CronTabTest.java

/*******************************************************************************
 *
 * Copyright (c) 2010, InfraDNA, Inc..
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors: 
 *
 *   
 *     
 *
 *******************************************************************************/ 

package hudson.scheduler;

import java.text.DateFormat;
import java.util.Calendar;
import java.util.GregorianCalendar;
import junit.framework.TestCase;
import org.jvnet.hudson.test.Bug;

import static java.util.Calendar.MONDAY;
import org.antlr.runtime.RecognitionException;

/**
 * @author Kohsuke Kawaguchi
 */
public class CronTabTest extends TestCase {
    public void test1() throws RecognitionException {
        new CronTab("@yearly");
        new CronTab("@weekly");
        new CronTab("@midnight");
        new CronTab("@monthly");
        new CronTab("0 0 * 1-10/3 *");
    }

    public void testCeil1() throws Exception {
        CronTab x = new CronTab("0,30 * * * *");
        Calendar c = new GregorianCalendar(2000,2,1,1,10);
        compare(new GregorianCalendar(2000,2,1,1,30),x.ceil(c));

        // roll up test
        c =     new GregorianCalendar(2000,2,1,1,40);
        compare(new GregorianCalendar(2000,2,1,2, 0),x.ceil(c));
    }

    public void testCeil2() throws Exception {
        // make sure that lower fields are really reset correctly
        CronTab x = new CronTab("15,45 3 * * *");
        Calendar c = new GregorianCalendar(2000,2,1,2,30);
        compare(new GregorianCalendar(2000,2,1,3,15),x.ceil(c));
    }

    public void testCeil3() throws Exception {
        // conflict between DoM and DoW. In this we need to find a day that's the first day of a month and Sunday
        CronTab x = new CronTab("0 0 1 * 0");
        Calendar c = new GregorianCalendar(2010,0,1,15,55);
        // the first such day in 2010 is Aug 1st
        compare(new GregorianCalendar(2010,7,1,0,0),x.ceil(c));
    }

    public void testFloor1() throws Exception {
        CronTab x = new CronTab("30 * * * *");
        Calendar c = new GregorianCalendar(2000,2,1,1,40);
        compare(new GregorianCalendar(2000,2,1,1,30),x.floor(c));

        // roll down test
        c =     new GregorianCalendar(2000,2,1,1,10);
        compare(new GregorianCalendar(2000,2,1,0,30),x.floor(c));
    }

    public void testFloor2() throws Exception {
        // make sure that lower fields are really reset correctly
        CronTab x = new CronTab("15,45 3 * * *");
        Calendar c = new GregorianCalendar(2000,2,1,4,30);
        compare(new GregorianCalendar(2000,2,1,3,45),x.floor(c));
    }

    public void testFloor3() throws Exception {
        // conflict between DoM and DoW. In this we need to find a day that's the first day of a month and Sunday in 2010
        CronTab x = new CronTab("0 0 1 * 0");
        Calendar c = new GregorianCalendar(2011,0,1,15,55);
        // the last such day in 2010 is Aug 1st
        compare(new GregorianCalendar(2010,7,1,0,0),x.floor(c));
    }

    @Bug(8401)
    public void testFloor4() throws Exception {
        // conflict between DoM and DoW. In this we need to find a day that's the first day of a month and Sunday in 2010
        CronTab x = new CronTab("0 0 1 * 0");
        Calendar c = new GregorianCalendar(2011,0,1,15,55);
        c.setFirstDayOfWeek(MONDAY);
        // the last such day in 2010 is Aug 1st
        GregorianCalendar answer = new GregorianCalendar(2010, 7, 1, 0, 0);
        answer.setFirstDayOfWeek(MONDAY);
        compare(answer,x.floor(c));
    }

    /**
     * Humans can't easily see difference in two {@link Calendar}s, do help the diagnosis by using {@link DateFormat}. 
     */
    private void compare(Calendar a, Calendar b) {
        DateFormat f = DateFormat.getDateTimeInstance();
        System.out.println(f.format(a.getTime())+" vs "+f.format(b.getTime()));
        assertEquals(a,b);
    }

}