Example Spock Test

RatingServiceIntSpec.groovy

@Slf4j
class RatingServiceIntSpec extends BaseDatabaseIntSpec {

    RatingService ratingService

    def setup() {
        ratingService = injector.getInstance(RatingService.class)
    }

    def 'Test that save ratings persists and update'() {
        given: 'Database starts empty of ratings'
        assert 0 == em.createQuery('select count(*) from Rating').singleResult
        scaffoldUsers()
        scaffoldMovies()

        when: '2 ratings are saved'
        ratingService.saveRatings([
                new Rating([ratingId: new RatingId([user: user1, movie: movie1]), positive: true]),
                new Rating([ratingId: new RatingId([user: user1, movie: movie2]), positive: false])
        ])

        then: 'The database contains 2 ratings'
        2 == em.createQuery('select count(*) from Rating').singleResult

        when: 'A rating is updated'
        ratingService.saveRatings(
                [new Rating([ratingId: new RatingId([user: user1, movie: movie1]), positive: false])]
        )
        Rating rating = em.find(Rating.class, new RatingId([user: user1, movie: movie1]))

        then: 'The database still only contains 2 ratings'
        2 == em.createQuery('select count(*) from Rating').singleResult

        and: 'The update is reflected'
        null != rating.positive
        !rating.positive
    }

}