Create a related Opportunity when an Account is created triggers in Salesforce

 Here's an Apex Trigger that automatically creates a related Opportunity whenever an Account is created.

trigger CreateOpportunityOnAccountInsert on Account (after insert) {

    List<Opportunity> opportunitiesToInsert = new List<Opportunity>();

    for (Account acc : Trigger.new) {

        // Create an Opportunity for each new Account

        Opportunity opp = new Opportunity();

        opp.Name = acc.Name + ' Opportunity'; // Opportunity name based on Account Name

        opp.AccountId = acc.Id;

        opp.StageName = 'Prospecting'; // Default stage for the Opportunity

        opp.CloseDate = Date.today().addMonths(1); // Default Close Date 1 month from today

        opportunitiesToInsert.add(opp);

    }

    // Perform bulk insert of Opportunities

    if (!opportunitiesToInsert.isEmpty()) {

        insert opportunitiesToInsert;

    }

}

Explanation of the Code

1. Trigger Event:

   • The trigger runs on the after insert event to ensure the Account is fully created before creating the Opportunity and linking it to the Account.

2. Logic:

   • For each new Account created, a new Opportunity is created with the following default values:
     • Name: The Opportunity is named after the Account with the suffix " Opportunity."
     • StageName: Set to 'Prospecting' (default).
     • CloseDate: Set to one month from the current date.
     • AccountId: Links the Opportunity to the newly created Account.

3. Bulk Processing:

• The trigger collects all the Opportunity records in a list and performs a bulk insert to ensure efficient processing.

@isTest

private class CreateOpportunityOnAccountInsertTest {

    @isTest

    static void testCreateOpportunityOnAccountInsert() {

        // Create a list of Accounts for bulk testing

        List<Account> accounts = new List<Account>{

            new Account(Name = 'Account 1'),

            new Account(Name = 'Account 2'),

            new Account(Name = 'Account 3')

        };

        // Insert the Accounts

        insert accounts;

        // Verify that Opportunities are created

        List<Opportunity> createdOpportunities = [SELECT Name, StageName, CloseDate, AccountId FROM Opportunity WHERE AccountId IN :accounts];

        System.assertEquals(3, createdOpportunities.size(), 'Three Opportunities should be created for three Accounts');

        // Verify Opportunity details for the first Account

        Opportunity opp1 = [SELECT Name, StageName, CloseDate, AccountId FROM Opportunity WHERE AccountId = :accounts[0].Id];

        System.assertEquals('Account 1 Opportunity', opp1.Name, 'Opportunity Name should be Account Name + " Opportunity"');

        System.assertEquals('Prospecting', opp1.StageName, 'Opportunity Stage should be Prospecting');

        System.assertEquals(Date.today().addMonths(1), opp1.CloseDate, 'Opportunity Close Date should be 1 month from today');

    }

}