Sometimes you just need to send a simple confirmation email to let users know something worked. Usually with some kind of contact form or job application form for example. Users also REALLY like to know what they sent worked and was received, which is where sending a simple email message from Apex will work just fine.
First, lets create the sending class and method
public class EmailSend {
public static void sendEmail(String candidate){
Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
mail.setToAddresses(new String[]{candidate});
mail.setReplyTo('hr_address@my_company.com');
mail.setSubject('Thank You');
// https://help.salesforce.com/articleView?id=000340122&type=1&mode=1
// org-wide email address needs to be set
OrgWideEmailAddress[] owea = [SELECT Id FROM OrgWideEmailAddress WHERE Address = 'hr_address@my_company.com'];
if ( owea.size() > 0 ) {
mail.setOrgWideEmailAddressId(owea.get(0).Id);
}
mail.setHtmlBody('<p>Your message has been recieved</p>');
mail.setPlainTextBody('Your message has been recieved');
Messaging.sendEmail(new Messaging.SingleEmailMessage[]{mail});
}
}
Great! Now all we need to do to call this is pass it an email address we’re sending to.
EmailSend.sendEmail('contact@kbcarte.com');
To use this, I set an Organization-Wide email address. This is usually a catchall HR email address. And only really used for the From address.
Now, how do we test it? Great question! We’ll use governor limits. By getting the email invocations from the Limits class, we can check to make sure one was sent.
@isTest
public class TestEmailSend {
@isTest
static void testTheEmail(){
Test.startTest();
// the method we're testing
// https://gist.github.com/techb/7519e95bac3caa2b8adb3f65d2dc2dc8
EmailSend.sendEmail('test@test.com');
// we assert buy what governor limits say
Integer invocations = Limits.getEmailInvocations();
Test.stopTest();
System.assertEquals(1, invocations, 'Email has not been sent');
}
}
That wasn’t so bad was it? Now the send email method has 100% coverage and can be deployed.