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.clients.admin.internals;
  
  import org.apache.kafka.clients.admin.internals.AdminApiHandler.ApiResult;
  import org.apache.kafka.clients.consumer.OffsetAndMetadata;
  import org.apache.kafka.common.Node;
  import org.apache.kafka.common.TopicPartition;
  import org.apache.kafka.common.protocol.Errors;
  import org.apache.kafka.common.requests.OffsetCommitRequest;
  import org.apache.kafka.common.requests.OffsetCommitResponse;
  import org.apache.kafka.common.utils.LogContext;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Map;
  
  import static java.util.Collections.emptyList;
  import static java.util.Collections.emptyMap;
  import static java.util.Collections.emptySet;
  import static java.util.Collections.singleton;
  import static java.util.Collections.singletonList;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class AlterConsumerGroupOffsetsHandlerTest {
  
      private final LogContext logContext = new LogContext();
      private final String groupId = "group-id";
      private final TopicPartition t0p0 = new TopicPartition("t0", 0);
      private final TopicPartition t0p1 = new TopicPartition("t0", 1);
      private final TopicPartition t1p0 = new TopicPartition("t1", 0);
      private final TopicPartition t1p1 = new TopicPartition("t1", 1);
      private final Map<TopicPartition, OffsetAndMetadata> partitions = new HashMap<>();
      private final long offset = 1L;
      private final Node node = new Node(1, "host", 1234);
  
      @BeforeEach
      public void setUp() {
          partitions.put(t0p0, new OffsetAndMetadata(offset));
          partitions.put(t0p1, new OffsetAndMetadata(offset));
          partitions.put(t1p0, new OffsetAndMetadata(offset));
          partitions.put(t1p1, new OffsetAndMetadata(offset));
      }
  
      @Test
      public void testBuildRequest() {
          AlterConsumerGroupOffsetsHandler handler = new AlterConsumerGroupOffsetsHandler(groupId, partitions, logContext);
          OffsetCommitRequest request = handler.buildBatchedRequest(-1, singleton(CoordinatorKey.byGroupId(groupId))).build();
          assertEquals(groupId, request.data().groupId());
          assertEquals(2, request.data().topics().size());
          assertEquals(2, request.data().topics().get(0).partitions().size());
          assertEquals(offset, request.data().topics().get(0).partitions().get(0).committedOffset());
      }
  
      @Test
      public void testHandleSuccessfulResponse() {
          AlterConsumerGroupOffsetsHandler handler = new AlterConsumerGroupOffsetsHandler(groupId, partitions, logContext);
          Map<TopicPartition, Errors> responseData = Collections.singletonMap(t0p0, Errors.NONE);
          OffsetCommitResponse response = new OffsetCommitResponse(0, responseData);
          ApiResult<CoordinatorKey, Map<TopicPartition, Errors>> result = handler.handleResponse(node, singleton(CoordinatorKey.byGroupId(groupId)), response);
          assertCompleted(result, responseData);
      }
  
      @Test
      public void testHandleRetriableResponse() {
          assertUnmappedKey(partitionErrors(Errors.NOT_COORDINATOR));
          assertUnmappedKey(partitionErrors(Errors.COORDINATOR_NOT_AVAILABLE));
          assertRetriableError(partitionErrors(Errors.COORDINATOR_LOAD_IN_PROGRESS));
          assertRetriableError(partitionErrors(Errors.REBALANCE_IN_PROGRESS));
      }
  
      @Test
      public void testHandleErrorResponse() {
          assertFatalError(partitionErrors(Errors.TOPIC_AUTHORIZATION_FAILED));
          assertFatalError(partitionErrors(Errors.GROUP_AUTHORIZATION_FAILED));
          assertFatalError(partitionErrors(Errors.INVALID_GROUP_ID));
          assertFatalError(partitionErrors(Errors.UNKNOWN_TOPIC_OR_PARTITION));
          assertFatalError(partitionErrors(Errors.OFFSET_METADATA_TOO_LARGE));
          assertFatalError(partitionErrors(Errors.ILLEGAL_GENERATION));
          assertFatalError(partitionErrors(Errors.UNKNOWN_MEMBER_ID));
          assertFatalError(partitionErrors(Errors.INVALID_COMMIT_OFFSET_SIZE));
          assertFatalError(partitionErrors(Errors.UNKNOWN_SERVER_ERROR));
      }
  
