I'm not treating Spock nice?

RecenteControllerSpec.groovy

class RecenteControllerSpec extends IntegrationSpec {

  def grailsApplication
	
	@Shared
	Long formId
	
    def setup() {
		
		formId = null
		
		Usuario usuario = new Usuario(nome: 'Admin', login: 'ADMIN', email: 'inovacao@insoft4.com.br', senha: 'xxx')
		assert usuario.save()
		
		def programas = [
			[cod: 'FW001', descr: 'Fusos Horários', chave: 'menu.fw001.mainPanel.title', modulo: 'fw.test'],
			[cod: 'FW002', descr: 'Tolerâncias de Acesso', chave: 'menu.fw002.mainPanel.title', modulo: 'fw.test'],
			[cod: 'FW003', descr: 'Perfis de Acesso', chave: 'menu.fw003.mainPanel.title', modulo: 'fw.test'],
			[cod: 'FW004', descr: 'Tipos de Pessoas', chave: 'menu.fw004.mainPanel.title', modulo: 'fw.test'],
			[cod: 'FW005', descr: 'Teste', chave: 'menu.fw005.mainPanel.title', modulo: 'fw.test']
		]

		programas.each { prg ->
			Programa programa = new Programa(prg)
			assert programa.save(flush: true)
			if(!formId) {
				formId = programa.id
				println "###### formId defined: $formId"
			}
		}
		
		println "####### formId in the end: $formId"
		
    }

	@Unroll
    def "test my controller with different ids"() {
		
		given: "The controller..."
			def controller = getController()
		
		when: "Calling registrarRecente to the defined id"	
			println "------> Calling for id: $prog"
			SpringSecurityUtils.doWithAuth("ADMIN") {
				controller.registrarRecente(prog ? prog : formId) //if I use formId directly it works, why?
			}
		
		then: "Response text must be as expected"
			assert controller.response.text.contains(sucessoText)
			assert controller.response.text.contains(message)	
			
		where:
			prog       | sucessoText         | message
			formId     | '"success":true'    | '"data":'
			99         | '"success":false'   | '"message":"Record not found."'
			//prog << [programaId, 99] tried also...
			 
	}
	
	def getController() {
		return grailsApplication.mainContext.getBean(RecenteController.class.name)
	}