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.topics;
  
  import org.apache.kafka.common.errors.StreamsInvalidTopologyException;
  import org.apache.kafka.common.utils.LogContext;
  import org.apache.kafka.coordinator.group.generated.StreamsGroupTopologyValue.Subtopology;
  import org.apache.kafka.coordinator.group.generated.StreamsGroupTopologyValue.TopicConfig;
  import org.apache.kafka.coordinator.group.generated.StreamsGroupTopologyValue.TopicInfo;
  
  import org.junit.jupiter.api.Test;
  
  import java.util.List;
  import java.util.Map;
  import java.util.OptionalInt;
  
  import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  public class ChangelogTopicsTest {
  
      private static final LogContext LOG_CONTEXT = new LogContext();
      private static final String SOURCE_TOPIC_NAME = "source";
      private static final String SINK_TOPIC_NAME = "sink";
      private static final String REPARTITION_TOPIC_NAME = "repartition";
      private static final String CHANGELOG_TOPIC_NAME1 = "changelog1";
      private static final TopicConfig TOPIC_CONFIG = new TopicConfig().setKey("config1").setValue("val1");
      private static final TopicInfo REPARTITION_TOPIC_INFO = new TopicInfo()
          .setName(REPARTITION_TOPIC_NAME)
          .setTopicConfigs(List.of(TOPIC_CONFIG));
      private static final Subtopology SUBTOPOLOGY_NO_SOURCE = new Subtopology()
          .setSubtopologyId("SUBTOPOLOGY_NO_SOURCE")
          .setSourceTopics(List.of())
          .setRepartitionSinkTopics(List.of(SINK_TOPIC_NAME))
          .setRepartitionSourceTopics(List.of(REPARTITION_TOPIC_INFO))
          .setStateChangelogTopics(List.of());
      private static final Subtopology SUBTOPOLOGY_NO_REPARTITION_SOURCE = new Subtopology()
          .setSubtopologyId("SUBTOPOLOGY_NO_SOURCE")
          .setSourceTopics(List.of(SOURCE_TOPIC_NAME))
          .setRepartitionSinkTopics(List.of(SINK_TOPIC_NAME))
          .setRepartitionSourceTopics(List.of())
          .setStateChangelogTopics(List.of());
      private static final Subtopology SUBTOPOLOGY_NO_SOURCE_NO_REPARTITION_SOURCE = new Subtopology()
          .setSubtopologyId("SUBTOPOLOGY_NO_SOURCE")
          .setSourceTopics(List.of())
          .setRepartitionSinkTopics(List.of(SINK_TOPIC_NAME))
          .setRepartitionSourceTopics(List.of())
          .setStateChangelogTopics(List.of());
      private static final Subtopology SUBTOPOLOGY_STATELESS = new Subtopology()
          .setSubtopologyId("SUBTOPOLOGY_STATELESS")
          .setSourceTopics(List.of(SOURCE_TOPIC_NAME))
          .setRepartitionSinkTopics(List.of(SINK_TOPIC_NAME))
          .setRepartitionSourceTopics(List.of(REPARTITION_TOPIC_INFO))
          .setStateChangelogTopics(List.of());
      private static final TopicInfo SOURCE_CHANGELOG_TOPIC_CONFIG = new TopicInfo()
          .setName(SOURCE_TOPIC_NAME)
          .setTopicConfigs(List.of(TOPIC_CONFIG));
      private static final Subtopology SUBTOPOLOGY_SOURCE_CHANGELOG = new Subtopology()
          .setSubtopologyId("SUBTOPOLOGY_SOURCE_CHANGELOG")
          .setSourceTopics(List.of(SOURCE_TOPIC_NAME))
          .setRepartitionSinkTopics(List.of(SINK_TOPIC_NAME))
          .setRepartitionSourceTopics(List.of(REPARTITION_TOPIC_INFO))
          .setStateChangelogTopics(List.of(SOURCE_CHANGELOG_TOPIC_CONFIG));
      private static final TopicInfo CHANGELOG_TOPIC_CONFIG = new TopicInfo()
          .setName(CHANGELOG_TOPIC_NAME1)
          .setTopicConfigs(List.of(TOPIC_CONFIG));
      private static final Subtopology SUBTOPOLOGY_STATEFUL = new Subtopology()
          .setSubtopologyId("SUBTOPOLOGY_STATEFUL")
          .setSourceTopics(List.of(SOURCE_TOPIC_NAME))
          .setRepartitionSinkTopics(List.of(SINK_TOPIC_NAME))
          .setRepartitionSourceTopics(List.of(REPARTITION_TOPIC_INFO))
          .setStateChangelogTopics(List.of(CHANGELOG_TOPIC_CONFIG));
      private static final Subtopology SUBTOPOLOGY_BOTH = new Subtopology()
          .setSubtopologyId("SUBTOPOLOGY_BOTH")
          .setSourceTopics(List.of(SOURCE_TOPIC_NAME))
          .setRepartitionSinkTopics(List.of(SINK_TOPIC_NAME))
          .setRepartitionSourceTopics(List.of(REPARTITION_TOPIC_INFO))
          .setStateChangelogTopics(List.of(SOURCE_CHANGELOG_TOPIC_CONFIG, CHANGELOG_TOPIC_CONFIG));
  
