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nausadarunachalnausadarunachal 

I want to create a Test class for my apex class

please help me 
how to create the test class for the class given below:

global with sharing   class OutboundCallForPartnersController
{
    public Id WhatId{get;set;}
    public String PartnerName{get;set;}
    public Id TaskId{get;set;}
    public Id TaskIdFollowup{get;set;}
    
    public Task objTask{get;set;}
    public Task objTaskFollowup{get;set;}
     
    public Task objTaskOwner{get;set;}
    public Task objTaskOwnerFollowUp{get;set;}
    
    public User objUser{get;set;}
    public User objUserFollowup{get;set;}
    public Partner_lead__c objparLead{get;set;}
    public Account objAccount{get;set;}
    
    public OutboundCallForPartnersController(ApexPages.StandardController controller) 
    {     
      // LoadTasks();
    }
    
     
   public List<SelectOption> getNextStepOptions() {
        List<SelectOption> options = new List<SelectOption>();
        options.add(new SelectOption('Not Started','Not Started'));
        options.add(new SelectOption('In Progress','In Progress'));
        options.add(new SelectOption('Completed','Completed'));
        options.add(new SelectOption('Waiting on someone else','Waiting on someone else'));         
        options.add(new SelectOption('Deferred','Deferred')); 
        return options;
    }


   public  pagereference  LoadTasks() {
   
       WhatId  = System.currentPageReference().getParameters().get('WhatId');
       PartnerName  = System.currentPageReference().getParameters().get('PName');
       
       //Approved Partner Insert
       If(PartnerName=='E')
       {          
            Task t = new Task();
            //t.Approved_Partners__c=WhatId;
            t.WhatId=WhatId;
            t.Status = 'Completed';
            t.ActivityDate=date.today();
            insert t;
            //New Task ID
            TaskId=t.Id;
              //Get the Owner ID
            objTaskOwner=[SELECT OwnerId FROM Task WHERE Id =:TaskId  limit 1];  
            //Owner NAme
            objUser=[select Name from user where Id=:objTaskOwner.OwnerId];
            //Get The Task
            objTask= [SELECT ReminderDateTime ,ActivityDate,Disposition__c,Call_Duration_In_Seconds__c,Call_End_Time__c,Call_Start_Time__c,Comment_Summary__c,CTI_Id__c,Description,Id,LastModifiedById,LastModifiedDate,OwnerId,PartnerLead__c,Priority,Status,Subject,Subject_C__c,WhatId,WhoId FROM Task WHERE Id = :TaskId and Status = 'Completed'];
           
            // Follow Up Entry 
            Task Ft = new Task();        
            //Ft.Approved_Partners__c=WhatId;
            Ft.WhatId=WhatId;        
            Ft.Status = 'Not Started';
            Ft.ActivityDate=date.today();
            insert Ft;
               //New Follow Up TASK ID
             TaskIdFollowup =Ft.Id; 
            // =[Select Id from Task where whatId=:WhatId and Status != 'Completed' order by CreatedDate desc limit 1];
            // Folloup Owner ID
            objTaskOwnerFollowup=[SELECT OwnerId FROM Task WHERE Id =:TaskIdFollowup  limit 1]; 
               //Owner Details
            objUserFollowup=[select Name from user where Id=:objTaskOwnerFollowup.OwnerId];
               //Folloup TAsk
            objTaskFollowup= [SELECT IsReminderSet,ReminderDateTime, ActivityDate,Disposition__c,Call_Duration_In_Seconds__c,Call_End_Time__c,Call_Start_Time__c,Comment_Summary__c,CTI_Id__c,Description,Id,LastModifiedById,LastModifiedDate,OwnerId,PartnerLead__c,Priority,Status,Subject,Subject_C__c,WhatId,WhoId FROM Task WHERE Id = :TaskIdFollowup and Status != 'Completed'];
            
