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.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import java.io.File;
  import java.lang.reflect.InvocationTargetException;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.util.Arrays;
  import java.util.List;
  import org.apache.arrow.vector.test.util.ArrowTestDataUtil;
  import org.junit.jupiter.api.function.Executable;
  
  /** Utility methods and constants for testing flight servers. */
  public class FlightTestUtil {
  
    public static final String LOCALHOST = "localhost";
  
    static Path getFlightTestDataRoot() {
      return ArrowTestDataUtil.getTestDataRoot().resolve("flight");
    }
  
    static Path exampleTlsRootCert() {
      return getFlightTestDataRoot().resolve("root-ca.pem");
    }
  
    static List<CertKeyPair> exampleTlsCerts() {
      final Path root = getFlightTestDataRoot();
      final Path cert0Pem = root.resolve("cert0.pem");
      if (!Files.exists(cert0Pem)) {
        throw new RuntimeException(
            cert0Pem
                + " doesn't exist. Make sure submodules are initialized (see https://arrow.apache.org/docs/dev/developers/java/building.html#building)");
      }
      return Arrays.asList(
          new CertKeyPair(cert0Pem.toFile(), root.resolve("cert0.pkcs1").toFile()),
          new CertKeyPair(root.resolve("cert1.pem").toFile(), root.resolve("cert1.pkcs1").toFile()));
    }
  
    static boolean isEpollAvailable() {
      try {
        Class<?> epoll = Class.forName("io.netty.channel.epoll.Epoll");
        return (Boolean) epoll.getMethod("isAvailable").invoke(null);
      } catch (ClassNotFoundException
          | NoSuchMethodException
          | IllegalAccessException
          | InvocationTargetException e) {
        return false;
      }
    }
  
    static boolean isKqueueAvailable() {
      try {
        Class<?> kqueue = Class.forName("io.netty.channel.kqueue.KQueue");
        return (Boolean) kqueue.getMethod("isAvailable").invoke(null);
      } catch (ClassNotFoundException
          | NoSuchMethodException
          | IllegalAccessException
          | InvocationTargetException e) {
        return false;
      }
    }
  
    static boolean isNativeTransportAvailable() {
      return isEpollAvailable() || isKqueueAvailable();
    }
  
    /**
     * Assert that the given runnable fails with a Flight exception of the given code.
     *
     * @param code The expected Flight status code.
     * @param r The code to run.
     * @return The thrown status.
     */
    public static CallStatus assertCode(FlightStatusCode code, Executable r) {
      final FlightRuntimeException ex = assertThrows(FlightRuntimeException.class, r);
      assertEquals(code, ex.status().code());
      return ex.status();
    }
  
    public static class CertKeyPair {
  
      public final File cert;
      public final File key;
  
      public CertKeyPair(File cert, File key) {
        this.cert = cert;
        this.key = key;
      }
    }
  
    private FlightTestUtil() {}
  }
  