[rspec-users] Can you explain this code to me?

[David Chelimsky]

On Feb 7, 2008 5:26 PM, Pito Salas <rps at salas.com> wrote:
> I am experimenting with the restful-authentication plug in and I see
> that it has generated an rspec encantation which I had not seen
> before:
>
>   it 'allows signup' do
>     lambda do
>       create_user
>       response.should be_redirect
>     end.should change(User, :count).by(1)
>   end
>
> What does the combination of a lambda and a .should mean?

This should answer your question:

http://rspec.info/rdoc/classes/Spec/Matchers.html#M000386

HTH,
David

>
> Similarly but a little different:
>
>   describe 'being created' do
>     before do
>       @user = nil
>       @creating_user = lambda do
>         @user = create_user
>         violated "#{@user.errors.full_messages.to_sentence}" if
> @user.new_record?
>       end
>     end
>
>     it 'increments User#count' do
>       @creating_user.should change(User, :count).by(1)
>     end
>   end
>
> Thanks for any pointers or clarifications!
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