createFromCronExpression example

    public function testNotIsEmpty(): void
    {
        $cronInterval = new CronInterval('0 * * * *');
        static::assertFalse($cronInterval->isEmpty());
    }

    public function testCreateFromCronExpression(): void
    {
        $cronExpression = new CronExpression('0 * * * *');
        $cronInterval = CronInterval::createFromCronExpression($cronExpression);
        static::assertSame($cronInterval->getExpression(), $cronExpression->getExpression());
    }
}