public function testDecrement()
{
$time = strtotime('+1 minute');
$key = 'decrement';
$value = 10;
$result = $this->_conn->set($key, $value, $time);
$this->assertTrue($result);
$result = $this->memcache->decrement($key);
$this->assertEqual($value - 1, $result);
$result = $this->_conn->get($key);
$this->assertEqual($value - 1, $result);
$result = $this->_conn->delete($key);
$this->assertTrue($result);
}