Apex Trigger with Helper Class and Test Class

For New Developer Like I am.

1. Scenario - Create a Class, when an Account is inserted then an Opportunity with pre-defined value will be inserted under Account (Related List).

2. Create a Trigger for call the Class functionality.

3. Also create a Test Class.

Step 1. Class - 'CreateAccountOpportunity'

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public class CreateAccountOpportunity { public List <opportunity> oppList = new List <opportunity>(); public void CreateOpportunity(List <account> accList){ for (Account objAcc: accList) { Opportunity objOpp = new Opportunity(); objOpp.AccountID = objAcc.ID; objOpp.Name = a.Name; objOpp.CloseDate = System.Today().addDays(3); objOpp.StageName = 'Prospecting'; oppList.add(objOpp); } if (oppList.size() > 0) Database.Insert(oppList); } }

Step 2. Trigger - 'trg_createnewoppor'

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trigger trg_createnewoppor on Account(after Insert, after update) { if ((Trigger.isInsert) || (Trigger.IsBefore)) { CreateAccountOpportunity objAccOpp = new CreateAccountOpportunity(); objAccOpp.CreateOpportunity(Trigger.New); } }

Step 3. Test Class - 'trg_createnewoppor'

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@isTest public class CreateNewOpportunityTest { @isTest public static void CreateOpportunityTestMethod() { Account objAccount = new Account(); objAccount.Name = 'Test Acc'; insert objAccount; System.AssertEquals(objAccount.Name, 'Test Acc'); Opportunity objOpportunity = new Opportunity(); objOpportunity.Name = 'Test Opp'; objOpportunity.Accountid = objAccount.id; objOpportunity.StageName = 'Prospecting'; objOpportunity.CloseDate = system.Today() + 3; insert objOpportunity; System.AssertEquals(objOpportunity.Name, 'Test Opp'); } }

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