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.streams;
  
  import org.apache.kafka.common.Uuid;
  import org.apache.kafka.coordinator.group.MetadataImageBuilder;
  import org.apache.kafka.coordinator.group.streams.topics.ConfiguredInternalTopic;
  import org.apache.kafka.coordinator.group.streams.topics.ConfiguredSubtopology;
  import org.apache.kafka.image.MetadataImage;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import java.util.List;
  import java.util.Map;
  import java.util.NoSuchElementException;
  import java.util.SortedMap;
  import java.util.TreeMap;
  
  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;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  
  class TopologyMetadataTest {
  
      private MetadataImage metadataImage;
      private SortedMap<String, ConfiguredSubtopology> subtopologyMap;
      private TopologyMetadata topologyMetadata;
  
      @BeforeEach
      void setUp() {
          metadataImage = new MetadataImageBuilder()
              .addTopic(Uuid.randomUuid(), "source_topic", 3)
              .addTopic(Uuid.randomUuid(), "repartition_source_topic", 4)
              .build();
          subtopologyMap = new TreeMap<>();
          topologyMetadata = new TopologyMetadata(metadataImage, subtopologyMap);
      }
  
      @Test
      void testMetadataImage() {
          assertEquals(metadataImage, topologyMetadata.metadataImage());
      }
  
      @Test
      void testTopology() {
          assertEquals(subtopologyMap, topologyMetadata.subtopologyMap());
      }
  
      @Test
      void testIsStateful() {
          ConfiguredInternalTopic internalTopic = mock(ConfiguredInternalTopic.class);
          ConfiguredSubtopology subtopology1 = mock(ConfiguredSubtopology.class);
          ConfiguredSubtopology subtopology2 = mock(ConfiguredSubtopology.class);
          subtopologyMap.put("subtopology1", subtopology1);
          subtopologyMap.put("subtopology2", subtopology2);
          when(subtopology1.stateChangelogTopics()).thenReturn(Map.of("state_changelog_topic", internalTopic));
          when(subtopology2.stateChangelogTopics()).thenReturn(Map.of());
  
          assertTrue(topologyMetadata.isStateful("subtopology1"));
          assertFalse(topologyMetadata.isStateful("subtopology2"));
      }
  
      @Test
      void testMaxNumInputPartitions() {
          ConfiguredSubtopology subtopology = mock(ConfiguredSubtopology.class);
          subtopologyMap.put("subtopology1", subtopology);
          when(subtopology.numberOfTasks()).thenReturn(4);
  
          assertEquals(4, topologyMetadata.maxNumInputPartitions("subtopology1"));
      }
  
      @Test
      void testSubtopologies() {
          ConfiguredSubtopology subtopology1 = mock(ConfiguredSubtopology.class);
          ConfiguredSubtopology subtopology2 = mock(ConfiguredSubtopology.class);
          subtopologyMap.put("subtopology1", subtopology1);
          subtopologyMap.put("subtopology2", subtopology2);
  
          List<String> expectedSubtopologies = List.of("subtopology1", "subtopology2");
          assertEquals(expectedSubtopologies, topologyMetadata.subtopologies());
      }
  
      @Test
      void testIsStatefulThrowsExceptionWhenSubtopologyIdDoesNotExist() {
          assertThrows(NoSuchElementException.class, () -> topologyMetadata.isStateful("non_existent_subtopology"));
      }
  
      @Test
      void testMaxNumInputPartitionsThrowsExceptionWhenSubtopologyIdDoesNotExist() {
          assertThrows(NoSuchElementException.class, () -> topologyMetadata.maxNumInputPartitions("non_existent_subtopology"));
      }
  }
  