public class EmailSendTest {
    
    public static void EmailSendTest1(){
        List <String> toAddresses = new List <String>();
        toAddresses.add('ujjawal@hicglobalsolutions.com');
        String subject ='HIC Shopify Batch Completed' ; 
        Messaging.SingleEmailMessage email =new Messaging.SingleEmailMessage();
        email.setSubject(subject);
        
        if(!toAddresses.isEmpty() ){
            System.debug('addrress****_-'+toAddresses);
            email.setToAddresses(toAddresses );
            
            email.setPlainTextBody('Successful Imported all data from Shopify');
            
            Integer email_left = Limits.getEmailInvocations();
            system.Debug('Before Used Email: '+email_left);
            Integer emailLimit = Limits.getLimitEmailInvocations();
            system.Debug('Before Email Limit: '+emailLimit);
            
            Messaging.SendEmailResult [] r = Messaging.sendEmail(new Messaging.SingleEmailMessage[] {email}); 
            system.debug('***SendEmailResult'+r);
            
            Integer email_left1 = Limits.getEmailInvocations();
            system.Debug('After Used Email: '+email_left1);
            Integer emailLimit1 = Limits.getLimitEmailInvocations();
            system.Debug('After Email Limit: '+emailLimit1);
        } 
    }
    
}