Support teams often need to act quickly when a High Priority Case is logged.

As soon as a Case with Priority ‘High’ is created, an email alert should be sent to support agents or managers, so they’re instantly notified.

Business Logic:

1. When a Case is inserted,
2. Check if Priority == 'High',
3. Send an email alert with case details (Subject, Case Number, etc.)

Where do we use this?

There are 2 options:

• Flow (recommended for simple alerts — click-based)
• Apex Trigger with Messaging.SingleEmailMessage (for more control)

Apex Trigger Code:

trigger HighPriorityCaseAlert on Case (after insert) {
    List<Messaging.SingleEmailMessage> emails = new List<Messaging.SingleEmailMessage>();

    for (Case c : Trigger.new) {
        if (c.Priority == 'High') {
            Messaging.SingleEmailMessage email = new Messaging.SingleEmailMessage();
            email.setToAddresses(new String[] {'support@sfdctelugu.in'});
            email.setSubject('🔥 High Priority Case Alert: ' + c.CaseNumber);
            email.setPlainTextBody(
                'A high-priority case has been created:\n\n' +
                'Subject: ' + c.Subject + '\n' +
                'Case Number: ' + c.CaseNumber + '\n' +
                'Description: ' + c.Description
            );
            emails.add(email);
        }
    }

    if (!emails.isEmpty()) {
        Messaging.sendEmail(emails);
    }
}

What You Need:

• A valid org-wide email address setup.
• Replace support@sfdctelugu.in with a valid internal email.
• You could also fetch the user/group dynamically if needed.

Test Class:

@isTest
public class HighPriorityCaseAlertTest {
    @isTest
    static void testHighPriorityCaseSendsEmail() {
        // No need to test email delivery — just test no error on insert
        Case c = new Case(Subject = 'Urgent Issue', Priority = 'High', Status = 'New');
        insert c;
    }

    @isTest
    static void testLowPriorityCaseDoesNotSendEmail() {
        Case c = new Case(Subject = 'Minor Issue', Priority = 'Low', Status = 'New');
        insert c;
    }
}

Anonymous Window Test:

Case c = new Case(Subject = 'Server Down', Priority = 'High', Status = 'New');
insert c;

If your org email settings are correct, the recipient will get an alert instantly.