How to prepare test data in Micronaut with Dru

If you decide to use GORM with Micronaut you can easily use Dru to setup your test data.

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How to prepare test data in Micronaut with Dru

If you decide to use GORM with Micronaut you can easily use Dru to setup your test data.

Add following dependency to your build.gradle file:

String druVersion = **‘0.3.1’

testCompile "com.agorapulse:dru:$druVersion"
testCompile "com.agorapulse:dru-client-gorm:$druVersion"

You may also want to add additional data source parser such as dru-parser-json.

Let’s imagine you have a simple domain Greetings:

package hello.world

import grails.gorm.annotation.Entity

@Entity
class Greetings {

    String language    String greeting

    static _constraints_ = {
        language minSize: 2, maxSize: 2
        greeting size: 1..255
    }
}

And a GORM data service GreetingsService:

package hello.world

import grails.gorm.services.Service


@Service(Greetings)
interface GreetingsService {

Greetings findByLanguage(String language)  

}

You can easily use these with Dru in your tests:

package hello.world

import com.agorapulse.dru.Dru
import grails.gorm.transactions.Rollback
import io.micronaut.context.ApplicationContext
import io.micronaut.runtime.server.EmbeddedServer
import org.junit.Rule
import spock.lang.AutoCleanup
import spock.lang.Shared
import spock.lang.Specification

@Rollback
class GreetingsSpec extends Specification {

    @Shared @AutoCleanup
    EmbeddedServer server = ApplicationContext._run_(EmbeddedServer)

    @Shared
    GreetingsService service = server.applicationContext

                                 .getBean(GreetingsService)  

    private static final List<Map<String, String>> \1 = \[
            \[language: 'dk', greeting: 'Hej Verden!'\],
            \[language: 'en', greeting: 'Hello World!'\],
            \[language: 'es', greeting: 'Hola Mundo!'\],

\]  

    @Rule Dru dru = Dru._plan_ {
        from 'GREETINGS', {

        map {  
            to Greetings  
        }  
    }  
}  

    void setup() {
        dru.load()
    }

    void 'load with dru and fetch by gorm method'() {
        expect:
            dru.findAllByType(Greetings).size() == 3
            Greetings._findByLanguage_('dk')
    }

    void 'load with dru and fetch by gorm service'() {
        expect:
            dru.findAllByType(Greetings).size() == 3
            service.findByLanguage('dk')
    }
}

The important part is grails.gorm.transactions.Rollback annotation applied to the test class which guarantees transaction present for every test call and also it also help to keep the database clean.

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