example_test_external_api.rb

    describe '#fetch_from_kinopoisk(kinopoisk_id)' do

      context 'when movie with such kinopoisk_id exist' do
        it 'updates movie with fresh data' do
          stub_kinopoisk_get_film(1)
          movie = create(:movie, kinopoisk_id: 1)
          Movie.fetch_from_kinopoisk(movie.kinopoisk_id)
          expect(Movie.find(movie.id).title_en).to eq('Star Wars: Episode VII - The Force Awakens')
        end
      end
      context 'when movie with such kinopoisk_id does not exist' do
        it 'creates movie with data and links with genres and countries and creates facts' do
          stub_kinopoisk_get_film(1)
          movie = create(:movie, kinopoisk_id: 2)
          create(:genre_fantasy)
          create(:genre_fiction)
          create(:genre_action)
          create(:country_us)
          Movie.fetch_from_kinopoisk(1)
          expect(Movie.last.title_en).to eq('Star Wars: Episode VII - The Force Awakens')
          expect(Movie.last.genres.map(&:title_en)).to eq(%w(fantasy fiction action))
          expect(Movie.last.countries.map(&:title_en)).to eq(%w(USA))
          expect(Movie.last.facts.count).to eq(116)
          expect(Movie.last).not_to eq(movie)
        end
      end
      context 'when movie with such kinopoisk_id does not exist on kinopoisk' do
        it 'raise MovieNotFoundInKinopoiskDatabaseRrror' do
          stub_kinopoisk_get_film_nil
          expect{ Movie.fetch_from_kinopoisk(999_999_999) }.to raise_error(MovieNotFoundInKinopoiskError)
        end
      end
    end
  end