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.common.message.MetadataResponseData;
  import org.apache.kafka.common.protocol.ApiKeys;
  import org.apache.kafka.common.requests.MetadataRequest;
  import org.apache.kafka.common.requests.MetadataResponse;
  import org.apache.kafka.common.utils.LogContext;
  
  import org.junit.jupiter.api.Test;
  
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.OptionalInt;
  import java.util.Set;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  class AllBrokersStrategyTest {
      private final LogContext logContext = new LogContext();
  
      @Test
      public void testBuildRequest() {
          AllBrokersStrategy strategy = new AllBrokersStrategy(logContext);
          MetadataRequest.Builder builder = strategy.buildRequest(AllBrokersStrategy.LOOKUP_KEYS);
          assertEquals(Collections.emptyList(), builder.topics());
      }
  
      @Test
      public void testBuildRequestWithInvalidLookupKeys() {
          AllBrokersStrategy strategy = new AllBrokersStrategy(logContext);
          AllBrokersStrategy.BrokerKey key1 = new AllBrokersStrategy.BrokerKey(OptionalInt.empty());
          AllBrokersStrategy.BrokerKey key2 = new AllBrokersStrategy.BrokerKey(OptionalInt.of(1));
          assertThrows(IllegalArgumentException.class, () -> strategy.buildRequest(Set.of(key1)));
          assertThrows(IllegalArgumentException.class, () -> strategy.buildRequest(Set.of(key2)));
          assertThrows(IllegalArgumentException.class, () -> strategy.buildRequest(Set.of(key1, key2)));
  
          Set<AllBrokersStrategy.BrokerKey> keys = new HashSet<>(AllBrokersStrategy.LOOKUP_KEYS);
          keys.add(key2);
          assertThrows(IllegalArgumentException.class, () -> strategy.buildRequest(keys));
      }
  
      @Test
      public void testHandleResponse() {
          AllBrokersStrategy strategy = new AllBrokersStrategy(logContext);
  
          MetadataResponseData response = new MetadataResponseData();
          response.brokers().add(new MetadataResponseData.MetadataResponseBroker()
              .setNodeId(1)
              .setHost("host1")
              .setPort(9092)
          );
          response.brokers().add(new MetadataResponseData.MetadataResponseBroker()
              .setNodeId(2)
              .setHost("host2")
              .setPort(9092)
          );
  
          AdminApiLookupStrategy.LookupResult<AllBrokersStrategy.BrokerKey> lookupResult = strategy.handleResponse(
              AllBrokersStrategy.LOOKUP_KEYS,
              new MetadataResponse(response, ApiKeys.METADATA.latestVersion())
          );
  
          assertEquals(Collections.emptyMap(), lookupResult.failedKeys);
  
          Set<AllBrokersStrategy.BrokerKey> expectedMappedKeys = Set.of(
              new AllBrokersStrategy.BrokerKey(OptionalInt.of(1)),
              new AllBrokersStrategy.BrokerKey(OptionalInt.of(2))
          );
  
          assertEquals(expectedMappedKeys, lookupResult.mappedKeys.keySet());
          lookupResult.mappedKeys.forEach((brokerKey, brokerId) ->
              assertEquals(OptionalInt.of(brokerId), brokerKey.brokerId)
          );
      }
  
      @Test
      public void testHandleResponseWithNoBrokers() {
          AllBrokersStrategy strategy = new AllBrokersStrategy(logContext);
  
          MetadataResponseData response = new MetadataResponseData();
  
          AdminApiLookupStrategy.LookupResult<AllBrokersStrategy.BrokerKey> lookupResult = strategy.handleResponse(
              AllBrokersStrategy.LOOKUP_KEYS,
              new MetadataResponse(response, ApiKeys.METADATA.latestVersion())
          );
  
          assertEquals(Collections.emptyMap(), lookupResult.failedKeys);
          assertEquals(Collections.emptyMap(), lookupResult.mappedKeys);
      }
  
      @Test
      public void testHandleResponseWithInvalidLookupKeys() {
          AllBrokersStrategy strategy = new AllBrokersStrategy(logContext);
          AllBrokersStrategy.BrokerKey key1 = new AllBrokersStrategy.BrokerKey(OptionalInt.empty());
          AllBrokersStrategy.BrokerKey key2 = new AllBrokersStrategy.BrokerKey(OptionalInt.of(1));
          MetadataResponse response = new MetadataResponse(new MetadataResponseData(), ApiKeys.METADATA.latestVersion());
  
          assertThrows(IllegalArgumentException.class, () -> strategy.handleResponse(Set.of(key1), response));
          assertThrows(IllegalArgumentException.class, () -> strategy.handleResponse(Set.of(key2), response));
          assertThrows(IllegalArgumentException.class, () -> strategy.handleResponse(Set.of(key1, key2), response));
  
          Set<AllBrokersStrategy.BrokerKey> keys = new HashSet<>(AllBrokersStrategy.LOOKUP_KEYS);
          keys.add(key2);
          assertThrows(IllegalArgumentException.class, () -> strategy.handleResponse(keys, response));
      }
  
  }
  