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.cloudstack.agent.lb.algorithm;
  
  import org.apache.cloudstack.agent.lb.IndirectAgentLBAlgorithm;
  import org.junit.Assert;
  import org.junit.Test;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.List;
  
  public class IndirectAgentLBRoundRobinAlgorithmTest {
      private IndirectAgentLBAlgorithm algorithm = new IndirectAgentLBRoundRobinAlgorithm();
  
      private List<String> msList = Arrays.asList("10.1.1.1", "10.1.1.2", "10.1.1.3");
      private List<Long> hostList = new ArrayList<>(Arrays.asList(1L, 5L, 10L, 20L, 50L, 60L, 70L, 80L));
  
      @Test
      public void testGetMSListForNewHost() throws Exception {
          List<String> startList = algorithm.sort(msList, hostList, null);
          Assert.assertNotEquals(msList, startList);
          Assert.assertFalse(algorithm.compare(msList, startList));
  
          hostList.add(100L);
          List<String> nextList = algorithm.sort(msList, hostList, null);
          List<String> expectedList = startList.subList(1, startList.size());
          expectedList.addAll(startList.subList(0, 1));
          Assert.assertEquals(nextList, expectedList);
      }
  
      @Test
      public void testGetMSListForExistingHost() throws Exception {
          List<String> startList = new ArrayList<>(msList);
          for (Long hostId : hostList.subList(1, hostList.size())) {
              List<String> nextList = new ArrayList<>(startList.subList(1, msList.size()));
              nextList.addAll(startList.subList(0, 1));
              List<String> expectedList = algorithm.sort(msList, hostList, hostId);
              Assert.assertEquals(expectedList, nextList);
              startList = nextList;
          }
      }
  
      @Test
      public void testName() throws Exception {
          Assert.assertEquals(algorithm.getName(), "roundrobin");
      }
  
      @Test
      public void testListComparison() throws Exception {
          Assert.assertTrue(algorithm.compare(Collections.singletonList("10.1.1.1"), Collections.singletonList("10.1.1.1")));
          Assert.assertTrue(algorithm.compare(Arrays.asList("10.1.1.2", "10.1.1.1"), Arrays.asList("10.1.1.2", "10.1.1.1")));
          Assert.assertTrue(algorithm.compare(msList, Arrays.asList("10.1.1.1", "10.1.1.2", "10.1.1.3")));
  
          Assert.assertFalse(algorithm.compare(msList, Arrays.asList("10.1.1.3", "10.1.1.2", "10.1.1.1")));
          Assert.assertFalse(algorithm.compare(msList, Arrays.asList("10.1.1.0", "10.2.2.2")));
          Assert.assertFalse(algorithm.compare(msList, new ArrayList<String>()));
          Assert.assertFalse(algorithm.compare(msList, null));
      }
  
  }
  