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.kafka.controller;
  
  import org.apache.kafka.common.Uuid;
  import org.apache.kafka.metadata.LeaderRecoveryState;
  import org.apache.kafka.metadata.PartitionRegistration;
  
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.Timeout;
  
  import java.util.List;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  
  @Timeout(40)
  public class PartitionReassignmentRevertTest {
      @Test
      public void testNoneAddedOrRemoved() {
          PartitionRegistration registration = new PartitionRegistration.Builder().
              setReplicas(new int[] {3, 2, 1}).setIsr(new int[] {3, 2}).
              setDirectories(new Uuid[]{
                      Uuid.fromString("Qln01zZAQMKzFTRCw22Y4w"),
                      Uuid.fromString("jjUcnIL2TxWEGMZ1mHvkPA"),
                      Uuid.fromString("JSZNFA0uQFmH1N75hQxWug")
              }).
              setLeader(3).setLeaderRecoveryState(LeaderRecoveryState.RECOVERED).setLeaderEpoch(100).setPartitionEpoch(200).build();
          PartitionReassignmentRevert revert = new PartitionReassignmentRevert(registration);
          assertEquals(List.of(3, 2, 1), revert.replicas());
          assertEquals(List.of(3, 2), revert.isr());
          assertFalse(revert.unclean());
      }
  
      @Test
      public void testSomeRemoving() {
          PartitionRegistration registration = new PartitionRegistration.Builder().
              setReplicas(new int[] {3, 2, 1}).setIsr(new int[] {3, 2}).
              setDirectories(new Uuid[]{
                      Uuid.fromString("WG58zlb5RR6TqdI81SCXeA"),
                      Uuid.fromString("izoB1H6TQdOExQ4XNMNXeQ"),
                      Uuid.fromString("TluNaJDjRemuy17sO7dDKg")
              }).
              setRemovingReplicas(new int[]{2, 1}).setLeader(3).setLeaderRecoveryState(LeaderRecoveryState.RECOVERED).setLeaderEpoch(100).setPartitionEpoch(200).build();
          PartitionReassignmentRevert revert = new PartitionReassignmentRevert(registration);
          assertEquals(List.of(3, 2, 1), revert.replicas());
          assertEquals(List.of(3, 2), revert.isr());
          assertFalse(revert.unclean());
      }
  
      @Test
      public void testSomeAdding() {
          PartitionRegistration registration = new PartitionRegistration.Builder().
              setReplicas(new int[] {4, 5, 3, 2, 1}).setIsr(new int[] {4, 5, 2}).
              setDirectories(new Uuid[]{
                      Uuid.fromString("gR9P3R9NQ5GhtewattwuZw"),
                      Uuid.fromString("vzgieGUjSr6vPvl3ZAWQcg"),
                      Uuid.fromString("8UWF5CQfQDqSyzcChmbrgw"),
                      Uuid.fromString("X3J9b4K5TumAM5a3YOKk2w"),
                      Uuid.fromString("LjZGhHfFRSCSCQw42dLlNA")
              }).
              setAddingReplicas(new int[]{4, 5}).setLeader(3).setLeaderRecoveryState(LeaderRecoveryState.RECOVERED).setLeaderEpoch(100).setPartitionEpoch(200).build();
          PartitionReassignmentRevert revert = new PartitionReassignmentRevert(registration);
          assertEquals(List.of(3, 2, 1), revert.replicas());
          assertEquals(List.of(2), revert.isr());
          assertFalse(revert.unclean());
      }
  
      @Test
      public void testSomeRemovingAndAdding() {
          PartitionRegistration registration = new PartitionRegistration.Builder().
              setReplicas(new int[] {4, 5, 3, 2, 1}).setIsr(new int[] {4, 5, 2}).
              setDirectories(new Uuid[]{
                  Uuid.fromString("IHR5DKGdQju05pbDpwfdbA"),
                  Uuid.fromString("9zsVmGReTDOAyuPEtp58Cw"),
                  Uuid.fromString("bsUouEfRSLi50Pj3nqke2A"),
                  Uuid.fromString("8l9R5BMcQZGbICOXPmxZNw"),
                  Uuid.fromString("3n5Gwv8jRMiIFMgoTxVCdA")
              }).
              setRemovingReplicas(new int[]{2}).setAddingReplicas(new int[]{4, 5}).setLeader(3).setLeaderRecoveryState(LeaderRecoveryState.RECOVERED).setLeaderEpoch(100).setPartitionEpoch(200).build();
          PartitionReassignmentRevert revert = new PartitionReassignmentRevert(registration);
          assertEquals(List.of(3, 2, 1), revert.replicas());
          assertEquals(List.of(2), revert.isr());
          assertFalse(revert.unclean());
      }
  
      @Test
      public void testIsrSpecialCase() {
          PartitionRegistration registration = new PartitionRegistration.Builder().
              setReplicas(new int[] {4, 5, 3, 2, 1}).setIsr(new int[] {4, 5}).
              setDirectories(new Uuid[]{
                      Uuid.fromString("1oXnuHL6T8y7yMtEP4FSdg"),
                      Uuid.fromString("3ddu6izxT2aCpQrA3C2bjw"),
                      Uuid.fromString("WvCpqmaZTaSbifd43Vl2Xg"),
                      Uuid.fromString("n0cmj6NgTaahRMwa75FnRA"),
                      Uuid.fromString("S2mDcyiAQAe92ZrlyodaDw")
              }).
              setRemovingReplicas(new int[]{2}).setAddingReplicas(new int[]{4, 5}).setLeader(3).setLeaderRecoveryState(LeaderRecoveryState.RECOVERED).setLeaderEpoch(100).setPartitionEpoch(200).build();
          PartitionReassignmentRevert revert = new PartitionReassignmentRevert(registration);
          assertEquals(List.of(3, 2, 1), revert.replicas());
          assertEquals(List.of(3), revert.isr());
          assertTrue(revert.unclean());
      }
  }
  