/**
* 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 static org.junit.Assert.assertEquals;
import java.util.Random;
import org.junit.Before;
import org.junit.Test;
import ch.qos.logback.classic.corpus.RandomUtil;
public class RandomUtilTest {
long now = System.currentTimeMillis();
@Before
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);
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;
}
}