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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.common.metrics.Metrics;
  import org.apache.kafka.common.utils.MockTime;
  import org.apache.kafka.streams.processor.TaskId;
  import org.apache.kafka.streams.processor.internals.metrics.StreamsMetricsImpl;
  import org.apache.kafka.streams.query.Position;
  import org.apache.kafka.streams.state.internals.metrics.RocksDBMetricsRecorder;
  import org.apache.kafka.test.TestUtils;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.junit.jupiter.MockitoExtension;
  import org.mockito.junit.jupiter.MockitoSettings;
  import org.mockito.quality.Strictness;
  
  import java.io.File;
  import java.util.HashSet;
  import java.util.Set;
  
  import static org.apache.kafka.common.utils.Utils.mkEntry;
  import static org.apache.kafka.common.utils.Utils.mkMap;
  import static org.apache.kafka.streams.StreamsConfig.METRICS_RECORDING_LEVEL_CONFIG;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.equalTo;
  import static org.hamcrest.Matchers.not;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  @ExtendWith(MockitoExtension.class)
  @MockitoSettings(strictness = Strictness.STRICT_STUBS)
  public class TimestampedSegmentTest {
  
      private final RocksDBMetricsRecorder metricsRecorder =
          new RocksDBMetricsRecorder("metrics-scope", "store-name");
  
      @BeforeEach
      public void setUp() {
          metricsRecorder.init(
              new StreamsMetricsImpl(new Metrics(), "test-client", "processId", new MockTime()),
              new TaskId(0, 0)
          );
      }
  
      @Test
      public void shouldDeleteStateDirectoryOnDestroy() throws Exception {
          final TimestampedSegment segment = new TimestampedSegment("segment", "window", 0L, Position.emptyPosition(), metricsRecorder);
          final String directoryPath = TestUtils.tempDirectory().getAbsolutePath();
          final File directory = new File(directoryPath);
  
          segment.openDB(mkMap(mkEntry(METRICS_RECORDING_LEVEL_CONFIG, "INFO")), directory);
  
          assertTrue(new File(directoryPath, "window").exists());
          assertTrue(new File(directoryPath + File.separator + "window", "segment").exists());
          assertTrue(new File(directoryPath + File.separator + "window", "segment").list().length > 0);
          segment.destroy();
          assertFalse(new File(directoryPath + File.separator + "window", "segment").exists());
          assertTrue(new File(directoryPath, "window").exists());
  
          segment.close();
      }
  
      @Test
      public void shouldBeEqualIfIdIsEqual() {
          final TimestampedSegment segment = new TimestampedSegment("anyName", "anyName", 0L, Position.emptyPosition(), metricsRecorder);
          final TimestampedSegment segmentSameId =
              new TimestampedSegment("someOtherName", "someOtherName", 0L, Position.emptyPosition(), metricsRecorder);
          final TimestampedSegment segmentDifferentId =
              new TimestampedSegment("anyName", "anyName", 1L, Position.emptyPosition(), metricsRecorder);
  
          assertThat(segment, equalTo(segment));
          assertThat(segment, equalTo(segmentSameId));
          assertThat(segment, not(equalTo(segmentDifferentId)));
          assertThat(segment, not(equalTo(null)));
          assertThat(segment, not(equalTo("anyName")));
  
          segment.close();
          segmentSameId.close();
          segmentDifferentId.close();
      }
  
      @Test
      public void shouldHashOnSegmentIdOnly() {
          final TimestampedSegment segment = new TimestampedSegment("anyName", "anyName", 0L, Position.emptyPosition(), metricsRecorder);
          final TimestampedSegment segmentSameId =
              new TimestampedSegment("someOtherName", "someOtherName", 0L, Position.emptyPosition(), metricsRecorder);
          final TimestampedSegment segmentDifferentId =
              new TimestampedSegment("anyName", "anyName", 1L, Position.emptyPosition(), metricsRecorder);
  
          final Set<TimestampedSegment> set = new HashSet<>();
          assertTrue(set.add(segment));
          assertFalse(set.add(segmentSameId));
          assertTrue(set.add(segmentDifferentId));
  
          segment.close();
          segmentSameId.close();
          segmentDifferentId.close();
      }
  
      @Test
      public void shouldCompareSegmentIdOnly() {
          final TimestampedSegment segment1 = new TimestampedSegment("a", "C", 50L, Position.emptyPosition(), metricsRecorder);
          final TimestampedSegment segment2 = new TimestampedSegment("b", "B", 100L, Position.emptyPosition(), metricsRecorder);
          final TimestampedSegment segment3 = new TimestampedSegment("c", "A", 0L, Position.emptyPosition(), metricsRecorder);
  
          assertThat(segment1.compareTo(segment1), equalTo(0));
          assertThat(segment1.compareTo(segment2), equalTo(-1));
          assertThat(segment2.compareTo(segment1), equalTo(1));
          assertThat(segment1.compareTo(segment3), equalTo(1));
          assertThat(segment3.compareTo(segment1), equalTo(-1));
          assertThat(segment2.compareTo(segment3), equalTo(1));
          assertThat(segment3.compareTo(segment2), equalTo(-1));
  
          segment1.close();
          segment2.close();
          segment3.close();
      }
  }
  