Rspec test belongs_to with shoulda_matchers

Question

I have this code in my model.

belongs_to :user, -> { includes :user_profile }

I went through shoulda doc i did not found any way to test that proc containing includes part. Please help.

Answer 1

Assuming the model in question is named Car (you haven't posted the name of the enclosing class so I'm totally making this up) you can test it as:

describe 'user' do
  let(:car) { create_car_somehow }

  it 'preloads the user_profile association' do
    expect(car.user.association(:user_profile)).to be_loaded
  end
end

#association returns metadata of the specified association (of type ActiveRecord::Associations::BelongsToAssociation and so on). The returned object responds to #loaded? which returns true if the association has been loaded and false otherwise.