/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package ch.qos.logback.core.recovery;
  
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  public class RecoveryCoordinatorTest {
  
      long now = System.currentTimeMillis();
      RecoveryCoordinator rc = new RecoveryCoordinator(now);
  
      @Test
      public void recoveryNotNeededAfterInit() {
          RecoveryCoordinator rc = new RecoveryCoordinator();
          assertTrue(rc.isTooSoon());
      }
  
      @Test
      public void recoveryNotNeededIfAsleepForLessThanBackOffTime() throws InterruptedException {
          rc.setCurrentTime(now + RecoveryCoordinator.BACKOFF_COEFFICIENT_MIN / 2);
          assertTrue(rc.isTooSoon());
      }
  
      @Test
      public void recoveryNeededIfAsleepForMoreThanBackOffTime() throws InterruptedException {
          rc.setCurrentTime(now + RecoveryCoordinator.BACKOFF_COEFFICIENT_MIN + 20);
          assertFalse(rc.isTooSoon());
      }
  
      @Test
      public void recoveryNotNeededIfCurrentTimeSetToBackOffTime() throws InterruptedException {
          rc.setCurrentTime(now + RecoveryCoordinator.BACKOFF_COEFFICIENT_MIN);
          assertTrue(rc.isTooSoon());
      }
  
      @Test
      public void recoveryNeededIfCurrentTimeSetToExceedBackOffTime() {
          rc.setCurrentTime(now + RecoveryCoordinator.BACKOFF_COEFFICIENT_MIN + 1);
          assertFalse(rc.isTooSoon());
      }
  
      @Test
      public void recoveryConditionDetectedEvenAfterReallyLongTimesBetweenRecovery() {
          // Since backoff time quadruples whenever recovery is needed,
          // we double the offset on each for-loop iteration, causing
          // every other iteration to trigger recovery.
  
          long offset = RecoveryCoordinator.BACKOFF_COEFFICIENT_MIN;
  
          for (int i = 0; i < 16; i++) {
              rc.setCurrentTime(now + offset);
  
              if (i % 2 == 0) {
                  assertTrue(rc.isTooSoon(), "recovery should've been needed at " + offset);
              } else {
                  assertFalse(rc.isTooSoon(), "recovery should NOT have been needed at " + offset);
              }
              offset *= 2;
          }
      }
  }