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.streams.kstream.internals;
  
  import org.apache.kafka.common.serialization.Serdes;
  import org.apache.kafka.common.utils.LogCaptureAppender;
  import org.apache.kafka.common.utils.LogCaptureAppender.Event;
  import org.apache.kafka.streams.StreamsBuilder;
  import org.apache.kafka.streams.StreamsConfig;
  import org.apache.kafka.streams.kstream.Consumed;
  import org.apache.kafka.streams.processor.api.MockProcessorContext;
  import org.apache.kafka.streams.processor.api.Processor;
  import org.apache.kafka.streams.processor.api.Record;
  import org.apache.kafka.test.StreamsTestUtils;
  
  import org.junit.jupiter.api.Test;
  
  import java.util.Properties;
  import java.util.stream.Collectors;
  
  import static org.hamcrest.CoreMatchers.hasItem;
  import static org.hamcrest.MatcherAssert.assertThat;
  
  public class KTableKTableRightJoinTest {
  
      private final Properties props = StreamsTestUtils.getStreamsConfig(Serdes.String(), Serdes.String());
  
      @Test
      public void shouldLogAndMeterSkippedRecordsDueToNullLeftKeyWithBuiltInMetricsVersionLatest() {
          final StreamsBuilder builder = new StreamsBuilder();
  
          @SuppressWarnings("unchecked")
          final Processor<String, Change<String>, String, Change<Object>> join = new KTableKTableRightJoin<>(
              (KTableImpl<String, String, String>) builder.table("left", Consumed.with(Serdes.String(), Serdes.String())),
              (KTableImpl<String, String, String>) builder.table("right", Consumed.with(Serdes.String(), Serdes.String())),
              null
          ).get();
  
          props.setProperty(StreamsConfig.BUILT_IN_METRICS_VERSION_CONFIG, StreamsConfig.METRICS_LATEST);
          final MockProcessorContext<String, Change<Object>> context = new MockProcessorContext<>(props);
          context.setRecordMetadata("left", -1, -2);
          join.init(context);
  
          try (final LogCaptureAppender appender = LogCaptureAppender.createAndRegister(KTableKTableRightJoin.class)) {
              join.process(new Record<>(null, new Change<>("new", "old"), 0));
  
              assertThat(
                  appender.getEvents().stream()
                      .filter(e -> e.getLevel().equals("WARN"))
                      .map(Event::getMessage)
                      .collect(Collectors.toList()),
                  hasItem("Skipping record due to null key. topic=[left] partition=[-1] offset=[-2]")
              );
          }
      }
  }
  