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   * "License"); you may not use this file except in compliance
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   *
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  package org.apache.cassandra.hints;
  
  import java.time.Duration;
  import java.util.Collections;
  import java.util.List;
  import java.util.concurrent.ExecutionException;
  
  import org.junit.After;
  import org.junit.Before;
  import org.junit.BeforeClass;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  
  import org.apache.cassandra.SchemaLoader;
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.net.MessagingService;
  import org.apache.cassandra.net.MockMessagingService;
  import org.apache.cassandra.net.MockMessagingSpy;
  import org.apache.cassandra.schema.KeyspaceParams;
  import org.apache.cassandra.schema.Schema;
  import org.apache.cassandra.schema.TableMetadata;
  import org.apache.cassandra.service.StorageService;
  import org.awaitility.Awaitility;
  import org.jboss.byteman.contrib.bmunit.BMRule;
  import org.jboss.byteman.contrib.bmunit.BMUnitRunner;
  
  import org.apache.cassandra.utils.MockFailureDetector;
  import static org.apache.cassandra.hints.HintsTestUtil.sendHintsAndResponses;
  import static org.junit.Assert.assertEquals;
  
  @RunWith(BMUnitRunner.class)
  public class HintServiceBytemanTest
  {
      private static final String KEYSPACE = "hints_service_test";
      private static final String TABLE = "table";
  
      private final MockFailureDetector failureDetector = new MockFailureDetector();
      private static TableMetadata metadata;
  
      @BeforeClass
      public static void defineSchema()
      {
          SchemaLoader.prepareServer();
          StorageService.instance.initServer();
          SchemaLoader.createKeyspace(KEYSPACE,
                                      KeyspaceParams.simple(1),
                                      SchemaLoader.standardCFMD(KEYSPACE, TABLE));
          metadata = Schema.instance.getTableMetadata(KEYSPACE, TABLE);
      }
  
      @After
      public void cleanup()
      {
          MockMessagingService.cleanup();
      }
  
      @Before
      public void reinstanciateService() throws Throwable
      {
          MessagingService.instance().inboundSink.clear();
          MessagingService.instance().outboundSink.clear();
  
          if (!HintsService.instance.isShutDown())
          {
              HintsService.instance.shutdownBlocking();
              HintsService.instance.deleteAllHints();
          }
  
          failureDetector.isAlive = true;
  
          HintsService.instance = new HintsService(failureDetector);
  
          HintsService.instance.startDispatch();
      }
  
      @Test
      @BMRule(name = "Delay delivering hints",
      targetClass = "DispatchHintsTask",
      targetMethod = "run",
      action = "Thread.sleep(DatabaseDescriptor.getHintsFlushPeriodInMS() * 3L)")
      public void testListPendingHints() throws InterruptedException, ExecutionException
      {
          HintsService.instance.resumeDispatch();
          MockMessagingSpy spy = sendHintsAndResponses(metadata, 20000, -1);
          Awaitility.await("For the hints file to flush")
                    .atMost(Duration.ofMillis(DatabaseDescriptor.getHintsFlushPeriodInMS() * 2L))
                    .until(() -> !HintsService.instance.getPendingHints().isEmpty());
  
          List<PendingHintsInfo> pendingHints = HintsService.instance.getPendingHintsInfo();
          assertEquals(1, pendingHints.size());
          PendingHintsInfo info = pendingHints.get(0);
          assertEquals(StorageService.instance.getLocalHostUUID(), info.hostId);
          assertEquals(1, info.totalFiles);
          assertEquals(info.oldestTimestamp, info.newestTimestamp); // there is 1 descriptor with only 1 timestamp
  
          spy.interceptMessageOut(20000).get();
          assertEquals(Collections.emptyList(), HintsService.instance.getPendingHints());
      }
  }
  