Spockこういう書き方もできる

WebHandlerSpec.groovy

package org.mikeneck.grenail

import spock.lang.Specification

class WebHandlerSpec extends Specification {

    def 'initialize test' () {
        when   :
        def handler = init

        then   :
        handler.root == file

        where  :
        init                     | file
        new WebHandler()         | new File('.')
        new WebHandler('public') | new File('public')
    }
}