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.connect.runtime;
  
  import org.apache.kafka.common.config.ConfigException;
  
  import org.junit.jupiter.api.Test;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Objects;
  import java.util.concurrent.TimeUnit;
  import java.util.stream.Collectors;
  
  import static org.apache.kafka.common.config.TopicConfig.CLEANUP_POLICY_COMPACT;
  import static org.apache.kafka.common.config.TopicConfig.CLEANUP_POLICY_CONFIG;
  import static org.apache.kafka.common.config.TopicConfig.COMPRESSION_TYPE_CONFIG;
  import static org.apache.kafka.common.config.TopicConfig.RETENTION_MS_CONFIG;
  import static org.apache.kafka.connect.runtime.ConnectorConfig.CONNECTOR_CLASS_CONFIG;
  import static org.apache.kafka.connect.runtime.ConnectorConfig.NAME_CONFIG;
  import static org.apache.kafka.connect.runtime.ConnectorConfigTest.MOCK_PLUGINS;
  import static org.apache.kafka.connect.runtime.SourceConnectorConfig.TOPIC_CREATION_GROUPS_CONFIG;
  import static org.apache.kafka.connect.runtime.TopicCreationConfig.DEFAULT_TOPIC_CREATION_GROUP;
  import static org.apache.kafka.connect.runtime.TopicCreationConfig.DEFAULT_TOPIC_CREATION_PREFIX;
  import static org.apache.kafka.connect.runtime.TopicCreationConfig.PARTITIONS_CONFIG;
  import static org.apache.kafka.connect.runtime.TopicCreationConfig.REPLICATION_FACTOR_CONFIG;
  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 SourceConnectorConfigTest {
  
      private static final String FOO_CONNECTOR = "foo-source";
      private static final String TOPIC_CREATION_GROUP_1 = "group1";
      private static final String TOPIC_CREATION_GROUP_2 = "group2";
      private static final short DEFAULT_REPLICATION_FACTOR = -1;
      private static final int DEFAULT_PARTITIONS = -1;
  
      public Map<String, String> defaultConnectorProps() {
          Map<String, String> props = new HashMap<>();
          props.put(NAME_CONFIG, FOO_CONNECTOR);
          props.put(CONNECTOR_CLASS_CONFIG, ConnectorConfigTest.TestConnector.class.getName());
          return props;
      }
  
      public Map<String, String> defaultConnectorPropsWithTopicCreation() {
          Map<String, String> props = defaultConnectorProps();
          props.put(DEFAULT_TOPIC_CREATION_PREFIX + REPLICATION_FACTOR_CONFIG, String.valueOf(DEFAULT_REPLICATION_FACTOR));
          props.put(DEFAULT_TOPIC_CREATION_PREFIX + PARTITIONS_CONFIG, String.valueOf(DEFAULT_PARTITIONS));
          return props;
      }
  
      @Test
      public void shouldNotFailWithExplicitlySpecifiedDefaultTopicCreationGroup() {
          Map<String, String> props = defaultConnectorProps();
          props.put(TOPIC_CREATION_GROUPS_CONFIG, String.join(",", DEFAULT_TOPIC_CREATION_GROUP,
              TOPIC_CREATION_GROUP_1, TOPIC_CREATION_GROUP_2));
          props.put(DEFAULT_TOPIC_CREATION_PREFIX + REPLICATION_FACTOR_CONFIG, "1");
          props.put(DEFAULT_TOPIC_CREATION_PREFIX + PARTITIONS_CONFIG, "1");
          new SourceConnectorConfig(MOCK_PLUGINS, props, true);
      }
  
      @Test
      public void noTopicCreation() {
          Map<String, String> props = defaultConnectorProps();
          SourceConnectorConfig config = new SourceConnectorConfig(MOCK_PLUGINS, props, false);
          assertFalse(config.usesTopicCreation());
      }
  
      @Test
      public void shouldNotAllowZeroPartitionsOrReplicationFactor() {
          Map<String, String> props = defaultConnectorPropsWithTopicCreation();
          props.put(DEFAULT_TOPIC_CREATION_PREFIX + PARTITIONS_CONFIG, String.valueOf(0));
          Exception e = assertThrows(ConfigException.class, () -> new SourceConnectorConfig(MOCK_PLUGINS, props, true));
          assertTrue(e.getMessage().contains("Number of partitions must be positive, or -1"));
  
          props.put(DEFAULT_TOPIC_CREATION_PREFIX + PARTITIONS_CONFIG, String.valueOf(DEFAULT_PARTITIONS));
          props.put(DEFAULT_TOPIC_CREATION_PREFIX + REPLICATION_FACTOR_CONFIG, String.valueOf(0));
  
          e = assertThrows(ConfigException.class, () -> new SourceConnectorConfig(MOCK_PLUGINS, props, true));
          assertTrue(e.getMessage().contains("Replication factor must be positive and not "
                  + "larger than the number of brokers in the Kafka cluster, or -1 to use the "
                  + "broker's default"));
      }
  
