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Hemalatha  ParuchuriHemalatha Paruchuri 

I want test class this programme

trigger CaseTrigger on Case (before insert,before update,after insert,after update) {
    
    if((trigger.isBefore && trigger.isInsert) ||  (trigger.isBefore && trigger.IsUpdate)){
       set<Id> accIdSet = new Set<Id>();
        for(Case cs :  trigger.new){
            if(cs.AccountId !=null){
                accIdSet.add(cs.AccountId);

            }
         }
        system.debug('accIdSet==>'+accIdSet);
        if(accIdSet !=null && accIdSet.size()>0){
            Map<Id,Account> accMap = new Map<Id,Account>([Select id,Name,Device_Replacement__c from account where id in :accIdSet]);
            system.debug('accMap==>'+accMap);
            for(Case cs: trigger.new){
                if(cs.Roku_Offer__c !=null && accMap.get(cs.AccountId).Device_Replacement__c !='Eligible'){
                    cs.addError('Roku offer is not available on this Case Account.');
                }
            }
                
        }
    }
    
    if(trigger.isAfter  &&  (trigger.isUpdate || trigger.isInsert)){
        system.debug('trigger.isAfter==>');
        Map<Id,Account> accUpdateMap = new Map<Id,Account>();
        for(Case cs:trigger.new){
            if(cs.AccountId !=null && cs.Roku_Offer__c !=null){
                accUpdateMap.put(cs.AccountId,new Account(id=cs.AccountId,Device_Replacement__c='Completed'));
                
            }
        }
        system.debug('accUpdateMap==>'+accUpdateMap);
        if(accUpdateMap !=null && accUpdateMap.size()>0){
            update accUpdateMap.values();
        }
    }
    
  
}
Hemalatha  ParuchuriHemalatha Paruchuri
@isTest(SeeAllData=true)
public class CaseTrigger_Test {
    Static testmethod void Test_trigger(){
       Account acc=new Account();
        acc.Name='hemalathatest';
        acc.Device_Replacement__c='Eligible';
        acc.Device_Replacement__c='None';
        Insert acc;
        case cas1=new case();
        cas1.AccountId=acc.Id;
          cas1.Origin='Web';
        cas1.Status='Working';
        cas1.Roku_Offer__c='HDMI';
        
        
  Insert cas1;
        case cas1=[select AccountId  from case where AccountId=:acc.Id];
              
 System.assertEquals( cas1.AccountId,acc.Name);
     }
    } 
 
iam trying to write this test clas
varun_vatsavarun_vatsa
Hi First of all, it is not a good practice to use annotation @isTest(SeeAllData=true), it is always advised to create the data in the test class itself (if writing only one test class), or create a separate utility class to create test data and return that. Now with the code.

1.) Your test class needs to be private

private class CaseTrigger_Test {
      static testMethod void(){
            
       Account acc=new Account();
        acc.Name='hemalathatest';
        acc.Device_Replacement__c='Eligible';
        //acc.Device_Replacement__c='None';
        Insert acc;
       
        system.assertNotEquals(Null,acc.id);

        case cas1=new case();
        cas1.AccountId=acc.Id;
        cas1.Origin='Web';
        cas1.Status='Working';
        cas1.Roku_Offer__c='HDMI';
        Insert cas1;

       system.assertNotEquals(Null,cas1.id);

       acc.Device_Replacement__c='None';
       update acc;
       update cas1;

      // hope this will cover both the cases, if so please mark this query "solved"
     


      }
}
 
Amit Chaudhary 8Amit Chaudhary 8
Please try below code:-
private class CaseTrigger_Test 
{
    static testMethod void Test_triggerInsert()
	{
        Account acc=new Account();
        acc.Name='hemalathatest';
        acc.Device_Replacement__c='None';
        Insert acc;
        system.assertNotEquals(Null,acc.id);

        case cas1=new case();
        cas1.AccountId=acc.Id;
        cas1.Origin='Web';
        cas1.Status='Working';
        cas1.Roku_Offer__c='HDMI';
		
		try
		{
			Insert cas1;
		}
		catch(Exception ee)
		{
			
		}
		
    }
    static testMethod void Test_triggerUpdate()
	{
        Account acc=new Account();
        acc.Name='hemalathatest';
        acc.Device_Replacement__c='Eligible';
        Insert acc;
        system.assertNotEquals(Null,acc.id);

        case cas1=new case();
        cas1.AccountId=acc.Id;
        cas1.Origin='Web';
        cas1.Status='Working';
        cas1.Roku_Offer__c='HDMI'; // Please add valid value here
		Insert cas1;
		
        cas1.Roku_Offer__c='HDMITest'; // Please add valid Value here
		Update cas1;
    }
}

Please check below blog for more detail on Test classes
http://amitsalesforce.blogspot.in/2015/06/salesforce-testing-best-practice.html
http://amitsalesforce.blogspot.in/2015/06/best-practice-for-test-classes-sample.html

Please follow below salesforce Best Practice for Test Classes :-

1. Test class must start with @isTest annotation if class class version is more than 25
2. Test environment support @testVisible , @testSetUp as well
3. Unit test is to test particular piece of code working properly or not .
4. Unit test method takes no argument ,commit no data to database ,send no email ,flagged with testMethod keyword .
5. To deploy to production at-least 75% code coverage is required 
6. System.debug statement are not counted as a part of apex code limit.
7. Test method and test classes are not counted as a part of code limit
9. We should not focus on the  percentage of code coverage ,we should make sure that every use case should covered including positive, negative,bulk and single record .
Single Action -To verify that the the single record produces the correct an expected result .
Bulk action -Any apex record trigger ,class or extension must be invoked for 1-200 records .
Positive behavior : Test every expected behavior occurs through every expected permutation , i,e user filled out every correctly data and not go past the limit .
Negative Testcase :-Not to add future date , Not to specify negative amount.
Restricted User :-Test whether a user with restricted access used in your code .10. Test class should be annotated with @isTest .
11 . @isTest annotation with test method  is equivalent to testMethod keyword .
12. Test method should static and no void return type .
13. Test class and method default access is private ,no matter to add access specifier .
14. classes with @isTest annotation can't be a interface or enum .
15. Test method code can't be invoked by non test request .
16. Stating with salesforce API 28.0 test method can not reside inside non test classes .
17. @Testvisible annotation to make visible private methods inside test classes.
18. Test method can not be used to test web-service call out . Please use call out mock .
19. You can't  send email from test method.
20.User, profile, organization, AsyncApexjob, Corntrigger, RecordType, ApexClass, ApexComponent ,ApexPage we can access without (seeAllData=true) .
21. SeeAllData=true will not work for API 23 version eailer .
22. Accessing static resource test records in test class e,g List<Account> accList=Test.loadData(Account,SobjectType,'ResourceName').
23. Create TestFactory class with @isTest annotation to exclude from organization code size limit .
24. @testSetup to create test records once in a method  and use in every test method in the test class .
25. We can run unit test by using Salesforce Standard UI,Force.com IDE ,Console ,API.
26. Maximum number of test classes run per 24 hour of period is  not grater of 500 or 10 multiplication of test classes of your organization.
27. As apex runs in system mode so the permission and record sharing are not taken into account . So we need to use system.runAs to enforce record sharing .
28. System.runAs will not enforce user permission or field level permission .
29. Every test to runAs count against the total number of DML issued in the process .


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