Give Null a meaningful inspect method

[nilbus]

Hi Marcin,

First - thanks for throwing this gem together. Having this gem makes it a lot easier to put the ideas from Avdi's talk and the Null Object pattern into practice.

I added the inspect method to make debugging better. Inspecting an object and seeing nothing at all makes it very unclear what's going on, especially to other developers who aren't familiar with the how Null objects act.

1.9.3p125 :001 > require './lib/nullobject'
 => true
1.9.3p125 :002 > Null::Object.instance
 => #<Null::Object:0x8089d624>

This is also consistent with Avdi's slides.
http://avdi.org/talks/confident-code-rubymidwest-2011/confident-code.html#slide41

[nilbus]

Any thoughts on this?

[pcreux]

👍

[martinciu]

@nilbus apologize about delay. It's merged and new version of the released. Thanks!

[nilbus]

Thanks! :-)