      @Test
      public void shouldNotAllowPartitionsOrReplicationFactorLessThanNegativeOne() {
          Map<String, String> props = defaultConnectorPropsWithTopicCreation();
          for (int i = -2; i > -100; --i) {
              props.put(DEFAULT_TOPIC_CREATION_PREFIX + PARTITIONS_CONFIG, String.valueOf(i));
              props.put(DEFAULT_TOPIC_CREATION_PREFIX + REPLICATION_FACTOR_CONFIG, String.valueOf(DEFAULT_REPLICATION_FACTOR));
              Exception e = assertThrows(ConfigException.class, () -> new SourceConnectorConfig(MOCK_PLUGINS, props, true));
              assertTrue(e.getMessage().contains("Number of partitions must be positive, or -1"));
  
              props.put(DEFAULT_TOPIC_CREATION_PREFIX + PARTITIONS_CONFIG, String.valueOf(DEFAULT_PARTITIONS));
              props.put(DEFAULT_TOPIC_CREATION_PREFIX + REPLICATION_FACTOR_CONFIG, String.valueOf(i));
              e = assertThrows(ConfigException.class, () -> new SourceConnectorConfig(MOCK_PLUGINS, props, true));
              assertTrue(e.getMessage().contains("Replication factor must be positive and not "
                      + "larger than the number of brokers in the Kafka cluster, or -1 to use the "
                      + "broker's default"));
          }
      }
  
      @Test
      public void shouldAllowNegativeOneAndPositiveForReplicationFactor() {
          Map<String, String> props = defaultConnectorPropsWithTopicCreation();
          SourceConnectorConfig config = new SourceConnectorConfig(MOCK_PLUGINS, props, true);
          assertTrue(config.usesTopicCreation());
  
          for (int i = 1; i <= 100; ++i) {
              props.put(DEFAULT_TOPIC_CREATION_PREFIX + PARTITIONS_CONFIG, String.valueOf(i));
              props.put(DEFAULT_TOPIC_CREATION_PREFIX + REPLICATION_FACTOR_CONFIG, String.valueOf(DEFAULT_REPLICATION_FACTOR));
              config = new SourceConnectorConfig(MOCK_PLUGINS, props, true);
              assertTrue(config.usesTopicCreation());
  
              props.put(DEFAULT_TOPIC_CREATION_PREFIX + PARTITIONS_CONFIG, String.valueOf(DEFAULT_PARTITIONS));
              props.put(DEFAULT_TOPIC_CREATION_PREFIX + REPLICATION_FACTOR_CONFIG, String.valueOf(i));
              config = new SourceConnectorConfig(MOCK_PLUGINS, props, true);
              assertTrue(config.usesTopicCreation());
          }
      }
  
      @Test
      public void shouldAllowSettingTopicProperties() {
          Map<String, String> topicProps = new HashMap<>();
          topicProps.put(CLEANUP_POLICY_CONFIG, CLEANUP_POLICY_COMPACT);
          topicProps.put(COMPRESSION_TYPE_CONFIG, "lz4");
          topicProps.put(RETENTION_MS_CONFIG, String.valueOf(TimeUnit.DAYS.toMillis(30)));
  
          Map<String, String> props = defaultConnectorPropsWithTopicCreation();
          topicProps.forEach((k, v) -> props.put(DEFAULT_TOPIC_CREATION_PREFIX + k, v));
  
          SourceConnectorConfig config = new SourceConnectorConfig(MOCK_PLUGINS, props, true);
          assertEquals(topicProps,
                  convertToStringValues(config.topicCreationOtherConfigs(DEFAULT_TOPIC_CREATION_GROUP)));
      }
  
      private static Map<String, String> convertToStringValues(Map<String, Object> config) {
          // null values are not allowed
          return config.entrySet().stream()
                  .collect(Collectors.toMap(Map.Entry::getKey, e -> {
                      Objects.requireNonNull(e.getValue());
                      return e.getValue().toString();
                  }));
      }
  }
  