content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.arrow.flight;
  
  import static org.apache.arrow.flight.FlightTestUtil.LOCALHOST;
  import static org.apache.arrow.flight.Location.forGrpcInsecure;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import java.util.Iterator;
  import java.util.Optional;
  import org.apache.arrow.flight.auth.ClientAuthHandler;
  import org.apache.arrow.flight.auth.ServerAuthHandler;
  import org.apache.arrow.memory.BufferAllocator;
  import org.apache.arrow.memory.RootAllocator;
  import org.junit.jupiter.api.Test;
  
  public class TestAuth {
  
    /** An auth handler that does not send messages should not block the server forever. */
    @Test
    public void noMessages() throws Exception {
      assertThrows(
          RuntimeException.class,
          () -> {
            try (final BufferAllocator allocator = new RootAllocator(Integer.MAX_VALUE);
                final FlightServer s =
                    FlightServer.builder(
                            allocator, forGrpcInsecure(LOCALHOST, 0), new NoOpFlightProducer())
                        .authHandler(new OneshotAuthHandler())
                        .build()
                        .start();
                final FlightClient client =
                    FlightClient.builder(allocator, s.getLocation()).build()) {
              client.authenticate(
                  new ClientAuthHandler() {
                    @Override
                    public void authenticate(ClientAuthSender outgoing, Iterator<byte[]> incoming) {}
  
                    @Override
                    public byte[] getCallToken() {
                      return new byte[0];
                    }
                  });
            }
          });
    }
  
    /** An auth handler that sends an error should not block the server forever. */
    @Test
    public void clientError() throws Exception {
      assertThrows(
          RuntimeException.class,
          () -> {
            try (final BufferAllocator allocator = new RootAllocator(Integer.MAX_VALUE);
                final FlightServer s =
                    FlightServer.builder(
                            allocator, forGrpcInsecure(LOCALHOST, 0), new NoOpFlightProducer())
                        .authHandler(new OneshotAuthHandler())
                        .build()
                        .start();
                final FlightClient client =
                    FlightClient.builder(allocator, s.getLocation()).build()) {
              client.authenticate(
                  new ClientAuthHandler() {
                    @Override
                    public void authenticate(ClientAuthSender outgoing, Iterator<byte[]> incoming) {
                      outgoing.send(new byte[0]);
                      // Ensure the server-side runs
                      incoming.next();
                      outgoing.onError(new RuntimeException("test"));
                    }
  
                    @Override
                    public byte[] getCallToken() {
                      return new byte[0];
                    }
                  });
            }
          });
    }
  
    private static class OneshotAuthHandler implements ServerAuthHandler {
  
      @Override
      public Optional<String> isValid(byte[] token) {
        return Optional.of("test");
      }
  
      @Override
      public boolean authenticate(ServerAuthSender outgoing, Iterator<byte[]> incoming) {
        incoming.next();
        outgoing.send(new byte[0]);
        return false;
      }
    }
  }
  