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Jan Kopejtko 1 Test class for my trigger help
Hi, I found a great trigger that would help me with my thing - it populates my Number_of_Contacts__c field on accounts with the amount of the contacts related to the account.
But now I don't know how to write test class for this trigger. I wrote test classes for triggers before, but this one is too difficult for me at the moment. Can you write the test for me please
/* Provide summary of Number of Contacts on Account record */
trigger ContactSumTrigger on Contact (after delete, after insert, after undelete,
after update) {
Contact[] cons;
if (Trigger.isDelete)
cons = Trigger.old;
else
cons = Trigger.new;
// get list of accounts
Set<ID> acctIds = new Set<ID>();
for (Contact con : cons) {
acctIds.add(con.AccountId);
}
Map<ID, Contact> contactsForAccounts = new Map<ID, Contact>([select Id
,AccountId
from Contact
where AccountId in :acctIds]);
Map<ID, Account> acctsToUpdate = new Map<ID, Account>([select Id
,Number_of_Contacts__c
from Account
where Id in :acctIds]);
for (Account acct : acctsToUpdate.values()) {
Set<ID> conIds = new Set<ID>();
for (Contact con : contactsForAccounts.values()) {
if (con.AccountId == acct.Id)
conIds.add(con.Id);
}
if (acct.Number_of_Contacts__c != conIds.size())
acct.Number_of_Contacts__c = conIds.size();
}
update acctsToUpdate.values();
}
But now I don't know how to write test class for this trigger. I wrote test classes for triggers before, but this one is too difficult for me at the moment. Can you write the test for me please
/* Provide summary of Number of Contacts on Account record */
trigger ContactSumTrigger on Contact (after delete, after insert, after undelete,
after update) {
Contact[] cons;
if (Trigger.isDelete)
cons = Trigger.old;
else
cons = Trigger.new;
// get list of accounts
Set<ID> acctIds = new Set<ID>();
for (Contact con : cons) {
acctIds.add(con.AccountId);
}
Map<ID, Contact> contactsForAccounts = new Map<ID, Contact>([select Id
,AccountId
from Contact
where AccountId in :acctIds]);
Map<ID, Account> acctsToUpdate = new Map<ID, Account>([select Id
,Number_of_Contacts__c
from Account
where Id in :acctIds]);
for (Account acct : acctsToUpdate.values()) {
Set<ID> conIds = new Set<ID>();
for (Contact con : contactsForAccounts.values()) {
if (con.AccountId == acct.Id)
conIds.add(con.Id);
}
if (acct.Number_of_Contacts__c != conIds.size())
acct.Number_of_Contacts__c = conIds.size();
}
update acctsToUpdate.values();
}
// Test class for ContactSumTrigger // Ensures Account updates correctly when changes to related Contacts are made @isTest public class ContactSumTriggerTest { // Set up the records to be tested @testSetup static void createRecords() { // Set up five Accounts List<Account> accounts = new List<Account>(); for(Integer i = 0; i < 5; i++) { accounts.add(new Account( Name='testAccount' + i )); } insert accounts; // Set up five Contacts for each Account List<Contact> contacts = new List<Contact>(); for(Account acc : accounts) { for(Integer i = 0; i < 5; i++) { contacts.add(new Contact( LastName='testContact' + i, AccountId=acc.Id )); } } insert contacts; } // Test the insertion of Contacts @isTest public static void testContactInsert() { test.startTest(); // Set one additional Contact for each Account List<Account> accounts = [SELECT Id FROM Account]; List<Contact> contacts = new List<Contact>(); for(Account acc : accounts) { contacts.add(new Contact( LastName='testContactInsert', AccountId=acc.Id )); } insert contacts; test.stopTest(); // Make sure there are the five existing accounts List<Account> accList = [SELECT Id, Number_of_Contacts__c FROM Account]; System.assertEquals(5, accList.size()); // For each account, make sure the field was updated to reflect the number of related contacts for(Account acc : [SELECT Id, Number_of_Contacts__c FROM Account]) { System.assertEquals(6, acc.Number_of_Contacts__c); } } // Test the deletion of Contacts @isTest public static void testContactDelete() { test.startTest(); // Delete one contact from each Account List<Account> accounts = [SELECT Id, (SELECT Id FROM Contacts) FROM Account]; List<Contact> contacts = new List<Contact>(); for(Account acc : accounts) { if(acc.Contacts.size() > 0) { contacts.add(acc.Contacts[0]); } } delete contacts; test.stopTest(); // Make sure there are the five existing accounts List<Account> accList = [SELECT Id, Number_of_Contacts__c FROM Account]; System.assertEquals(5, accList.size()); // For each account, make sure the field was updated to reflect the number of related contacts for(Account acc : [SELECT Id, Number_of_Contacts__c FROM Account]) { System.assertEquals(4, acc.Number_of_Contacts__c); } } }Let me know if you need any more help, cheers!Cheers