/**
 * 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.access.filter;

import ch.qos.logback.core.util.TimeUtil;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;

public class StatsByDayTest {

    @Test
    public void testBasic() {
        // Tue Nov 21 18:05:36 CET 2006
        long now = 1164128736369L;
        StatsByDay statsByDay = new StatsByDay(now);

        int total = 0;
        // test fresh start
        statsByDay.update(now, 0);
        assertEquals(0, statsByDay.getLastCount());
        assertEquals(0, statsByDay.getAverage(), 0.01);

        total++;
        statsByDay.update(now, total);
        assertEquals(0, statsByDay.getLastCount());
        assertEquals(0.0, statsByDay.getAverage(), 0.01);

        long nextDay0 = TimeUtil.computeStartOfNextDay(now);
        nextDay0 += 99;

        // there should be one event the next day, avg should also be 1
        statsByDay.update(nextDay0, total);
        assertEquals(1.0, statsByDay.getLastCount(), 0.01);
        assertEquals(1.0, statsByDay.getAverage(), 0.01);

        total += 2;

        statsByDay.update(nextDay0, total);
        assertEquals(1, statsByDay.getLastCount());
        assertEquals(1.0, statsByDay.getAverage(), 0.01);

        long nextDay1 = TimeUtil.computeStartOfNextDay(nextDay0) + 6747;
        statsByDay.update(nextDay1, total);
        assertEquals(2, statsByDay.getLastCount());
        assertEquals(1.5, statsByDay.getAverage(), 0.01);

        nextDay1 += 4444;
        total += 4;

        statsByDay.update(nextDay1, total);
        // values should remain unchanged
        assertEquals(2, statsByDay.getLastCount());
        assertEquals(1.5, statsByDay.getAverage(), 0.01);

        long nextDay2 = TimeUtil.computeStartOfNextDay(nextDay1) + 11177;

        statsByDay.update(nextDay2, total);
        // values should remain unchanged
        assertEquals(4, statsByDay.getLastCount());
        assertEquals(7.0 / 3, statsByDay.getAverage(), 0.01);
    }

}
