public function testShouldGetKeys()
{
$cache = $this->getAdapter(null);
$this->assertEquals(0, count($cache->queryKeys()));
$cache->save('a', 1, 10);
$cache->save('long-key', 'long-val', 10);
$cache->save('bcd', 3, 10);
$this->keys[] = 'a';
$this->keys[] = 'long-key';
$this->keys[] = 'bcd';
$keys = $cache->queryKeys();
sort($keys);
$this->assertEquals(['a', 'bcd', 'long-key'], $keys);
$this->assertEquals(['long-key'], $cache->queryKeys('long'));
}