Mutation testing with Mutant

Posted by on January 23, 2013 23 comments

When working on DataMapper and its libraries we put a lot of effort into testing. Our libraries must have 100% code coverage and even that is not enough. What we want to achieve eventually is full mutation coverage. What is …

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DataMapper 2 Status and Roadmap

Posted by on December 20, 2012 20 comments

UPDATE: DataMapper 2 was renamed to Ruby Object Mapper (ROM). For more info check out rom-rb.org We’ve been really busy working on the mapper part of DataMapper 2 for the last few months. This gives us more clarity about what …

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Subclassing Module For Fun and Profit

Posted by on August 13, 2012 8 comments

You think you’ve done everything with Ruby? How about subclassing Module? It’s an interesting technique that I’ve been experimenting with lately. One of the downsides of using modules in Ruby is that a module doesn’t have a state. When you …

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Single Responsibility Principle on Rails Explained

Posted by on July 9, 2012 14 comments

A few weeks back we had a small drama about SRP. There were some smart comments, some stupid ones and a few funny jokes even, like that for example: When the SRP Police comes to take me, I’ll hide behind …

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Get Rid of That Code Smell – Primitive Obsession

Posted by on June 25, 2012 13 comments

This is a post from the Get Rid of That Code Smell series. Primitive Obsession is another popular code smell in Ruby land. It’s very easy, tempting and just feels convenient to use primitive objects to represent various concepts in …

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Part of DataMapper 2 Is Done – Announcing Virtus 0.5.0

Posted by on June 10, 2012 10 comments

UPDATE: DataMapper 2 was renamed to Ruby Object Mapper (ROM). For more info check out rom-rb.org I’m happy to announce that Virtus 0.5.0 was released. It’s sort of a milestone for me as Virtus is now considered feature-complete and I’m …

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Get Rid of That Code Smell – Duplication

Posted by on May 11, 2012 3 comments

This is a post from the Get Rid of That Code Smell series. Removing duplication from the code is a seemingly easy task. In many cases it is pretty straight-forward – you look at similar bits of code and you …

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Get Rid of That Code Smell – Control Couple

Posted by on April 11, 2012 19 comments

This is a post from the Get Rid of That Code Smell series. If you are serious about Object Oriented Design and respecting Single Responsibility Principle then you definitely want to get rid of Control Couple code smells. In this …

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