Grails @Integration and Spock example that uses setupSpec

BookSpec.groovy

package integtest

import grails.test.mixin.integration.Integration
import grails.transaction.*

import spock.lang.*
import geb.spock.*
import grails.util.*

import java.util.concurrent.Callable
import java.util.concurrent.ExecutorService
import java.util.concurrent.Executors
import java.util.concurrent.Future
import java.util.concurrent.TimeUnit
import spock.lang.Shared
import org.springframework.context.*
import org.grails.datastore.mapping.engine.event.*
/**
 * See the API for {@link grails.test.mixin.support.GrailsUnitTestMixin} for usage instructions
 */
@Integration
@Rollback
class BookSpec extends GebSpec {

    @Shared Future future
    @Shared def executor
    @Shared context

    def setupSpec() {
        context = Holders.findApplicationContext()
        def fixture = {
            new Book(title:"Blah").save()
        }
        if(context == null || !context.isActive()) {
            executor = Executors.newSingleThreadExecutor()
            future = executor.submit {
                while(Holders.findApplicationContext() == null) {
                    // wait
                    sleep 10
                }
                context = Holders.findApplicationContext()
                context.addApplicationListener { ApplicationEvent event ->
                    if(event instanceof DatastoreInitializedEvent)  {
                        Book.withTransaction(fixture)
                    }
                }
            }
        }
        else {
            // context already exists so just use it
            Book.withTransaction(fixture)
        }

    }

    def cleanupSpec() {
        executor?.shutdown()
    }

    def setup() {
        future.get(90, TimeUnit.SECONDS)

    }

    def cleanup() {
    }

    void "test something"() {
        when:
            new Book(title:"The Stand").save()
        then:
            Book.count() == 2
    }

    void "test something 2"() {
        expect:
            Book.count() == 1
    }    
}

What have you done 😱