content: /**
   * Licensed 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.aurora.common.util;
  
  import org.apache.aurora.common.quantity.Amount;
  import org.apache.aurora.common.quantity.Time;
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.fail;
  
  /**
   * @author John Sirois
   */
  public class TruncatedBinaryBackoffTest {
    @Test(expected = NullPointerException.class)
    public void testNullInitialBackoffRejected() {
      new TruncatedBinaryBackoff(null, Amount.of(1L, Time.SECONDS));
    }
  
    @Test(expected = IllegalArgumentException.class)
    public void testZeroInitialBackoffRejected() {
      new TruncatedBinaryBackoff(Amount.of(0L, Time.SECONDS), Amount.of(1L, Time.SECONDS));
    }
  
    @Test(expected = IllegalArgumentException.class)
    public void testNegativeInitialBackoffRejected() {
      new TruncatedBinaryBackoff(Amount.of(-1L, Time.SECONDS), Amount.of(1L, Time.SECONDS));
    }
  
    @Test(expected = NullPointerException.class)
    public void testNullMaximumBackoffRejected() {
      new TruncatedBinaryBackoff(Amount.of(1L, Time.SECONDS), null);
    }
  
    @Test(expected = IllegalArgumentException.class)
    public void testMaximumBackoffLessThanInitialBackoffRejected() {
      new TruncatedBinaryBackoff(Amount.of(2L, Time.SECONDS), Amount.of(1L, Time.SECONDS));
    }
  
    @Test
    public void testCalculateBackoffMs() {
      TruncatedBinaryBackoff backoff =
          new TruncatedBinaryBackoff(Amount.of(1L, Time.MILLISECONDS),
              Amount.of(12L, Time.MILLISECONDS));
  
      try {
        backoff.calculateBackoffMs(-1L);
        fail("calculateBackoffMs should throw an exception when give a negative value.");
      } catch (IllegalArgumentException e) {
        // expected
      }
  
      long calculateBackoffMs0 = backoff.calculateBackoffMs(0);
      assertTrue(1 <= calculateBackoffMs0 && calculateBackoffMs0 <= 2);
  
      long calculateBackoffMs1 = backoff.calculateBackoffMs(1);
      assertTrue(1 <= calculateBackoffMs1 && calculateBackoffMs1 <= 2);
  
      long calculateBackoffMs2 = backoff.calculateBackoffMs(2);
      assertTrue(2 <= calculateBackoffMs2 && calculateBackoffMs2 <= 4);
  
      long calculateBackoffMs4 = backoff.calculateBackoffMs(4);
      assertTrue(4 <= calculateBackoffMs4 && calculateBackoffMs4 <= 8);
  
      long calculateBackoffMs8 = backoff.calculateBackoffMs(8);
      assertTrue(8 <= calculateBackoffMs8 && calculateBackoffMs8 <= 12);
  
      assertEquals(12, backoff.calculateBackoffMs(16));
    }
  
    @Test
    public void testShouldContinue() {
      TruncatedBinaryBackoff backoff =
          new TruncatedBinaryBackoff(Amount.of(1L, Time.MILLISECONDS),
              Amount.of(6L, Time.MILLISECONDS), true);
  
      assertTrue(backoff.shouldContinue(0));
      assertTrue(backoff.shouldContinue(1));
      assertTrue(backoff.shouldContinue(2));
      assertTrue(backoff.shouldContinue(4));
      assertFalse(backoff.shouldContinue(6));
      assertFalse(backoff.shouldContinue(8));
    }
  }
  