      private static OptionalInt topicPartitionProvider(String s) {
          return OptionalInt.of(3);
      }
  
      @Test
      public void shouldFailIfNoSourceTopicsAndNoRepartitionSourceTopics() {
          final List<Subtopology> subtopologies = List.of(SUBTOPOLOGY_NO_SOURCE_NO_REPARTITION_SOURCE);
  
          final ChangelogTopics changelogTopics =
              new ChangelogTopics(LOG_CONTEXT, subtopologies, ChangelogTopicsTest::topicPartitionProvider);
          StreamsInvalidTopologyException e = assertThrows(StreamsInvalidTopologyException.class, changelogTopics::setup);
  
          assertTrue(e.getMessage().contains("No source topics found for subtopology"));
      }
  
      @Test
      public void shouldNotFailIfOnlySourceTopicsEmpty() {
          final List<Subtopology> subtopologies = List.of(SUBTOPOLOGY_NO_SOURCE);
  
          final ChangelogTopics changelogTopics =
              new ChangelogTopics(LOG_CONTEXT, subtopologies, ChangelogTopicsTest::topicPartitionProvider);
          assertDoesNotThrow(changelogTopics::setup);
      }
  
      @Test
      public void shouldNotFailIfOnlyRepartitionSourceTopicsEmpty() {
          final List<Subtopology> subtopologies = List.of(SUBTOPOLOGY_NO_REPARTITION_SOURCE);
  
          final ChangelogTopics changelogTopics =
              new ChangelogTopics(LOG_CONTEXT, subtopologies, ChangelogTopicsTest::topicPartitionProvider);
          assertDoesNotThrow(changelogTopics::setup);
      }
  
      @Test
      public void shouldNotContainChangelogsForStatelessTasks() {
          final List<Subtopology> subtopologies = List.of(SUBTOPOLOGY_STATELESS);
  
          final ChangelogTopics changelogTopics =
              new ChangelogTopics(LOG_CONTEXT, subtopologies, ChangelogTopicsTest::topicPartitionProvider);
          Map<String, Integer> setup = changelogTopics.setup();
  
          assertEquals(Map.of(), setup);
      }
  
      @Test
      public void shouldContainNonSourceBasedChangelogs() {
          final List<Subtopology> subtopologies = List.of(SUBTOPOLOGY_STATEFUL);
  
          final ChangelogTopics changelogTopics =
              new ChangelogTopics(LOG_CONTEXT, subtopologies, ChangelogTopicsTest::topicPartitionProvider);
          Map<String, Integer> setup = changelogTopics.setup();
  
          assertEquals(Map.of(CHANGELOG_TOPIC_CONFIG.name(), 3), setup);
      }
  
      @Test
      public void shouldContainSourceBasedChangelogs() {
          final List<Subtopology> subtopologies = List.of(SUBTOPOLOGY_SOURCE_CHANGELOG);
  
          final ChangelogTopics changelogTopics =
              new ChangelogTopics(LOG_CONTEXT, subtopologies, ChangelogTopicsTest::topicPartitionProvider);
          Map<String, Integer> setup = changelogTopics.setup();
  
          assertEquals(Map.of(SOURCE_TOPIC_NAME, 3), setup);
      }
  
      @Test
      public void shouldContainBothTypesOfPreExistingChangelogs() {
          final List<Subtopology> subtopologies = List.of(SUBTOPOLOGY_BOTH);
  
          final ChangelogTopics changelogTopics =
              new ChangelogTopics(LOG_CONTEXT, subtopologies, ChangelogTopicsTest::topicPartitionProvider);
          Map<String, Integer> setup = changelogTopics.setup();
  
          assertEquals(Map.of(CHANGELOG_TOPIC_CONFIG.name(), 3, SOURCE_TOPIC_NAME, 3), setup);
      }
  }
  