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.coordinator.group.assignor;
  
  import org.apache.kafka.common.Uuid;
  import org.apache.kafka.coordinator.group.api.assignor.SubscriptionType;
  import org.apache.kafka.coordinator.group.modern.Assignment;
  import org.apache.kafka.coordinator.group.modern.GroupSpecImpl;
  import org.apache.kafka.coordinator.group.modern.MemberSubscriptionAndAssignmentImpl;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Optional;
  import java.util.Set;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  
  public class GroupSpecImplTest {
      private static final String TEST_MEMBER = "test-member";
      private Map<String, MemberSubscriptionAndAssignmentImpl> members;
      private SubscriptionType subscriptionType;
      private Map<Uuid, Map<Integer, String>> invertedTargetAssignment;
      private GroupSpecImpl groupSpec;
      private Uuid topicId;
  
      @BeforeEach
      void setUp() {
          members = new HashMap<>();
          subscriptionType = SubscriptionType.HOMOGENEOUS;
          invertedTargetAssignment = new HashMap<>();
          topicId = Uuid.randomUuid();
  
          members.put(TEST_MEMBER,  new MemberSubscriptionAndAssignmentImpl(
              Optional.empty(),
              Optional.empty(),
              Set.of(topicId),
              Assignment.EMPTY
          ));
  
          groupSpec = new GroupSpecImpl(
              members,
              subscriptionType,
              invertedTargetAssignment
          );
      }
  
      @Test
      void testMemberIds() {
          assertEquals(members.keySet(), groupSpec.memberIds());
      }
  
      @Test
      void testSubscriptionType() {
          assertEquals(subscriptionType, groupSpec.subscriptionType());
      }
  
      @Test
      void testIsPartitionAssigned() {
          Map<Integer, String> partitionMap = new HashMap<>();
          partitionMap.put(1, "test-member");
          invertedTargetAssignment.put(topicId, partitionMap);
  
          assertTrue(groupSpec.isPartitionAssigned(topicId, 1));
          assertFalse(groupSpec.isPartitionAssigned(topicId, 2));
          assertFalse(groupSpec.isPartitionAssigned(Uuid.randomUuid(), 2));
      }
  
      @Test
      void testMemberSubscription() {
          assertEquals(members.get(TEST_MEMBER), groupSpec.memberSubscription(TEST_MEMBER));
          assertThrows(IllegalArgumentException.class, () -> groupSpec.memberSubscription("unknown-member"));
      }
  
      @Test
      void testMemberAssignment() {
          Map<Uuid, Set<Integer>> topicPartitions = new HashMap<>();
          topicPartitions.put(
              topicId,
              Set.of(0, 1)
          );
          members.put(TEST_MEMBER, new MemberSubscriptionAndAssignmentImpl(
              Optional.empty(),
              Optional.empty(),
              Set.of(topicId),
              new Assignment(topicPartitions)
          ));
  
          assertEquals(topicPartitions, groupSpec.memberAssignment(TEST_MEMBER).partitions());
          assertEquals(Map.of(), groupSpec.memberAssignment("unknown-member").partitions());
      }
  
      @Test
      void testIsPartitionAssignable() {
          // Empty allowed map.
          assertTrue(groupSpec.isPartitionAssignable(topicId, 1));
  
          // Allowed map with data.
          groupSpec = new GroupSpecImpl(
              members,
              subscriptionType,
              invertedTargetAssignment,
              Optional.of(Map.of(topicId, Set.of(0)))
          );
  
          assertTrue(groupSpec.isPartitionAssignable(topicId, 0));
          assertFalse(groupSpec.isPartitionAssignable(topicId, 1));
      }
  }
  