/*
 * Copyright 2012-2023 The Feign Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package feign.reactive;

import feign.Contract;
import feign.Param;
import feign.RequestLine;
import feign.reactive.ReactiveDelegatingContract;
import io.reactivex.Flowable;
import java.util.stream.Stream;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;

public class ReactiveDelegatingContractTest {

  @Rule
  public ExpectedException thrown = ExpectedException.none();

  @Test
  public void onlyReactiveReturnTypesSupported() {
    this.thrown.expect(IllegalArgumentException.class);
    Contract contract = new ReactiveDelegatingContract(new Contract.Default());
    contract.parseAndValidateMetadata(TestSynchronousService.class);
  }

  @Test
  public void reactorTypes() {
    Contract contract = new ReactiveDelegatingContract(new Contract.Default());
    contract.parseAndValidateMetadata(TestReactorService.class);
  }

  @Test
  public void reactivexTypes() {
    Contract contract = new ReactiveDelegatingContract(new Contract.Default());
    contract.parseAndValidateMetadata(TestReactiveXService.class);
  }

  @Test
  public void streamsAreNotSupported() {
    this.thrown.expect(IllegalArgumentException.class);
    Contract contract = new ReactiveDelegatingContract(new Contract.Default());
    contract.parseAndValidateMetadata(StreamsService.class);
  }

  public interface TestSynchronousService {
    @RequestLine("GET /version")
    String version();
  }

  public interface TestReactiveXService {
    @RequestLine("GET /version")
    Flowable<String> version();
  }


  public interface TestReactorService {
    @RequestLine("GET /version")
    Mono<String> version();

    @RequestLine("GET /users/{username}")
    Flux<String> user(@Param("username") String username);
  }

  public interface StreamsService {

    @RequestLine("GET /version")
    Mono<Stream<String>> version();
  }

}
