty($responses));
}