Application.groovy

package ru.d10xa.hibernate

import org.springframework.data.repository.CrudRepository

import javax.persistence.*

@Entity
class Language {
    @Id @GeneratedValue Long id;
    String name
    Integer year
}

interface LanguageRepository
        extends CrudRepository<Language, Long> {
    Language findByName(String name)
}

build.gradle

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:1.2.5.RELEASE")
    }
}

apply plugin: 'groovy'
apply plugin: 'spring-boot'

repositories {
    mavenCentral()
    maven { url "https://repository.jboss.org/nexus/content/repositories/releases" }
}

dependencies {
    compile 'org.codehaus.groovy:groovy-all:2.4.4'
    compile 'org.springframework.boot:spring-boot-starter-data-jpa'
    compile 'com.h2database:h2'
    testCompile 'org.springframework.boot:spring-boot-starter-test'
    testCompile 'org.spockframework:spock-core:0.7-groovy-2.0'
    testCompile 'org.spockframework:spock-spring:0.7-groovy-2.0'
}

sourceSets.test.groovy {
    srcDir projectDir.absolutePath
}
test.outputs.upToDateWhen { false }

Spec.groovy

package ru.d10xa.hibernate

import org.springframework.beans.factory.annotation.Autowired
import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.boot.test.SpringApplicationContextLoader
import org.springframework.test.context.ContextConfiguration
import org.springframework.transaction.annotation.EnableTransactionManagement
import org.springframework.transaction.annotation.Transactional
import spock.lang.Specification
import spock.lang.Unroll

@ContextConfiguration(loader = SpringApplicationContextLoader, classes = Spec)
@EnableTransactionManagement
@Transactional
@SpringBootApplication
@Unroll
public class Spec extends Specification {

    @Autowired
    LanguageRepository repo;

    def '#name appeared in #year'() {
        given:
        repo.save([name: 'java', year: 1995] as Language)
        repo.save([name: 'groovy', year: 2003] as Language)
        repo.save([name: 'javascript', year: 1995] as Language)

        when:
        def language = repo.findByName(name)

        then:
        language.year == year

        where:

        name         | year
        'java'       | 1995
        'groovy'     | 2003
        'javascript' | 1995
    }

}