testing scopes in RSpec

scopes-rspec.rb

# PATTERN 1: describe > let + before + specify > expect

  describe 'scopes' do
    let(:offers) { create_list(:offer, 3, :available, :published, :shown) }

    before do
      offers.first.update(is_published: false)
      offers.second.update(is_shown: false)
    end

    specify '.shown returns correct number of offers' do
      expect(Offer.shown).not_to be_empty
    end

    specify '.usable returns correct number of offers' do
      expect(Offer.usable).not_to be_empty
    end
  end




# PATTERN 2: describe > let + before + describe > subject + it > expect

  describe 'scopes' do
    let(:offers) { create_list(:offer, 3, :available, :published, :shown) }

    before do
      offers.first.update(is_published: false)
      offers.second.update(is_shown: false)
    end

    describe '.shown' do
      subject { Offer.shown }
      it { expect(subject).not_to be_empty }
    end

    describe '.usable' do
      subject { Offer.usable }
      it { expect(subject).not_to be_empty }
    end
  end