/**
    * 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.classic.corpusTest;
  
  import java.util.Random;
  
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.BeforeEach;
  
  import ch.qos.logback.classic.corpus.RandomUtil;
  import org.junit.jupiter.api.Test;
  
  public class RandomUtilTest {
      long now = System.currentTimeMillis();
  
      @BeforeEach
      public void setup() {
          System.out.println(RandomUtilTest.class.getName() + " now=" + now);
      }
  
      @Test
      public void smoke() {
  
          int EXPECTED_AVERAGE = 6;
          int EXPECTED_STD_DEVIATION = 3;
  
          System.out.println();
          Random r = new Random(now);
          int len = 3000;
          int[] valArray = new int[len];
          for (int i = 0; i < len; i++) {
              valArray[i] = RandomUtil.gaussianAsPositiveInt(r, EXPECTED_AVERAGE, EXPECTED_STD_DEVIATION);
          }
          double avg = average(valArray);
  
          Assertions.assertEquals(EXPECTED_AVERAGE, avg, 0.3);
      }
  
      public double average(int[] va) {
          double avg = 0;
          for (int i = 0; i < va.length; i++) {
              avg = (avg * i + va[i]) / (i + 1);
          }
          return avg;
      }
  
  }