assert action.subject == ModelReference.of(ComponentSpecFactory)
        }
        0 * _

        where:
        methodName                 | _
        "validTypeRule"            | _
        "validTypeRuleSpecialized" | _
    }

    static interface CustomLanguageSourceSet extends LanguageSourceSet {}

    static class ImplementingCustomLanguageSourceSet extends BaseLanguageSourceSet implements CustomLanguageSourceSet {