public function testSetExpireTimestamp()
 {
     $time = time() + 1;
     $this->key->setExpire($time, true);
     $expire = $this->key->getExpire();
     $this->assertEquals($time, $expire);
     $this->assertTrue($this->key->isExpireTimestamp());
     $this->key->setValue(1);
     sleep(2);
     $reply = $this->key->getRediska()->get($this->key->getName());
     $this->assertNull($reply);
 }