public void TestHExists()
 {
     using (var mock = new FakeRedisSocket(":1\r\n"))
         using (var redis = new PoolRedisClient(mock, new DnsEndPoint("fakehost", 9999)))
         {
             Assert.True(redis.HExists("test", "field"));
             Assert.Equal("*3\r\n$7\r\nHEXISTS\r\n$4\r\ntest\r\n$5\r\nfield\r\n", mock.GetMessage());
         }
 }