Need help with my test class

Question

I have updated my triggers with few lines of code and a custom setting which will allow me to dynamically activate/inactivate the trigger in production. But now the issue is that my test class is failing due to it whenever a trigger fires in the test class. Below is the error message I am receiving.

Error Message   System.DmlException: Update failed. First exception on row 0 with id 5008A000002YUVTQA4; first error: CANNOT_INSERT_UPDATE_ACTIVATE_ENTITY, CaseTrigger: execution of AfterUpdate

caused by: System.DmlException: Insert failed. First exception on row 0; first error: CANNOT_INSERT_UPDATE_ACTIVATE_ENTITY, CaseStatusHistoryTrigger: execution of AfterInsert

caused by: System.NullPointerException: Attempt to de-reference a null object

Trigger.CaseStatusHistoryTrigger: line 4, column 1: []

Class.CaseTriggerHelper.CaseAuditMethod: line 106, column 1
Trigger.CaseTrigger: line 65, column 1: []
Stack Trace Class.CaseTriggerHelper_Test.Test1: line 57, column 1

Below is my trigger.

Trigger CaseStatusHistoryTrigger on Case_Status_History__c(After Insert) 
{
    TriggerSetting__c ObjCustomSetting = TriggerSetting__c.getInstance('CaseStatusHistoryTrigger');
    IF(ObjCustomSetting.IsTriggerActive__c == FALSE)  //This is line no 4.
    { 
        Return;
    }

    IF(Trigger.IsAfter)
    {
        IF(Trigger.IsInsert)
        {
            Boolean CallThatMethod = FALSE;
            For(Case_Status_History__c CSH : Trigger.New)
            {
                IF(CSH.New_Status_Value__c == 'Closed')
                {
                    callThatMethod = true;
                }                             
            }
            IF(callThatMethod) 
            {
                CaseStatusHistoryTriggerHelper.UpdateCSHFields(Trigger.New);
            }
        }
    }
}

Below is the test class.

//This test class is written for testing the class "CaseTriggerHelper" and the trigger "CaseTrigger".
@IsTest
Public Class CaseTriggerHelper_Test
{
    Public Static TestMethod Void Test1()
    {
        Test.startTest();

        RecordType parentRT = [select id from RecordType where name = 'Parent Account' and SObjectType = 'Account' limit 1];
        System.assertNotEquals(null, parentRT.id);

        Account Acc = New Account(Name = 'New Test Account' , RecordTypeId = parentRT.id);
        Insert Acc;
        System.assertNotEquals(null, Acc.id);

        Contact Con = New Contact(FirstName = 'New Test' , LastName = 'Contact' , AccountId= Acc.Id , Email = '[email protected]' , Phone = '9191919191' , Contact_Type__c = 'Customer' , Will_Sample_be_sent_to_customer__c = 'NO');
        Insert Con;
        System.assertNotEquals(null, Con.id);

        RecordType CaseRT = [select id from RecordType where name = 'Delivery Escalation' and SObjectType = 'Case' limit 1];
        System.assertNotEquals(null, CaseRT.id);

        Product2 Produc1 = New Product2(Name = 'Product 1' , PL_product_design_id__c = '12345');
        Insert Produc1;
        System.assertNotEquals(null, Produc1.id);

        Product2 Produc2 = New Product2(Name = 'Product 1' , PL_product_design_id__c = '12345');
        Insert Produc2;
        System.assertNotEquals(null, Produc2.id);

        Case Cas = New Case(AccountId = Acc.Id , ContactId = Con.Id , Origin = 'Phone' , Status = 'New' , Subject = 'New Case' , RecordTypeId = CaseRT.id , Part_Number__c = produc1.id , Product__c = produc2.id , DP_Entity__c = '1234' , Quantity__c = 2 , Revenue_Impact__c = 12 , Type = 'MAD > CRD');
        Insert Cas;
        System.assertNotEquals(null, Cas.id);

