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.ambari.server.agent.stomp;
  
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.HashSet;
  
  import org.apache.ambari.server.NullHostNameException;
  import org.apache.ambari.server.agent.stomp.dto.TopologyCluster;
  import org.apache.ambari.server.agent.stomp.dto.TopologyComponent;
  import org.apache.ambari.server.agent.stomp.dto.TopologyHost;
  import org.apache.ambari.server.agent.stomp.dto.TopologyUpdateHandlingReport;
  import org.apache.ambari.server.events.UpdateEventType;
  import org.junit.Assert;
  import org.junit.Test;
  
  public class TopologyClusterTest {
  
    @Test
    public void testHandlingReportHostAdd() throws NullHostNameException {
      TopologyHost dummyHost = new TopologyHost(1L, "hostName1");
      TopologyHost hostToAddition = new TopologyHost(2L, "hostName2");
  
      TopologyCluster topologyCluster = new TopologyCluster(new HashSet<>(), new HashSet(){{add(dummyHost);}});
  
      TopologyUpdateHandlingReport report = new TopologyUpdateHandlingReport();
  
      topologyCluster.update(Collections.emptySet(), Collections.singleton(hostToAddition), UpdateEventType.UPDATE, report);
  
      Assert.assertEquals(1L, report.getUpdatedHostNames().size());
      Assert.assertEquals("hostName2", report.getUpdatedHostNames().iterator().next());
  
      Assert.assertEquals(2L, topologyCluster.getTopologyHosts().size());
    }
  
    @Test
    public void testHandlingReportHostDelete() throws NullHostNameException {
      TopologyHost dummyHost = new TopologyHost(1L, "hostName1");
      TopologyHost hostToDelete = new TopologyHost(2L, "hostName2");
      TopologyHost update = new TopologyHost(2L, "hostName2");
  
      TopologyCluster topologyCluster = new TopologyCluster(new HashSet<>(), new HashSet(){{add(dummyHost); add(hostToDelete);}});
  
      TopologyUpdateHandlingReport report = new TopologyUpdateHandlingReport();
  
      topologyCluster.update(Collections.emptySet(), Collections.singleton(update), UpdateEventType.DELETE, report);
  
      Assert.assertEquals(1L, report.getUpdatedHostNames().size());
      Assert.assertEquals("hostName2", report.getUpdatedHostNames().iterator().next());
  
      Assert.assertEquals(1L, topologyCluster.getTopologyHosts().size());
      Assert.assertEquals("hostName1", topologyCluster.getTopologyHosts().iterator().next().getHostName());
    }
  
    @Test
    public void testHandlingReportHostUpdate() throws NullHostNameException {
      TopologyHost dummyHost = new TopologyHost(1L, "hostName1");
      TopologyHost hostToUpdate = new TopologyHost(2L, "hostName2");
      TopologyHost update = new TopologyHost(2L, "hostName2", "rack","ipv4");
  
      TopologyCluster topologyCluster = new TopologyCluster(new HashSet<>(), new HashSet(){{add(dummyHost); add(hostToUpdate);}});
  
      TopologyUpdateHandlingReport report = new TopologyUpdateHandlingReport();
  
      topologyCluster.update(Collections.emptySet(), Collections.singleton(update), UpdateEventType.UPDATE, report);
  
      Assert.assertEquals(1L, report.getUpdatedHostNames().size());
      Assert.assertEquals("hostName2", report.getUpdatedHostNames().iterator().next());
  
      Assert.assertEquals(2L, topologyCluster.getTopologyHosts().size());
    }
  
    @Test
    public void testHandlingReportComponentAdd() throws NullHostNameException {
      TopologyComponent dummyComponent = createDummyTopologyComponent("comp1",
          new Long[]{1L, 2L}, new String[]{"hostName1", "hostName2"});
      TopologyComponent componentToAddition = createDummyTopologyComponent("comp2",
          new Long[]{1L, 3L}, new String[]{"hostName1", "hostName3"});
  
      TopologyCluster topologyCluster = new TopologyCluster(new HashSet(){{add(dummyComponent);}}, new HashSet<>());
  
      TopologyUpdateHandlingReport report = new TopologyUpdateHandlingReport();
  
      topologyCluster.update(Collections.singleton(componentToAddition), Collections.emptySet(), UpdateEventType.UPDATE, report);
  
