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.beam.runners.fnexecution.environment;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.containsString;
  import static org.hamcrest.Matchers.instanceOf;
  import static org.hamcrest.Matchers.is;
  import static org.hamcrest.Matchers.lessThan;
  
  import java.io.IOException;
  import java.util.concurrent.TimeUnit;
  import org.apache.beam.runners.fnexecution.environment.testing.NeedsDocker;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Stopwatch;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableList;
  import org.junit.Assert;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  import org.junit.rules.ExpectedException;
  import org.junit.rules.Timeout;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link DockerCommand}. */
  @Category(NeedsDocker.class)
  @RunWith(JUnit4.class)
  public class DockerCommandTest {
    @Rule public transient Timeout globalTimeout = Timeout.seconds(600);
    @Rule public ExpectedException thrown = ExpectedException.none();
  
    @Test
    public void helloWorld() throws Exception {
      DockerCommand docker = DockerCommand.getDefault();
      String container = docker.runImage("hello-world", ImmutableList.of(), ImmutableList.of());
      System.out.printf("Started container: %s%n", container);
    }
  
    @Test
    public void killContainer() throws Exception {
      DockerCommand docker = DockerCommand.getDefault();
      String container =
          docker.runImage(
              "debian", ImmutableList.of(), ImmutableList.of("/bin/bash", "-c", "sleep 60"));
      Stopwatch stopwatch = Stopwatch.createStarted();
      assertThat("Container should be running.", docker.isContainerRunning(container), is(true));
      docker.killContainer(container);
      long elapsedSec = stopwatch.elapsed(TimeUnit.SECONDS);
      assertThat(
          "Container termination should complete before image self-exits",
          elapsedSec,
          is(lessThan(60L)));
      assertThat("Container should be terminated.", docker.isContainerRunning(container), is(false));
    }
  
    @Test
    public void capturesErrorOutput() throws Exception {
      DockerCommand docker = DockerCommand.getDefault();
      thrown.expect(instanceOf(IOException.class));
      thrown.expectMessage(containsString("Error response from daemon"));
      String badImageName = "this-image-should-hopefully-never-exist";
      String container = docker.runImage(badImageName, ImmutableList.of(), ImmutableList.of());
      // We should never reach this line, but clean up in case we do.
      docker.killContainer(container);
      Assert.fail(String.format("Container creation for %s should have failed", badImageName));
    }
  }
  