First steps with a mock-less testing.

no_mocks_spec.rb

require 'factory'

describe 'A user' do
  let(:user_service)    { Tddeo::Factory.user_service }
  let(:user_repository) { Tddeo::Factory.user_repository }

  before(:all) do
    ENV['RACK_ENV'] = 'test'
  end

  before(:each) do
    user_repository.clear
  end

  describe 'a user signing up' do
    it 'creates the user' do
      user_service.sign_up(email: DUMMY_EMAIL, password: DUMMY_PASSWORD)
      expect(user_repository.count).to be 1
    end

    it 'returns the signed up user' do
      signed_up_user = user_service.sign_up(email: DUMMY_EMAIL, password: DUMMY_PASSWORD)
      expect(signed_up_user.email).to eq DUMMY_EMAIL
    end

    context 'when the email is taken' do
      it 'reports an error' do
        user_service.sign_up(email: DUMMY_EMAIL, password: DUMMY_PASSWORD)
        expect {
          user_service.sign_up(email: DUMMY_EMAIL, password: OTHER_PASSWORD)
        }.to raise_error Tddeo::EmailTaken
      end
    end
  end

  describe 'a user signing in' do
    before do
      @signed_up_user = user_service.sign_up(email: DUMMY_EMAIL, password: DUMMY_PASSWORD)
    end

    it 'authenticates the user' do
      authenticated_user = user_service.sign_in(email: DUMMY_EMAIL, password: DUMMY_PASSWORD)
      expect(authenticated_user).to eq @signed_up_user
    end

    context 'when the password is incorrect' do
      it 'reports an error' do
        expect {
          user_service.sign_in(email: DUMMY_EMAIL, password: 'wrong password')
        }.to raise_error Tddeo::IncorrectPassword
      end
    end

    context 'when no user with given email exists' do
      it 'reports an error' do
        expect {
          user_service.sign_in(email: '[email protected]', password: DUMMY_PASSWORD)
        }.to raise_error Tddeo::UserNotFound
      end
    end
  end
end