Ticket3703Test.java

package io.swagger.v3.core.resolving;

import io.swagger.v3.core.converter.AnnotatedType;
import io.swagger.v3.core.converter.ModelConverterContextImpl;
import io.swagger.v3.core.jackson.ModelResolver;
import io.swagger.v3.core.matchers.SerializationMatchers;
import io.swagger.v3.oas.models.media.Schema;
import org.testng.annotations.Test;

import java.util.Optional;

public class Ticket3703Test extends SwaggerTestBase {

    @Test
    public void testSelfReferencingOptional() throws Exception {

        final ModelResolver modelResolver = new ModelResolver(mapper());

        ModelConverterContextImpl context = new ModelConverterContextImpl(modelResolver);

        Schema model = context
                .resolve(new AnnotatedType(ModelContainer.class));

        SerializationMatchers.assertEqualsToYaml(context.getDefinedModels(), "Model:\n" +
                "  type: object\n" +
                "  properties:\n" +
                "    model:\n" +
                "      $ref: \"#/components/schemas/Model\"\n" +
                "ModelContainer:\n" +
                "  type: object\n" +
                "  properties:\n" +
                "    model:\n" +
                "      $ref: \"#/components/schemas/Model\"\n" +
                "    bytes:\n" +
                "      type: string\n" +
                "      format: byte");

    }

    static class ModelContainer {
        public Optional<Model> model;

        @io.swagger.v3.oas.annotations.media.Schema(type = "string", format = "byte")
        public Optional<Bytes> getBytes() {
            return null;
        }

    }

    static class Model {
        public Optional<Model> model;
    }

    static class Bytes {
        public String foo;
        public String bar;
    }

}