public function test_PUnsubscribe()
{
$this->assertEquals('punsubscribe', $this->redis->PUnsubscribe());
$this->assertEquals('punsubscribe p', $this->redis->PUnsubscribe(array('p')));
$this->assertEquals('punsubscribe p1 p2', $this->redis->PUnsubscribe(array('p1', 'p2')));
}