      @Test
      public void testHandleMultipleErrorsResponse() {
          Map<TopicPartition, Errors> partitionErrors = new HashMap<>();
          partitionErrors.put(t0p0, Errors.UNKNOWN_TOPIC_OR_PARTITION);
          partitionErrors.put(t0p1, Errors.INVALID_COMMIT_OFFSET_SIZE);
          partitionErrors.put(t1p0, Errors.TOPIC_AUTHORIZATION_FAILED);
          partitionErrors.put(t1p1, Errors.OFFSET_METADATA_TOO_LARGE);
          assertFatalError(partitionErrors);
      }
  
      private AdminApiHandler.ApiResult<CoordinatorKey, Map<TopicPartition, Errors>> handleResponse(
          CoordinatorKey groupKey,
          Map<TopicPartition, OffsetAndMetadata> partitions,
          Map<TopicPartition, Errors> partitionResults
      ) {
          AlterConsumerGroupOffsetsHandler handler =
              new AlterConsumerGroupOffsetsHandler(groupKey.idValue, partitions, logContext);
          OffsetCommitResponse response = new OffsetCommitResponse(0, partitionResults);
          return handler.handleResponse(node, singleton(groupKey), response);
      }
  
      private Map<TopicPartition, Errors> partitionErrors(
          Errors error
      ) {
          Map<TopicPartition, Errors> partitionErrors = new HashMap<>();
          partitions.keySet().forEach(partition ->
              partitionErrors.put(partition, error)
          );
          return partitionErrors;
      }
  
      private void assertFatalError(
          Map<TopicPartition, Errors> partitionResults
      ) {
          CoordinatorKey groupKey = CoordinatorKey.byGroupId(groupId);
          AdminApiHandler.ApiResult<CoordinatorKey, Map<TopicPartition, Errors>> result = handleResponse(
              groupKey,
              partitions,
              partitionResults
          );
  
          assertEquals(singleton(groupKey), result.completedKeys.keySet());
          assertEquals(partitionResults, result.completedKeys.get(groupKey));
          assertEquals(emptyList(), result.unmappedKeys);
          assertEquals(emptyMap(), result.failedKeys);
      }
  
      private void assertRetriableError(
          Map<TopicPartition, Errors> partitionResults
      ) {
          CoordinatorKey groupKey = CoordinatorKey.byGroupId(groupId);
          AdminApiHandler.ApiResult<CoordinatorKey, Map<TopicPartition, Errors>> result = handleResponse(
              groupKey,
              partitions,
              partitionResults
          );
  
          assertEquals(emptySet(), result.completedKeys.keySet());
          assertEquals(emptyList(), result.unmappedKeys);
          assertEquals(emptyMap(), result.failedKeys);
      }
  
      private void assertUnmappedKey(
          Map<TopicPartition, Errors> partitionResults
      ) {
          CoordinatorKey groupKey = CoordinatorKey.byGroupId(groupId);
          AdminApiHandler.ApiResult<CoordinatorKey, Map<TopicPartition, Errors>> result = handleResponse(
              groupKey,
              partitions,
              partitionResults
          );
  
          assertEquals(emptySet(), result.completedKeys.keySet());
          assertEquals(emptySet(), result.failedKeys.keySet());
          assertEquals(singletonList(CoordinatorKey.byGroupId(groupId)), result.unmappedKeys);
      }
  
      private void assertCompleted(
          AdminApiHandler.ApiResult<CoordinatorKey, Map<TopicPartition, Errors>> result,
          Map<TopicPartition, Errors> expected
      ) {
          CoordinatorKey key = CoordinatorKey.byGroupId(groupId);
          assertEquals(emptySet(), result.failedKeys.keySet());
          assertEquals(emptyList(), result.unmappedKeys);
          assertEquals(singleton(key), result.completedKeys.keySet());
          assertEquals(expected, result.completedKeys.get(key));
      }
  }
  