public function testClearExpired()
{
if (!$this->_storage instanceof ClearExpiredInterface) {
$this->markTestSkipped("Storage doesn't implement ClearExpiredInterface");
}
$capabilities = $this->_storage->getCapabilities();
$ttl = $capabilities->getTtlPrecision();
$this->_options->setTtl($ttl);
$this->assertTrue($this->_storage->setItem('key1', 'value1'));
// wait until the first item expired
$wait = $ttl + $capabilities->getTtlPrecision();
usleep($wait * 2000000);
$this->assertTrue($this->_storage->setItem('key2', 'value2'));
$this->assertTrue($this->_storage->clearExpired());
if ($capabilities->getUseRequestTime()) {
$this->assertTrue($this->_storage->hasItem('key1'));
} else {
$this->assertFalse($this->_storage->hasItem('key1', array('ttl' => 0)));
}
$this->assertTrue($this->_storage->hasItem('key2'));
}