testing - Rails model method rspec test -

i have following test:

it 'should return array of other cars @ garage (excluding itself)' g1 = factorygirl.create(:garage)

c1 = factorygirl.create(:car) c1.garage = g1  c2 = factorygirl.create(:car) c2.name = "ford 1" c2.garage = g1  c3 = factorygirl.create(:car) c3.name = "vw 1" c3.garage = g1  expect(c1.other_cars_at_garage).to eq([c2, c3]) 

end

which should test method on model:

  def other_cars_at_garage     garage.cars.where.not(id: self.id)   end 

when run test, fails returns: #<activerecord::associationrelation []>

how should test pass? how check ar::associationrelation?

you not saving association between c1/c2/c3 , g1

c1 = factorygirl.create(:car) c1.garage = g1 c1.save #this saves g1 in c1's garage  c2 = factorygirl.create(:car) c2.name = "ford 1" c2.garage = g1 c2.save  c3 = factorygirl.create(:car) c3.name = "vw 1" c3.garage = g1 c3.save 

in addition, it's best use

expect(c1.other_cars_at_garage).to match_array([c2, c3]) 

notice match_array instead of eq, means order of array unimportant, eq means order of array important