public function itIsPossibleToSetAndCheckExistenceInCache()
{
$backend = $this->setUpBackend();
$data = 'Some data';
$identifier = 'MyIdentifier' . md5(uniqid(mt_rand(), true));
$backend->set($identifier, $data);
$inCache = $backend->has($identifier);
$this->assertTrue($inCache, 'APC backend failed to set and check entry');
}