How to check / list gem dependency before install anything?

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Hi!

Is there anyway in RubyGem to check / list / query a gem's 
dependency (or even better: all gems that will need to be 
installed, something like gem install dry run) before actually 
install anything?

Thanks!

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    ____  ____  ____  ____ (stephan paul) Arif Sahari Wibowo
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