      Assert.assertEquals(2L, report.getUpdatedHostNames().size());
      Assert.assertTrue(report.getUpdatedHostNames().contains("hostName1"));
      Assert.assertTrue(report.getUpdatedHostNames().contains("hostName3"));
  
      Assert.assertEquals(2L, topologyCluster.getTopologyComponents().size());
    }
  
    @Test
    public void testHandlingReportComponentDeletePartially() throws NullHostNameException {
      TopologyComponent dummyComponent = createDummyTopologyComponent("comp1",
          new Long[]{1L, 2L}, new String[]{"hostName1", "hostName2"});
      TopologyComponent componentToDelete = createDummyTopologyComponent("comp2",
          new Long[]{1L, 3L}, new String[]{"hostName1", "hostName3"});
  
      TopologyComponent update = createDummyTopologyComponent("comp2",
          new Long[]{1L}, new String[]{"hostName1"});
  
      TopologyCluster topologyCluster = new TopologyCluster(
          new HashSet(){{add(dummyComponent); add(componentToDelete);}}, new HashSet<>());
  
      TopologyUpdateHandlingReport report = new TopologyUpdateHandlingReport();
  
      topologyCluster.update(Collections.singleton(update), Collections.emptySet(), UpdateEventType.DELETE, report);
  
      Assert.assertEquals(1L, report.getUpdatedHostNames().size());
      Assert.assertTrue(report.getUpdatedHostNames().contains("hostName1"));
  
      Assert.assertEquals(2L, topologyCluster.getTopologyComponents().size());
    }
  
    @Test
    public void testHandlingReportComponentDeleteFully() throws NullHostNameException {
      TopologyComponent dummyComponent = createDummyTopologyComponent("comp1",
          new Long[]{1L, 2L}, new String[]{"hostName1", "hostName2"});
      TopologyComponent componentToDelete = createDummyTopologyComponent("comp2",
          new Long[]{1L, 3L}, new String[]{"hostName1", "hostName3"});
  
      TopologyComponent update = createDummyTopologyComponent("comp2",
          new Long[]{1L, 3L}, new String[]{"hostName1", "hostName3"});
  
      TopologyCluster topologyCluster = new TopologyCluster(
          new HashSet(){{add(dummyComponent); add(componentToDelete);}}, new HashSet<>());
  
      TopologyUpdateHandlingReport report = new TopologyUpdateHandlingReport();
  
      topologyCluster.update(Collections.singleton(update), Collections.emptySet(), UpdateEventType.DELETE, report);
  
      Assert.assertEquals(2L, report.getUpdatedHostNames().size());
      Assert.assertTrue(report.getUpdatedHostNames().contains("hostName1"));
      Assert.assertTrue(report.getUpdatedHostNames().contains("hostName3"));
  
      Assert.assertEquals(1L, topologyCluster.getTopologyComponents().size());
    }
  
    @Test
    public void testHandlingReportComponentUpdate() throws NullHostNameException {
      TopologyComponent dummyComponent = createDummyTopologyComponent("comp1",
          new Long[]{1L, 2L}, new String[]{"hostName1", "hostName2"});
      TopologyComponent componentToUpdate = createDummyTopologyComponent("comp2",
          new Long[]{1L, 3L}, new String[]{"hostName1", "hostName3"});
  
      TopologyComponent update = createDummyTopologyComponent("comp2",
          new Long[]{1L, 4L}, new String[]{"hostName1", "hostName4"});
  
      TopologyCluster topologyCluster = new TopologyCluster(
          new HashSet(){{add(dummyComponent); add(componentToUpdate);}}, new HashSet<>());
  
      TopologyUpdateHandlingReport report = new TopologyUpdateHandlingReport();
  
      topologyCluster.update(Collections.singleton(update), Collections.emptySet(), UpdateEventType.UPDATE, report);
  
      Assert.assertEquals(1L, report.getUpdatedHostNames().size());
      Assert.assertTrue(report.getUpdatedHostNames().contains("hostName4"));
  
      Assert.assertEquals(2L, topologyCluster.getTopologyComponents().size());
    }
  
    private TopologyComponent createDummyTopologyComponent(String componentName, Long[] hostIds, String[] hostNames) {
      return TopologyComponent.newBuilder()
          .setComponentName(componentName)
          .setServiceName("serviceName")
          .setHostIdentifiers(new HashSet<Long>(Arrays.asList(hostIds)), new HashSet<String>(Arrays.asList(hostNames)))
          .build();
    }
  }
  