abstract class CircularEvaluationSpec<T> extends Specification {
    List<Consumer<ProviderInternal<?>>> throwingConsumers() {
        return ProviderConsumer.values().findAll { it !in safeConsumers() }.toList()
    }

    List<Consumer<ProviderInternal<?>>> safeConsumers() {
        return [TO_STRING]
    }

    void setup() {
        assert ((throwingConsumers() + safeConsumers()) as Set).containsAll(ProviderConsumer.values())
    }

    /**