@Override
    void visitSpecAnnotation(CleanupTestDirectory annotation, SpecInfo spec) {
        spec.features.each { FeatureInfo feature ->
            feature.addIterationInterceptor(new FailureCleanupInterceptor(annotation.fieldName()))
        }
    }

    private static class FailureCleanupInterceptor implements IMethodInterceptor {
        final String fieldName

    @Override
    void visitSpecAnnotation(RedirectStdIn annotation, SpecInfo spec) {
        spec.bottomSpec.allFeatures.each {
            it.addIterationInterceptor(interceptor)
        }
    }

    private static class RedirectingInterceptor implements IMethodInterceptor {

        private PipedInputStream emulatedSystemIn
        private OutputStream stdinPipe