ruby - Rails RSpec Test Does not Pass Correctly -

i'm writing model tests rspec cookbook model. each user has_many cookbooks, , each cookbook belongs_to user. make sure cookbook not created without user, wrote following test:

it "is invalid without user"   expect(factorygirl.build(:cookbook, user: nil)).to be_invalid end 

however, when running rspec, following output:

1) cookbook invalid without user    failure/error: expect(factorygirl.build(:cookbook, user: nil)).to be_invalid    nomethoderror:      undefined method `cookbooks' nil:nilclass 

so, then, test error being raised, made test this:

it "is invalid without user"   expect{factorygirl.build(:cookbook, user: nil)}.to raise_error(nomethoderror) end 

however, test fails following output:

1) cookbook invalid without user    failure/error: expect{factorygirl.build(:cookbook, user: nil)}.to raise_error(nomethoderror)      expected nomethoderror nothing raised 

if means anything, here factory cookbook:

require 'faker'  factorygirl.define   factory :cookbook |f|     f.title "#{faker::name.first_name}'s recipes"     f.description "#{faker::name.last_name}'s favorite recipes."     f.user 1   end end 

how should go writing model test makes sure user required when creating cookbook?

within model may have validation or before callback calls bookshelves on user model. when call be_invalid on test, rspec calls valid? on object built through factorygirl. object runs validations , error raised since tries call bookshelves on nil object (user).

when test error raising, doesn't happen because valid? wasn't called on object. test raise error if way:

it "is invalid without user"   expect{factorygirl.build(:cookbook, user: nil).valid?}.to raise_error(nomethoderror) end 

however don't recommend make change on test make pass. should go model , check whether user present before calling bookshelves on it. if don't so, app break whenever try create cookbook without user.