Hi,

Below is the apex trigger which i have written. But i got only 64% code coverage. I am not getting how to increase code coverage. Please help me how to increase code coverage.

trigger LeadTrigger on Lead (before insert,before update, after update) 
{
    Map<String, String> dispositionMap = new Map<String, String>();
    Map<String, DateTime> dispositionDateTimeMap = new Map<String, DateTime>();
    List<Id> leadIds = new List<Id>();
    if(Trigger.isInsert)
    {
        leadCategorizationClass.leadCategorization(Trigger.new,Trigger.oldMap);       //Lead Categorization
        LeadHelperClass.AddNewLead(Trigger.New);         //NEW LEAD
        leadAllocationClass.leadAllocation(Trigger.New); //GO TO CSO
        leadReAllocationClass.setRMLeadOpptyInfo(Trigger.New, Trigger.oldMap);        //When RM is Assigned
    }
    else if(Trigger.isUpdate && Trigger.isBefore)
    {
       leadCategorizationClass.leadCategorization(Trigger.new,Trigger.oldMap);       //Lead Categorization
        if(stopRecClass.stopRec==false){
            leadReAllocationClass.leadAllocationFromQueue(Trigger.New,Trigger.oldMap);//CSO allocation for Queue.
            leadReAllocationClass.setRMLeadOpptyInfo(Trigger.New, Trigger.oldMap);    //When RM is Assigned
            stopRecClass.stopRec=true;
        }
        
        for(lead ld: trigger.new)
        {
            if((ld.Dispositions__c!=trigger.oldMap.get(ld.id).Dispositions__c) 
                && (ld.Dispositions__c=='Appointment Fixed' || 
                    ld.Dispositions__c=='Follow Up' || 
                        ld.Dispositions__c=='Engaged' || ld.Dispositions__c=='Number was busy' || 
                        ld.Dispositions__c=='Ringing Not Responding' || ld.Dispositions__c=='Not available'))
            {
               if(dispositionMap.containsKey(ld.Dispositions__c))         
                   dispositionMap.put(ld.Dispositions__c,dispositionMAP.get(ld.Dispositions__c)+',91'+ld.Mobile_Number__c); 
                else
                   dispositionMap.put(ld.Dispositions__c,'91'+ld.Mobile_Number__c);         
                
                if(ld.Dispositions__c=='Appointment Fixed')
                {
                    dispositionDateTimeMap.put(ld.Dispositions__c, ld.Appointment_Creation_Date__c);
                }
                else if(ld.Dispositions__c=='Follow Up')
                {
                    dispositionDateTimeMap.put(ld.Dispositions__c, ld.Prefered_Date_Time__c);
                }
            }
           ld.Email_Internal__c = ld.Email;
}
        if(!dispositionMap.IsEmpty()){
            // call method helper class
            LeadHelperClass.sendingSMS(dispositionMap, dispositionDateTimeMap);
        }
    }
    else if(Trigger.isUpdate && Trigger.isAfter)
    {
        // for FarEye Integration //
        system.debug('After Update Trigger Fired');
        for(lead ld: Trigger.New)
        {
            if(((ld.Dispositions__c!=trigger.oldMap.get(ld.id).Dispositions__c) && (ld.Dispositions__c=='Appointment Fixed') && 
               (ld.RM__c!=null)) || (ld.Resend_To_FarEye__c==true)    
            )
            {
                system.debug('Class Calling');
                leadIds.add(ld.Id);
                //system.debug('Class End of Calling');
            }
        }
        system.debug('IDS: '+leadIds.size());
        if(leadIds.size()>0)
        {
            // call batch class here
            system.debug('<<<<<<<<<< Batch Called After Update');
            Database.executeBatch(new BatchClassFarEyeIntegrationLead(leadIds)) ;
        }}}

Below is the test class.

@isTest
public class TestLeadHelperClass {
 Public static testmethod void testLeadHelper()
 {
    
     Campaign cp = new Campaign(Name='test', IsActive=true, Interested_Product__c='LI', Channel__c='Retail');
     insert cp;
     
     Lead L1 = new Lead(FirstName='Harsh',LastName='Test',Email= 'sachin@gmail.com', Status='CSOAllocated',Company = 'Test Name', Remarks__c= 'good',Client_Type__c='NRI',Postal_Code__c='474001',Tax_Bracket__c='5%',Disposition_Category__c='General', Dispositions__c='Appointment Fixed', Interested_Product__c='Mutual Fund',Mobile_Number__c='9669259232', Appointment_Creation_Date__c = System.Today(), Campaigns__c= cp.id);
     insert L1;
     List<Lead> LT = new List<Lead>();
     LT.add(L1);
     Lead l = [SELECT Id, FirstName,LastName,Email,Status,Company ,Remarks__c,Client_Type__c,Postal_Code__c,Tax_Bracket__c,Disposition_Category__c,Dispositions__c,Interested_Product__c,Mobile_Number__c,Campaigns__c FROM Lead WHERE Id = :LT[0].Id];

     l.FirstName= 'Test Account 2';
     update l;
     Account acc = new Account(Name ='Testing', Client_Code_KYC__c='newsourcecode');
     insert acc;
     Opportunity opp1 = new Opportunity( Name = 'mAWS Usage', StageName = 'Negotiations', CloseDate = System.today(),Email__c='abc@gmail.com', Client_Type__c='Individual', AccountId=acc.Id);
     insert opp1;
     Task t = new task(WhatID = opp1.id,Subject='Donni',Status='New',Priority='Normal');
     insert t;
     
      SMSSetings__c sms = new SMSSetings__c(Disposition_Name__c = 'testsms',SMS_Content__c = 'testsms content' );
     Map<String, String> dispositionMap = new  Map<String, String>{'test'=>'test1'};
      DateTime dat = datetime.newInstance(2014, 9, 15, 12, 30, 0);
     Map<String, DateTime> dispositionDateTimeMap= new  Map<String, DateTime>{'test'=>dat};  
     LeadHelperClass lc = new LeadHelperClass();
     LeadHelperClass.AddNewLead(LT);
 }
}

Thanks in Advance.