/**
* Returns a Cache Item representing the specified key.
*
* This method must always return a CacheItemInterface object, even in case of
* a cache miss. It MUST NOT return null.
*
* @param string $key
* The key for which to return the corresponding Cache Item.
*
* @throws InvalidArgumentException
* If the $key string is not a legal value a \Psr\Cache\InvalidArgumentException
* MUST be thrown.
*
* @return CacheItemInterface
* The corresponding Cache Item.
*/
public function getItem($key)
{
Utility::validateKey($key);
if (isset($this->_queue[$key])) {
return $this->_queue[$key];
}
$value = null;
$isHit = $this->_cache->isExisting($key);
if ($isHit) {
$value = $this->_cache->get($key);
if ($value instanceof NullObject) {
$value = null;
}
}
$item = new CacheItem();
$item->setKey($key);
$item->set($value);
$item->setIsHit($isHit);
return $item;
}
public function testSettingInvalidExpirationTime()
{
$this->expectException(InvalidArgumentException::class);
$item = new CacheItem();
$item->expiresAfter('one minute');
}