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/*
 * Copyright (c) 2014 Spotify AB.
 *
 * 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 com.spotify.helios.system;

import com.spotify.helios.Polling;
import com.spotify.helios.client.HeliosClient;
import com.spotify.helios.common.descriptors.Deployment;
import com.spotify.helios.common.descriptors.Job;
import com.spotify.helios.common.descriptors.JobId;
import com.spotify.helios.common.protocol.CreateJobResponse;
import com.spotify.helios.common.protocol.JobDeleteResponse;
import com.spotify.helios.common.protocol.JobDeployResponse;
import com.spotify.helios.common.protocol.JobUndeployResponse;

import org.junit.Test;

import java.util.List;
import java.util.concurrent.Callable;

import static com.spotify.helios.common.descriptors.Goal.START;
import static com.spotify.helios.common.descriptors.HostStatus.Status.UP;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.junit.Assert.assertEquals;

public class UndeployRaceTest extends SystemTestBase {

  @Test
  public void test() throws Exception {
    startDefaultMaster();

    final String agentId = "test-agent-id";

    final HeliosClient client = defaultClient();

    // Register a host without the agent running
    client.registerHost(testHost(), agentId);

    // Create, deploy and undeploy a job on the host without the agent running
    final Job job = Job.newBuilder()
        .setName(testJobName)
        .setVersion(testJobVersion)
        .setImage(BUSYBOX)
        .setCommand(IDLE_COMMAND)
        .build();
    final JobId jobId = job.getId();
    final CreateJobResponse created = client.createJob(job).get();
    assertEquals(CreateJobResponse.Status.OK, created.getStatus());

    final Deployment deployment = Deployment.of(jobId, START);

    // Wait for host to be registered in the master. Otherwise, the client.deploy() call will
    // return HOST_NOT_FOUND
    Polling.await(LONG_WAIT_SECONDS, SECONDS, new Callable() {
      @Override
      public String call() throws Exception {
        final List hosts = client.listHosts().get();
        if (hosts.contains(testHost())) {
          return testHost();
        }
        return null;
      }
    });

    final JobDeployResponse deployed = client.deploy(deployment, testHost()).get();
    assertEquals(JobDeployResponse.Status.OK, deployed.getStatus());

    final JobUndeployResponse undeployed = client.undeploy(jobId, testHost()).get();
    assertEquals(JobUndeployResponse.Status.OK, undeployed.getStatus());

    // Start agent
    startDefaultAgent(testHost(), "--id", agentId);

    awaitHostRegistered(client, testHost(), LONG_WAIT_SECONDS, SECONDS);
    awaitHostStatus(client, testHost(), UP, LONG_WAIT_SECONDS, SECONDS);

    // Wait for the task to disappear
    awaitTaskGone(client, testHost(), jobId, LONG_WAIT_SECONDS, SECONDS);

    // Verify that the job can be deleted
    assertEquals(JobDeleteResponse.Status.OK, client.deleteJob(jobId).get().getStatus());
  }
}