From: Codeblogger <codeblogger@...>
Date: 2006-06-06T21:30:56+09:00
Subject: Re: Ruby and the Open-Closed Principle

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> The problem is that once you add behavior, it is existing, and someone
> else might therefore change it.  In other words, you might end up with
> two versions of a method with the same name.


That's why you want to write tests.

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