Spring Cron Expression Tester (Junit 5)

SpringCronExpressionTester.java

package de.jonasgroeger;

import org.junit.jupiter.api.Test;
import org.springframework.scheduling.support.CronExpression;

import java.time.LocalDateTime;
import java.time.ZoneId;

class SpringCronExpressionTester {

    private final ZoneId timezone = ZoneId.of("Europe/Berlin");

    @Test
    void testCron() {
        String cronExpression = "0 0 1 * * *";
        int MAX_RUNS = 50;

        CronExpression generator = CronExpression.parse(cronExpression);
        LocalDateTime now = LocalDateTime.now(timezone);

        for (int i = 0; i < MAX_RUNS; i++) {
            LocalDateTime nextRun = generator.next(now);
            System.out.println(nextRun);
            now = nextRun;
        }
    }
}

Updated for JUnit 5!