Spock测试框架--如何参数化@Rule资源？

import spock.lang.*
import org.junit.rules.TemporaryFolder

class MySpec extends Specification {
    @Rule
    TemporaryFolder tempFolder = new TemporaryFolder()

    def "测试文件写入功能"() {
        given:
        def file = tempFolder.newFile("test.txt")
        def content = "Hello, World!"

        when:
        file << content

        then:
        file.text == content
    }

    @Unroll
    def "测试文件写入功能 - 参数化测试"(String content) {
        given:
        def file = tempFolder.newFile("test.txt")

        when:
        file << content

        then:
        file.text == content

        where:
        content << ["Hello", "World", "Spock"]
    }
}