            Account();
       }
       else If(PartnerName=='F')
       {          
            Task t = new Task();
            //t.Approved_Partners__c=WhatId;
            t.WhatId=WhatId;
            t.Status = 'Completed';
            t.ActivityDate=date.today();
            insert t;
            //New Task ID
            TaskId=t.Id;
              //Get the Owner ID
            objTaskOwner=[SELECT OwnerId FROM Task WHERE Id =:TaskId  limit 1];  
            //Owner NAme
            objUser=[select Name from user where Id=:objTaskOwner.OwnerId];
            //Get The Task
            objTask= [SELECT ReminderDateTime ,ActivityDate,Disposition__c,Call_Duration_In_Seconds__c,Call_End_Time__c,Call_Start_Time__c,Comment_Summary__c,CTI_Id__c,Description,Id,LastModifiedById,LastModifiedDate,OwnerId,PartnerLead__c,Priority,Status,Subject,Subject_C__c,WhatId,WhoId FROM Task WHERE Id = :TaskId and Status = 'Completed'];
           
            // Follow Up Entry 
            Task Ft = new Task();        
            //Ft.Approved_Partners__c=WhatId;
            Ft.WhatId=WhatId;        
            Ft.Status = 'Not Started';
            Ft.ActivityDate=date.today();
            insert Ft;
               //New Follow Up TASK ID
             TaskIdFollowup =Ft.Id; 
            // =[Select Id from Task where whatId=:WhatId and Status != 'Completed' order by CreatedDate desc limit 1];
            // Folloup Owner ID
            objTaskOwnerFollowup=[SELECT OwnerId FROM Task WHERE Id =:TaskIdFollowup  limit 1]; 
               //Owner Details
            objUserFollowup=[select Name from user where Id=:objTaskOwnerFollowup.OwnerId];
               //Folloup TAsk
            objTaskFollowup= [SELECT IsReminderSet,ReminderDateTime,ActivityDate,Disposition__c,Call_Duration_In_Seconds__c,Call_End_Time__c,Call_Start_Time__c,Comment_Summary__c,CTI_Id__c,Description,Id,LastModifiedById,LastModifiedDate,OwnerId,PartnerLead__c,Priority,Status,Subject,Subject_C__c,WhatId,WhoId FROM Task WHERE Id = :TaskIdFollowup and Status != 'Completed'];
            
            Account();
       }
       //Partner Lead Insert
       else if (PartnerName=='G')
       {
            //TAsk Entry
            Task t = new Task();
            //t.PartnerLead__c=WhatId;
            t.WhatId=WhatId;
            t.Status = 'Completed';
            t.ActivityDate=date.today();
            insert t;
               //New Task ID
            TaskId=t.Id;
            //TaskId  =[Select Id from Task where whatId=:WhatId and Status = 'Completed' order by CreatedDate desc limit 1];
            //Owner ID
            objTaskOwner=[SELECT OwnerId FROM Task WHERE Id =:TaskId  limit 1]; 
               //Owner Details
            objUser=[select Name from user where Id=:objTaskOwner.OwnerId];
               //Task Details
            objTask= [SELECT ActivityDate,Disposition__c,Call_Duration_In_Seconds__c,Call_End_Time__c,Call_Start_Time__c,Comment_Summary__c,CTI_Id__c,Description,Id,LastModifiedById,LastModifiedDate,OwnerId,PartnerLead__c,Priority,Status,Subject,Subject_C__c,WhatId,WhoId FROM Task WHERE Id = :TaskId and Status = 'Completed'];
           
            //New Followup Entry
            Task Ft = new Task();         
            Ft.WhatId=WhatId;
            //Ft.PartnerLead__c=WhatId;
            Ft.Status = 'Not Started';
            Ft.ActivityDate=date.today();
            insert Ft;         
            TaskIdFollowup =Ft.Id; //New followup task ID
            objTaskOwnerFollowup=[SELECT OwnerId FROM Task WHERE Id =:TaskIdFollowup  limit 1];  // owner ID        
            objUserFollowup=[select Name from user where Id=:objTaskOwnerFollowup.OwnerId];    //owner Details
            //FollowUp Task Details
            objTaskFollowup= [SELECT IsReminderSet,ReminderDateTime, ActivityDate,Disposition__c,Call_Duration_In_Seconds__c,Call_End_Time__c,Call_Start_Time__c,Comment_Summary__c,CTI_Id__c,Description,Id,LastModifiedById,LastModifiedDate,OwnerId,PartnerLead__c,Priority,Status,Subject,Subject_C__c,WhatId,WhoId FROM Task WHERE Id = :TaskIdFollowup and Status != 'Completed'];
            
