Hello 
I have to send email when custom_date_from - today date = 7 then send this email template->
leave_email_template
and if custom_date_from - today =1 send this email template->
leave_request_email_template
 Here I have written method for this but i donot know where I am wrong emails are not sending




@api.model
def test_cron_job(self):

    print("abcddddddddddddddddddddddddddddddddddddddddddd")
    today = fields.Date.today()
    custom_date = self.env['hr.holidays'].search([('custom_date_from', '>=', today)])
    print("custom_date", custom_date)
    for rec in custom_date:
        if fields.Date.from_string(rec.custom_date_from) - fields.Date.from_string(today) == 7:
            mail = self.env['mail.template'].browse([('half_day_leave.leave_email_template')])
            mail.send()
        else:
            if fields.Date.from_string(rec.custom_date_from) - fields.Date.from_string(today) == 1:
                mail = self.env['mail.template'].browse([('half_day_leave.leave_request_email_template')])
                mail.send()

Thanks