abstract ProviderInternal<T> providerWithSelfReference()

        def "calling #consumer throws exception if user code causes circular evaluation"(
            Consumer<ProviderInternal<?>> consumer
        ) {
            given:
            def provider = providerWithSelfReference()

            when:
            consumer.accept(provider)

            then:

class BiProviderTest {
    static class BiProviderCircularFunctionEvaluationTest extends CircularFunctionEvaluationSpec<String> {
        @Override
        ProviderInternal<String> providerWithSelfReference() {
            def transform = new BiFunction<String, String, String>() {
                ProviderInternal<String> provider

                @Override
                String apply(String a, String b) {

    }

    static class MappingProviderCircularFunctionEvaluationTest extends CircularFunctionEvaluationSpec<String> {
        @Override
        ProviderInternal<String> providerWithSelfReference() {
            def transform = new Transformer<String, String>() {
                ProviderInternal<String> provider

                @Override
                String transform(String s) {

class FlatMapProviderTest {
    static class FlatMapProviderCircularFunctionEvaluationTest extends CircularFunctionEvaluationSpec<String> {
        @Override
        ProviderInternal<String> providerWithSelfReference() {
            def transform = new Transformer<Provider<String>, String>() {
                ProviderInternal<String> provider

                @Override
                Provider<String> transform(String s) {

            return null
        }
    }

    static class DefaultProviderCircularFunctionEvaluationTest extends CircularFunctionEvaluationSpec<String> {
        @Override
        ProviderInternal<String> providerWithSelfReference() {
            def callable = new Callable<String>() {
                def provider

                @Override
                String call() throws Exception {
                    return provider.get()

        return property
    }

    static class FilteringProviderCircularFunctionEvaluationTest extends CircularFunctionEvaluationSpec<String> {
        @Override
        ProviderInternal<String> providerWithSelfReference() {
            def spec = new Spec<String>() {
                ProviderInternal<String> provider

                @Override
                boolean isSatisfiedBy(String element) {

        return property
    }

    static class TransformBackedProviderCircularFunctionEvaluationTest extends CircularFunctionEvaluationSpec<String> {
        @Override
        ProviderInternal<String> providerWithSelfReference() {
            def transform = new Transformer<String, String>() {
                ProviderInternal<String> provider

                @Override
                String transform(String s) {