When an account inserts and CopyBillingToShipping (Custom Field) checkbox is checked then automatically copy account billing address into account shipping address triggers in Salesforce

 Here’s an Apex Trigger that automatically copies the Billing Address fields into the Shipping Address fields when an Account is inserted and the CopyBillingToShipping checkbox is checked.

trigger CopyBillingToShipping on Account (before insert) {

    for (Account acc : Trigger.new) {

        // Check if CopyBillingToShipping__c is true

        if (acc.CopyBillingToShipping__c == true) {

            acc.ShippingStreet = acc.BillingStreet;

            acc.ShippingCity = acc.BillingCity;

            acc.ShippingState = acc.BillingState;

            acc.ShippingPostalCode = acc.BillingPostalCode;

            acc.ShippingCountry = acc.BillingCountry;

        }

    }

}

Explanation of the Code

1. Trigger Event:

   • Runs on the before insert event to modify the Shipping Address fields before the record is saved to the database.

2. Logic:

   • Checks if the custom checkbox field CopyBillingToShipping__c (assumed to be a custom field) is true.
   • Copies all relevant Billing Address fields into their respective Shipping Address fields.

3. Bulk Processing:

• Iterates over all records in Trigger.new to ensure it works for bulk inserts.

@isTest

private class CopyBillingToShippingTest {

    @isTest

    static void testCopyBillingToShipping() {

        // Test Case 1: Account with CopyBillingToShipping__c = true

        Account billingToShippingAccount = new Account(

            Name = 'Billing to Shipping Account',

            BillingStreet = '123 Billing St',

            BillingCity = 'Billing City',

            BillingState = 'Billing State',

            BillingPostalCode = '12345',

            BillingCountry = 'Billing Country',

            CopyBillingToShipping__c = true

        );

        insert billingToShippingAccount;

        // Query the inserted Account

        Account insertedAccount = [SELECT ShippingStreet, ShippingCity, ShippingState, ShippingPostalCode, ShippingCountry 

                                   FROM Account 

                                   WHERE Id = :billingToShippingAccount.Id];

        

        System.assertEquals('123 Billing St', insertedAccount.ShippingStreet, 'ShippingStreet should match BillingStreet');

        System.assertEquals('Billing City', insertedAccount.ShippingCity, 'ShippingCity should match BillingCity');

        System.assertEquals('Billing State', insertedAccount.ShippingState, 'ShippingState should match BillingState');

        System.assertEquals('12345', insertedAccount.ShippingPostalCode, 'ShippingPostalCode should match BillingPostalCode');

        System.assertEquals('Billing Country', insertedAccount.ShippingCountry, 'ShippingCountry should match BillingCountry');

        // Test Case 2: Account with CopyBillingToShipping__c = false

        Account noCopyAccount = new Account(

            Name = 'No Copy Account',

            BillingStreet = '456 Billing St',

            CopyBillingToShipping__c = false

        );

        insert noCopyAccount;

        // Query the non-copied Account

        Account noCopyInsertedAccount = [SELECT ShippingStreet FROM Account WHERE Id = :noCopyAccount.Id];

        System.assert(noCopyInsertedAccount.ShippingStreet == null, 'ShippingStreet should remain null when CopyBillingToShipping__c is false');

    }

}