jar(file)
        def classpath = DefaultClassPath.of(file)
        def cachedFile = testDir.file("cached/o_e161f24809571a55f09d3f820c8e5942/thing.jar")
        transformer.transform(classpath, None)
        modifiedJar(file)

        when:
        def cachedClasspath = transformer.transform(classpath, None)

        then:
        cachedClasspath.asFiles == [cachedFile]

        and: