NilIO 
NilIO emulates a null device
Install
gem install nilio
Use
Make sure you got it:
>> require "nilio"
=> true
Create a NilIO:
>> null_device = NilIO.instance
=> #<NilIO: ... >
Write to it:
>> null_device.write("It's so nil")
=> 11
Read from it:
>> null_device.read(1)
=>
It's always EOF:
>> null_device.eof?
=> true