[gem] does "disconnect!" work properly?

[Satoshi Yamada]

hi,
I wonder if disconnect! method works properly in gem cassandrabecause the code 
below does not cause exception.
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client = Cassandra.new('pool', host_ip)
ret = client.get(:db, 'test', key, option_one)p retclient.disconnect!
ret = client.get(:db, 'test', key, option_one)p ret
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I use gem cassandra 0.14.0http://rubygems.org/gems/cassandra/versions/0.14.0
thanks in advance,satoshi