How to use ensure_inclusion_of for an arbitrary list

Question

In my rails project I have a model with attribute foo. I have a vaildation which ensures that any value for foo is in an array. This uses a validation with the :in option.

I want to test this using rspec/shoulda. I think ensure_inclusion_of is supposed to test this validation but it only works on ranges and not an array. How can I make it work with an array or write my own matcher to do this?

score 4 · Accepted Answer · answered Apr 04 '11 at 12:38

4

ensure_inclusion_of is for checking whether Modules are included in the current class.

If you wish to test validates_inclusion_of you can either write RSpecs for this yourself, or install the Shoulda and use it's macros.

Here I validate the gender field on a user model.

describe User do

  it { should validate_presence_of(:gender) }
  it { should allow_value("male").for(:gender) }
  it { should allow_value("female").for(:gender) }
  it { should_not allow_value("other").for(:gender) }

end

answered Apr 04 '11 at 12:38

Douglas F Shearer

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I was referring to this matcher: http://rubydoc.info/github/thoughtbot/shoulda-matchers/master/Shoulda/Matchers/ActiveRecord:ensure_inclusion_of However your solution seems adequate for my needs. – Zameer Manji Apr 04 '11 at 20:06
Ah, I see. Glad to have helped. – Douglas F Shearer Apr 04 '11 at 20:25

score 3 · Answer 2 · answered Oct 04 '12 at 15:31

3

You can now write it like this:

it { should ensure_inclusion_of(:gender).in_array(%w(male female)) }

answered Oct 04 '12 at 15:31

PhilT

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How to use ensure_inclusion_of for an arbitrary list

2 Answers2