        Profile Prof = [select id from Profile where name = 'System Administrator' limit 1];
        System.assertNotEquals(null, Prof.id);

        User U = New User(FirstName = 'Test' , LastName = 'User' , Alias = 'UsTe' , Username = '[email protected]' , Email = '[email protected]' , TimeZoneSidKey = 'America/Chicago' , LocaleSidKey = 'en_US' , LanguageLocaleKey = 'en_US' , EmailEncodingKey = 'ISO-8859-1' , ProfileId = prof.id);
        Insert U;
        System.assertNotEquals(null, U.id);

        CaseTeamRole CTR1 = [Select Id from CaseTeamRole where Name = 'BU' limit 1];
        System.assertNotEquals(null, CTR1.id);

        CaseTeamRole CTR2 = [Select Id,Name from CaseTeamRole where Name = 'DA' limit 1];
        System.assertNotEquals(null, CTR2.id);

        CaseTeamMember CTM1 = New CaseTeamMember(ParentId = Cas.Id , MemberId = Con.Id , TeamRoleId = CTR1.Id);
        Insert CTM1;
        System.assertNotEquals(null, CTM1.id);

        CaseTeamMember CTM2 = New CaseTeamMember(ParentId = Cas.Id , MemberId = U.Id , TeamRoleId = CTR2.Id);
        Insert CTM2;
        System.assertNotEquals(null, CTM2.id);

        Cas.Status = 'DA Working';
        Update Cas; // This is line 57. Since here 'CaseStatusHistoryTrigger' fires then the error is thrown.
        System.assertEquals('DA Working',Cas.Status);

        try
        {
        Cas.Status = 'OF Working';
        Update Cas;
        System.assertEquals('CSO Working',Cas.Status);
        }
        catch(Exception e)
        {
        Boolean expectedExceptionThrown =  e.getMessage().contains('No Case Team Member Exist with this Role. Please change the status which has its corresponding Team Member Present') ? true : false;
        //System.AssertEquals(expectedExceptionThrown, true);
        } 

        RecordType CaseRTCSP = [select id from RecordType where name = 'CSP Mix Request' and SObjectType = 'Case' limit 1];
        System.assertNotEquals(null, CaseRT.id);

        Product2 Prod1 = New Product2(Name = 'Product 1' , PL_product_design_id__c = '12345' , PL_PART_NUMBER__c = '6789');
        Insert Prod1;

        Case Cas2 = New Case(AccountId = Acc.Id , ContactId = Con.Id , Origin = 'Phone' , Status = 'New' , Subject = 'New Case' , RecordTypeId = CaseRTCSP.id , Current_MPN__c = Prod1.Id);
        Insert Cas2;
        System.assertNotEquals(null, Cas2.id);     

        CaseTeamMember CTM3 = New CaseTeamMember(ParentId = Cas2.Id , MemberId = U.Id , TeamRoleId = CTR2.Id);
        Insert CTM3;
        System.assertNotEquals(null, CTM3.id); 

        Cas2.Status = 'DA Working';
        Update Cas2;

        Cas2.Status = 'CSO Working';
        Update Cas2;  

        Test.stopTest();
    }
}

The records exist in the custom setting. Below is the snapshot of the same.

Test class is failing for all the 3 triggers whose records I have created in custom setting.

Please guide me in resolving this issue.

Thanks! Ruchika Saxena

Answer 1

According to your error message (System.NullPointerException: Attempt to de-reference a null object) and your code:

TriggerSetting__c ObjCustomSetting = TriggerSetting__c.getInstance('CaseStatusHistoryTrigger');
IF(ObjCustomSetting.IsTriggerActive__c == FALSE)

the reason seems that you do not have this custom setting in your test. Line 4 would only throw this exception if ObjCustomSetting is null, so that means that on line 3:

TriggerSetting__c.getInstance('CaseStatusHistoryTrigger')

this part is returning null.

Make sure that you have this custom setting in your test class and it will fix your problem