What's the point of some of shoulda's macros?

Posted by ryeguy on Stack Overflow See other posts from Stack Overflow or by ryeguy
Published on 2010-03-29T15:49:24Z Indexed on 2010/03/29 16:13 UTC
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ruby

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TDD

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unit-testing

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shoulda

I think shoulda is really neat, but what I don't understand is why some of the macros exist, such as:

should_validate_uniqueness_of :title
should_validate_presence_of :body, :message => /wtf/
should_validate_presence_of :title
should_validate_numericality_of :user_id

I'm relatively new to testing, but what purpose do these serve? They're almost an exact mirror of the same validations that happen in the model. For example, what exactly do you accomplish by going into your model and writing validates_uniqueness_of :title and then writing a test that says should_validate_uniqueness_of :title?

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