How to Gain access to applicaiton data

JobSpec.groovy

@TestFor(MyQuartzJob)
@TestMixin(ControllerUnitTestMixin) // This allows access to grailsApplication
class MyQuartzJobSpec extends Specification {
    def job

    def setup() {
        grailsApplication.config.some.config.stuff = true
        job = new MyQuartzJob()
    }
}