Rails - Jul 2011 - Shoulda, RSpec, shoulda-matchers and models validations unit testing

I was trying out RSpec framework in a project and got stopped doing the unit
test of a model. In particular, doing the test for the associations and the
ActiveRecord validations.
I started writing the validations but my tests didn''t look DRY at all.
Before refactoring the tests checked out and look for other people
solutions.
I found out shoulda-matchers and Shoulda (which is I didn''t get it
wrong is
another testing framework). Actually I found another one, remarkable, but it
look it doesn''t work with Rails 3.

Does anyone have any advice, comments, suggestion on this matter?

Right now I continue on using RSpec and shoulda-matchers. The last one
mainly for testing the validations and associations of the models.
Any advice and/or help will be appreciated.

Thanks in advance.

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You can start reading at section 6.2, and see how the Rails 3 Tutorial 
tests validations:

http://ruby.railstutorial.org/chapters/modeling-and-viewing-users-one#sec:user_model

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Already got something like that. The main difference, is that I''m using
factories.
The problem with my test, which almost follow those examples, is that
I''m
repeating myself each time I want to validate the same (uniqueness, length,
etc).
One option is to create methods for each type of validation and that way the
test will be DRY. Instead of that I was looking if there is a gem that
provide me with those (keep them updated, etc).
At that point is when I found shoulda-matchers.

Otherwise this is an example of how the test looks

class User < ActiveRecord::Base
...
  validates :first_name,
    :presence => true,
    :length => { :maximum => 32 }
  validates :last_name,
    :presence => true,
    :length => { :maximum => 32 }
...
end

According to the examples your tests for those fields should been:

describe User do

  before(:each) do
    @attr = { :first_name => "Foo", :last_name =>
"Bar" }
  end
...
  it "should require a first name" do
    no_email_user = User.new(@attr.merge(:first_name => ""))
    no_email_user.should_not be_valid
  end

  it "should require a last name" do
    no_email_user = User.new(@attr.merge(:last_name => ""))
    no_email_user.should_not be_valid
  end

  it "should reject first names that are too long" do
    long_first_name = "a" * 33
    long_first_name_user = User.new(@attr.merge(:first_name =>
long_first_name))
    long_first_name_user.should_not be_valid
  end

  it "should reject last names that are too long" do
    long_last_name = "a" * 33
    long_last_name_user = User.new(@attr.merge(:last_name =>
long_last_name))
    long_last_name_user.should_not be_valid
  end
end

On Tue, Jul 26, 2011 at 9:55 PM, 7stud --
<lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:
> You can start reading at section 6.2, and see how the Rails 3 Tutorial
> tests validations:
>
>
>
http://ruby.railstutorial.org/chapters/modeling-and-viewing-users-one#sec:user_model
>
> --
> Posted via http://www.ruby-forum.com/.
>
> --
> You received this message because you are subscribed to the Google Groups
> "Ruby on Rails: Talk" group.
> To post to this group, send email to
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>
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>
>
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