public function save(UnitTester $I)
{
$I->wantTo('Save data by using APC(u) as cache backend');
$key = '_PHCA' . 'data-save';
$data = [uniqid(), gethostname(), microtime(), get_include_path(), time()];
$cache = new Apc(new Data(['lifetime' => 20]));
$I->dontSeeInApc($key);
$cache->save('data-save', $data);
$I->seeInApc($key, serialize($data));
$data = 'sure, nothing interesting';
$I->dontSeeInApc('non-existent-key', serialize($data));
$cache->save('data-save', $data);
$I->seeInApc($key, serialize($data));
}