@isTest
private class ProductMonthlySalesCountManyScheduleTest {
    static testMethod void testMethod1() {
        String CRON_EXP = '0 0 0 3 9 ? 2022';

        System.Test.startTest();
        // Schedule the test job
        system.schedule('ProductMonthlySalesCountManyScheduleTest', CRON_EXP, new ProductMonthlySalesCountManySchedule());
        // System.assertEquals('2022-09-03 00:00:00', String.valueOf(ct.NextFireTime));
        System.Test.StopTest();
    }
}