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 IndirectAgentLBShuffleAlgorithmTest {
      private IndirectAgentLBAlgorithm algorithm = new IndirectAgentLBShuffleAlgorithm();
  
      private List<String> msList = Arrays.asList("10.1.1.1", "10.1.1.2", "10.1.1.3");
  
      @Test
      public void testGetMSList() throws Exception {
          for (int i = 0; i < 100; i++) {
              final List<String> newList = algorithm.sort(msList, null, null);
              if (!msList.equals(newList)) {
                  return;
              }
              Thread.sleep(10);
          }
          Assert.fail("Shuffle failed to produce a randomly sorted management server list");
      }
  
      @Test
      public void testName() throws Exception {
          Assert.assertEquals(algorithm.getName(), "shuffle");
      }
  
      @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(msList, Arrays.asList("10.1.1.1", "10.1.1.2", "10.1.1.3")));
          Assert.assertTrue(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));
      }
  }
  