testing CronUtils for periods

CronUtilsTest.java

package ru.infon.azerfon.mas.module;

import com.cronutils.model.CronType;
import com.cronutils.model.definition.CronDefinition;
import com.cronutils.model.definition.CronDefinitionBuilder;
import com.cronutils.model.time.ExecutionTime;
import com.cronutils.parser.CronParser;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.junit.Assert;
import org.junit.Test;
import org.springframework.scheduling.support.CronSequenceGenerator;

import java.util.Date;

/**
 * 18.05.2016
 * KostaPC
 */

public class CronUtilsTest {

    private static CronDefinition cronDefinition = CronDefinitionBuilder.instanceDefinitionFor(CronType.QUARTZ);
    private static CronParser parser = new CronParser(cronDefinition);

    private final static DateTimeFormatter formatter = DateTimeFormat.forPattern("YYYY-MM-DD HH:mm:ss");

    @Test
    public void testFixedTime() {
        ExecutionTime executionTime = ExecutionTime.forCron(parser.parse("10 5 * * * ?"));
        DateTime now = DateTime.parse("2005-08-09 18:32:42", formatter);
        DateTime lastExecution = executionTime.lastExecution(now);
        System.out.println("last execution: "+lastExecution);
        DateTime assertDate = DateTime.parse("2005-01-09 18:05:10", formatter);
        Assert.assertEquals(assertDate, lastExecution);
    }

    @Test //FAILED
    public void testMinutes() {
        ExecutionTime executionTime = ExecutionTime.forCron(parser.parse("0/2 * * * * ?"));
        DateTime now = DateTime.parse("2005-08-09 18:32:42", formatter);
        DateTime lastExecution = executionTime.lastExecution(now);
        System.out.println("last execution: "+lastExecution);
        DateTime assertDate = DateTime.parse("2005-01-09 18:28:00", formatter);
        Assert.assertEquals(assertDate, lastExecution);
    }

    @Test // FAILED
    public void testSeconds() {
        ExecutionTime executionTime = ExecutionTime.forCron(parser.parse("0/20 * * * * ?"));
        DateTime now = DateTime.parse("2005-08-09 18:32:42", formatter);
        DateTime lastExecution = executionTime.lastExecution(now);
        System.out.println("last execution: "+lastExecution);
        DateTime assertDate = DateTime.parse("2005-01-09 18:32:41", formatter);
        Assert.assertEquals(assertDate, lastExecution);
    }

    @Test
    public void cronSequenceGenerator() {
        final CronSequenceGenerator generator = new CronSequenceGenerator("0/2 * * * * ?");
        DateTime now = DateTime.parse("2005-08-09 18:32:42", formatter);
        DateTime expected = now.plusSeconds(2);
        Date date = generator.next(now.toDate());
        System.out.println("date: "+date);
        Assert.assertEquals(expected, new DateTime(date));
    }

}