/*
 * 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.beam.fn.harness.channel;

import static org.junit.Assert.assertEquals;
import static org.junit.Assume.assumeTrue;

import io.grpc.ManagedChannel;
import org.apache.beam.fn.v1.BeamFnApi.ApiServiceDescriptor;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Tests for {@link ManagedChannelFactory}. */
@RunWith(JUnit4.class)
public class ManagedChannelFactoryTest {
  @Rule public TemporaryFolder tmpFolder = new TemporaryFolder();

  @Test
  public void testDefaultChannel() {
    ApiServiceDescriptor apiServiceDescriptor = ApiServiceDescriptor.newBuilder()
        .setUrl("localhost:123")
        .build();
    ManagedChannel channel = ManagedChannelFactory.from(PipelineOptionsFactory.create())
        .forDescriptor(apiServiceDescriptor);
    assertEquals("localhost:123", channel.authority());
    channel.shutdownNow();
  }

  @Test
  public void testEpollHostPortChannel() {
    assumeTrue(io.netty.channel.epoll.Epoll.isAvailable());
    ApiServiceDescriptor apiServiceDescriptor = ApiServiceDescriptor.newBuilder()
        .setUrl("localhost:123")
        .build();
    ManagedChannel channel = ManagedChannelFactory.from(
        PipelineOptionsFactory.fromArgs(new String[]{ "--experiments=beam_fn_api_epoll" }).create())
        .forDescriptor(apiServiceDescriptor);
    assertEquals("localhost:123", channel.authority());
    channel.shutdownNow();
  }

  @Test
  public void testEpollDomainSocketChannel() throws Exception {
    assumeTrue(io.netty.channel.epoll.Epoll.isAvailable());
    ApiServiceDescriptor apiServiceDescriptor = ApiServiceDescriptor.newBuilder()
        .setUrl("unix://" + tmpFolder.newFile().getAbsolutePath())
        .build();
    ManagedChannel channel = ManagedChannelFactory.from(
        PipelineOptionsFactory.fromArgs(new String[]{ "--experiments=beam_fn_api_epoll" }).create())
        .forDescriptor(apiServiceDescriptor);
    assertEquals(apiServiceDescriptor.getUrl().substring("unix://".length()), channel.authority());
    channel.shutdownNow();
  }
}