Spock GroovyScript Spec

hello.groovy

println "Hello groovy!"

SampleSpec.groovy

import spock.lang.Specification
import spock.lang.Unroll

class SampleSpec extends Specification {

    @Unroll
    def "#scriptfile evaluate"() {

        setup:
        def content = new StringWriter()
        Binding binding = new Binding()
        binding.out = new PrintWriter(content)
        GroovyShell shell = new GroovyShell(binding)

        when:
        shell.evaluate(new File(scriptfile))

        then:
        content.toString().trim() == result

        where:
        scriptfile     | result
        "hello.groovy" | "Hello groovy!"
    }

}