public function testFilteringCollectionsReturnedByRelationships()
{
$spiderman = Hero::createHelper('Spider Man', 'Peter Parker', array('Super-human Strength', 'Spider Senses'));
$superman = Hero::createHelper('Super Man', 'Clark Kent', array('Super-human Strength', 'Invulnerability'));
$batman = Hero::createHelper('Batman', 'Bruce Wayne', array('Richness', 'Super-human Intellect'));
$this->assertCount(2, $spiderman->Powers);
$this->assertCount(1, $spiderman->Powers->filter('description LIKE ?', 'Super-human%')->toArray());
}