            PartnerLead();
       }
       else if (PartnerName=='H')
       {
            //TAsk Entry
            Task t = new Task();
            //t.PartnerLead__c=WhatId;
            t.WhatId=WhatId;
            t.Status = 'Completed';
            t.ActivityDate=date.today();
            insert t;
               //New Task ID
            TaskId=t.Id;
            //TaskId  =[Select Id from Task where whatId=:WhatId and Status = 'Completed' order by CreatedDate desc limit 1];
            //Owner ID
            objTaskOwner=[SELECT OwnerId FROM Task WHERE Id =:TaskId  limit 1]; 
               //Owner Details
            objUser=[select Name from user where Id=:objTaskOwner.OwnerId];
               //Task Details
            objTask= [SELECT ActivityDate,Disposition__c,Call_Duration_In_Seconds__c,Call_End_Time__c,Call_Start_Time__c,Comment_Summary__c,CTI_Id__c,Description,Id,LastModifiedById,LastModifiedDate,OwnerId,PartnerLead__c,Priority,Status,Subject,Subject_C__c,WhatId,WhoId FROM Task WHERE Id = :TaskId and Status = 'Completed'];
           
            //New Followup Entry
            Task Ft = new Task();         
            Ft.WhatId=WhatId;
            //Ft.PartnerLead__c=WhatId;
            Ft.Status = 'Not Started';
            Ft.ActivityDate=date.today();
            insert Ft;         
            TaskIdFollowup =Ft.Id; //New followup task ID
            objTaskOwnerFollowup=[SELECT OwnerId FROM Task WHERE Id =:TaskIdFollowup  limit 1];  // owner ID        
            objUserFollowup=[select Name from user where Id=:objTaskOwnerFollowup.OwnerId];    //owner Details
            //FollowUp Task Details
            objTaskFollowup= [SELECT IsReminderSet,ReminderDateTime, ActivityDate,Disposition__c,Call_Duration_In_Seconds__c,Call_End_Time__c,Call_Start_Time__c,Comment_Summary__c,CTI_Id__c,Description,Id,LastModifiedById,LastModifiedDate,OwnerId,PartnerLead__c,Priority,Status,Subject,Subject_C__c,WhatId,WhoId FROM Task WHERE Id = :TaskIdFollowup and Status != 'Completed'];
            
            PartnerLead();
       }
       return null;
     }
         
    private void PartnerLead()
    {
       objparLead=[select Id,Phone__c,Cell_Phone__c from Partner_lead__c where Id =: WhatId];
    }
    private void Account()
    {
       objAccount=[select Id,Phone,Cell_Phone__c from Account where Id =: WhatId];
    }
    
     public void submit() {
        try {
            if(objTask.Id!=NULL) 
            {
                update objTask;               
            } 
            if(objTaskFollowup.Id!=NULL) 
            {
                update objTaskFollowup;               
            } 
            else 
            {
                ApexPages.AddMessage(new ApexPages.Message(ApexPages.Severity.ERROR,'Please Enter')); 
            }            
        } 
        catch(Exception e)
        {
            System.debug('-----Exception -----' + e);
            ApexPages.AddMessage(new ApexPages.Message(ApexPages.Severity.ERROR,'System Error : Contact System Admin')); 
        }      
    }
}
NagendraNagendra (Salesforce Developers) 
Hi Nausadarunachal,

Please check below post to learn about test classes
1) http://amitsalesforce.blogspot.com/search/label/Test%20Class
2)HTTP:// http://amitsalesforce.blogspot.com/2015/06/best-practice-for-test-classes-sample.html (http:// http://amitsalesforce.blogspot.com/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 version is more than 25
2. Test environment support @testVisible , @testSetUp as well
3. A unit test is to test a particular piece of code working properly or not.
4. Unit test method takes no argument, commit no data to the database,s end 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,w e should make sure that every use case should covered including positive, negative,b 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 .

Thanks,
Nagendra.