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.server;
  
  import org.apache.kafka.common.utils.ExponentialBackoff;
  
  import org.junit.jupiter.api.Test;
  
  import java.util.OptionalLong;
  
  import static org.apache.kafka.common.requests.AssignReplicasToDirsRequest.MAX_ASSIGNMENTS_PER_REQUEST;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class AssignmentsManagerDeadlineFunctionTest {
      private static final ExponentialBackoff BACKOFF = new ExponentialBackoff(1000, 2, 8000, 0.0);
  
      @Test
      public void applyAfterDispatchInterval() {
          assertEquals(OptionalLong.of(BACKOFF.initialInterval()),
              new AssignmentsManagerDeadlineFunction(BACKOFF, 0, 0, false, 12).
                  apply(OptionalLong.empty()));
      }
  
      @Test
      public void applyAfterDispatchIntervalWithExistingEarlierDeadline() {
          assertEquals(OptionalLong.of(BACKOFF.initialInterval() / 2),
              new AssignmentsManagerDeadlineFunction(BACKOFF, 0, 0, false, 12).
                  apply(OptionalLong.of(BACKOFF.initialInterval() / 2)));
      }
  
      @Test
      public void applyBackoffInterval() {
          assertEquals(OptionalLong.of(BACKOFF.initialInterval() * 2),
              new AssignmentsManagerDeadlineFunction(BACKOFF, 0, 1, false, 12).
                  apply(OptionalLong.empty()));
      }
  
      @Test
      public void applyBackoffIntervalWithExistingEarlierDeadline() {
          assertEquals(OptionalLong.of(BACKOFF.initialInterval() / 2),
              new AssignmentsManagerDeadlineFunction(BACKOFF, 0, 1, false, 12).
                  apply(OptionalLong.of(BACKOFF.initialInterval() / 2)));
      }
  
      @Test
      public void scheduleImmediatelyWhenOverloaded() {
          assertEquals(OptionalLong.of(0),
              new AssignmentsManagerDeadlineFunction(BACKOFF, 0, 0, false,
                  MAX_ASSIGNMENTS_PER_REQUEST + 1).
                      apply(OptionalLong.of(BACKOFF.initialInterval() / 2)));
      }
  
      @Test
      public void doNotScheduleImmediatelyWhenOverloadedIfThereAreInFlightRequests() {
          assertEquals(OptionalLong.of(BACKOFF.initialInterval()),
              new AssignmentsManagerDeadlineFunction(BACKOFF, 0, 0, true,
                  MAX_ASSIGNMENTS_PER_REQUEST + 1).
                      apply(OptionalLong.empty()));
      }
  
      @Test
      public void doNotScheduleImmediatelyWhenOverloadedIfThereArePreviousGlobalFailures() {
          assertEquals(OptionalLong.of(BACKOFF.initialInterval() * 2),
              new AssignmentsManagerDeadlineFunction(BACKOFF, 0, 1, false,
                  MAX_ASSIGNMENTS_PER_REQUEST + 1).
                      apply(OptionalLong.empty()));
      }
  }
  