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Test for required attributes

/ Published in: Ruby
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A fairly DRY way to test for required attributes of a model. It's sort of an alternative to fixtures. It breaks the one-assertion-per-test rule that some people favor. Drop in your unit test and edit as necessary.

A better (yet not quite perfect) approach:
http://johnwilger.com/articles/2005/12/07/a-bit-of-dryness-for-unit-tests-in-rails

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  1. def test_required_attributes
  2.     required_atts = [:first_name, :last_name, :credentials, :title1, 
  3.                      :department, :organization, :street, :city, :state, :zip, 
  4.                      :phone, :email]
  5.     required_atts.each do |att|
  6.       r = create_registrant(att => nil)
  7.       assert r.errors.on(att)
  8.     end
  9.   end
  10.  
  11.   private
  12.  
  13.   def create_registrant(options = {})
  14.     Registrant.create({:meeting_id => 1, 
  15.                        :first_name => \"John\", 
  16.                        :middle_name => \"Q\", 
  17.                        :last_name => \"Doe\", 
  18.                        :credentials => \"PhD\", 
  19.                        :title1 => \"Doc\", 
  20.                        :title2 => \"\", 
  21.                        :title3 => \"\", 
  22.                        :department => \"Cardiology\", 
  23.                        :organization => \"DUHS\", 
  24.                        :street => \"12 Erwin Road\", 
  25.                        :city => \"Durham\", 
  26.                        :state => \"NC\", 
  27.                        :zip => \"27707\", 
  28.                        :phone => \"919-490-1000\", 
  29.                        :fax => \"919-490-1001\", 
  30.                        :email => \"[email protected]\"}.merge(options))
  31.   end

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