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   * 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.state.internals;
  
  import org.apache.kafka.clients.consumer.ConsumerRecord;
  import org.apache.kafka.common.header.internals.RecordHeaders;
  import org.apache.kafka.common.metrics.Metrics;
  import org.apache.kafka.common.serialization.Serde;
  import org.apache.kafka.common.serialization.Serdes;
  import org.apache.kafka.common.utils.Bytes;
  import org.apache.kafka.common.utils.LogContext;
  import org.apache.kafka.streams.processor.internals.MockStreamsMetrics;
  import org.apache.kafka.streams.processor.internals.ProcessorRecordContext;
  import org.apache.kafka.test.InternalMockProcessorContext;
  import org.apache.kafka.test.MockRecordCollector;
  import org.apache.kafka.test.TestUtils;
  
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.rocksdb.WriteBatch;
  
  import java.io.File;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Map;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  
  class RocksDBTimeOrderedKeyValueBytesStoreTest {
  
      private InternalMockProcessorContext<?, ?> context;
      private RocksDBTimeOrderedKeyValueBytesStore bytesStore;
      private File stateDir;
      final String storeName = "bytes-store";
      private static final String METRICS_SCOPE = "metrics-scope";
      private final String topic = "changelog";
  
  
      @BeforeEach
      public void before() {
          bytesStore = new RocksDBTimeOrderedKeyValueBytesStore(storeName, METRICS_SCOPE);
  
          stateDir = TestUtils.tempDirectory();
          context = new InternalMockProcessorContext<>(
              stateDir,
              Serdes.String(),
              Serdes.Long(),
              new MockRecordCollector(),
              new ThreadCache(new LogContext("testCache "), 0, new MockStreamsMetrics(new Metrics()))
          );
          bytesStore.init(context, bytesStore);
      }
  
      @AfterEach
      public void close() {
          bytesStore.close();
      }
  
      @Test
      public void shouldCreateWriteBatches() {
          final String key = "a";
          final Collection<ConsumerRecord<byte[], byte[]>> records = new ArrayList<>();
          records.add(new ConsumerRecord<>("", 0, 0L, serializeKey(key, 0, 0L).get(), serializeValue(50L)));
          records.add(new ConsumerRecord<>("", 0, 0L, serializeKey(key, 1, 1L).get(), serializeValue(100L)));
          final Map<KeyValueSegment, WriteBatch> writeBatchMap = bytesStore.getWriteBatches(records);
          assertEquals(1, writeBatchMap.size());
  
          for (final WriteBatch batch : writeBatchMap.values()) {
              assertEquals(2, batch.count());
          }
      }
  
      @Test
      public void shouldCreateEmptyWriteBatches() {
          final Collection<ConsumerRecord<byte[], byte[]>> records = new ArrayList<>();
          final Map<KeyValueSegment, WriteBatch> writeBatchMap = bytesStore.getWriteBatches(records);
          assertEquals(0, writeBatchMap.size());
      }
  
      @SuppressWarnings("resource")
      private byte[] serializeValue(final Long value) {
          final Serde<Long> valueSerde = new Serdes.LongSerde();
          final byte[] valueBytes = valueSerde.serializer().serialize(topic, value);
          final BufferValue buffered = new BufferValue(null, null, valueBytes, new ProcessorRecordContext(0, 0, 0, topic, new RecordHeaders()));
          return buffered.serialize(0).array();
      }
  
      @SuppressWarnings("resource")
      private Bytes serializeKey(final String key, final int seqnum, final long timestamp) {
          final Serde<String> keySerde = new Serdes.StringSerde();
          return Bytes.wrap(
              PrefixedWindowKeySchemas.TimeFirstWindowKeySchema.toStoreKeyBinary(keySerde.serializer().serialize(topic, key),
                  timestamp,
                  seqnum).get());
      }
  }
  