Map<Id,Checklist__c> m_cl = new Map<Id, Checklist__c>();
Set<Id> checkListIds = new Set<Id>();
        Set<Id> prjIds = new Set<Id>();
        Set<Id> prjNcIds = new Set<Id>();
        Set<Id> checkListNcIds = new Set<Id>();

        if(Trigger.isUpdate) {            
            for (SObject so : Trigger.New) {
              Checklist__c newCL = (Checklist__c) so;
              Checklist__c oldCL = Trigger.oldMap != null && Trigger.oldMap.containsKey(newCL.Id)
                ? (Checklist__c) Trigger.oldMap.get(newCL.Id)
                : null;

                    if(newCL.Status__c != oldCL.Status__c && (newCL.Status__c == 'Complete' || oldCL.Status__c == 'In Progress')){
                        m_cl.put(newCL.Activity__c, newCL);
                        checkListIds.add(newCL.Id);
                        prjIds.add(newCL.Project__c);
                    }

            }

            if(checkListIds.size()> 0){
                act = [Select id,Name,Project__c, Project__r.RC_Completed__c, Project__r.M5_Completed__c,Checklist__r.Status__c,Checklist__r.Name,Checklist__c,Form_Complete__c
                      FROM Activity__c 
                      WHERE Form_Complete__c = false 
                      AND Checklist__c IN : checkListIds
                      ];

                prj = [Select id, Name, RC_Completed__c ,M5_Completed__c 
                       FROM Project__c 
                       WHERE Id IN : prjIds];
              
                if( act.size() > 0){
                    for(Activity__c acts : act){
                        formName = acts.Checklist__r.Name.split(':');    
                        if(formName[1] == 'Pre-M5 Check List Form' && m_cl.get('Status__c') == 'Complete'){
                            acts.M5_Completed__c = true;
                            actToUpdate.add(acts);
                        }
                        else {
                            acts.RC_Completed__c = true;
                            actToUpdate.add(acts);
                        }
                    }
                }

public  class UpdateLeaseQueueable implements Queueable {
    
    List<Lease__c> updateLeases = new List<Lease__c>();

    public UpdateLeaseQueueable( Map<Id, Lease__c> leases) {
        updateLeases.addAll(leases.Values());
    }

    public void execute(QueueableContext qc) {  

        if (!updateLeases.isEmpty()) { 
           //pass leases to Batch class
        }
    }
}

global class UpdateLeaseQueueableBatch implements Database.Batchable <sObject>, Database.Stateful{
   
    global Database.QueryLocator start(Database.BatchableContext bc){
        
    }
    
    global void execute(Database.BatchableContext bc, List<> listLease){
       
    }
    
    global void finish(Database.BatchableContext bc){
    }
}

global class BatchFinanceUpdateFromDCON implements Database.Batchable<sObject> {

    global Database.QueryLocator start(Database.BatchableContext BC)
    {        
        Date yesterday = System.today() - 2;
        String query = 'SELECT Id, Requisition_Number__c, PO_Line_Description__c, DCONFinanceKeyField__c, PO_Number__c, PO_Line_Number__c,' +
                      'Goods_Received_Date__c,Record_Marked_for_Deletion__c FROM DCON_Cube_Data__c WHERE Record_Marked_for_Deletion__c = false AND '+
                      'LastModifiedDate > yesterday AND (Requisition_Number__c != null AND PO_Line_Description__c != null) AND ' +
                      '(PO_Number__c != null OR PO_Line_Number__c != Null OR Goods_Received_Date__c != null)';

       return Database.getQueryLocator(query);
    }
  
    global void execute(Database.BatchableContext BC, List<SObject> scope)
    {                   
        List<DCON_Cube_Data__c> matchDCONAndFin = (List<DCON_Cube_Data__c>)scope;
        Set<String> odapIds = new Set<String>();
        List<Finance__c> finListToUpdate = new List<Finance__c>();
        List<Finance__c> listOfFinance = new List<Finance__c>();
        List<Finance__c> listOfFinanceAllValues = new List<Finance__c>();
        List<DCON_Cube_Data__c> listOfDCONToDelete = new List<DCON_Cube_Data__c>();
        List<DCON_Cube_Data__c> DCONListToUpdate = new List<DCON_Cube_Data__c>();
        Date yesterday = System.today() - 2;

        for (DCON_Cube_Data__c DCONs : matchDCONAndFin){
            if(DCONs.PO_Line_Description__c != null && DCONs.Requisition_Number__c != null){
                odapIds.add(DCONs.DCONFinanceKeyField__c);
            }
        }

        if (!odapIds.isEmpty()) {
            listOfFinance = [SELECT Id, finDCONKeyField__c, PO_Number_Custom__c, PO_Line_Number_Custom__c, Goods_Received_Date__c ,Actual_Date__c
                                                              FROM Finance__c 
                                                              WHERE (PO_Number_Custom__c = null OR PO_Line_Number_Custom__c = Null OR Goods_Received_Date__c = null) 
                                                              AND finDCONKeyField__c in : odapIds];
        }

        Map<String, Finance__c> m_finNums = new  Map<String, Finance__c>();
        Map<String, DCON_Cube_Data__c> o_DCONNums = new  Map<String, DCON_Cube_Data__c>();
    
        for(Finance__c fins : listOfFinance){
            m_finNums.put(fins.finDCONKeyField__c, fins);
        }

         for(DCON_Cube_Data__c DCON : matchDCONAndFin){
             o_DCONNums.put(DCON.DCONFinanceKeyField__c, DCON);
         }
         
        for (DCON_Cube_Data__c DCONs : o_DCONNums.values()){                                      
            for(Finance__c finObj : listOfFinance){
                if(finObj.finDCONKeyField__c == DCONs.DCONFinanceKeyField__c ){    
                    if(finObj.Actual_Date__c == null){
                        finObj.Actual_Date__c = System.today();
                    }
                        if(DCONs.PO_Number__c != null && finObj.PO_Number_Custom__c == null){
                                finObj.PO_Number_Custom__c = DCONs.PO_Number__c;
                        }
                            if(DCONs.PO_Line_Number__c != null && finObj.PO_Line_Number_Custom__c == null){
                                finObj.PO_Line_Number_Custom__c = DCONs.PO_Line_Number__c;
                            }
                                if(DCONs.Goods_Received_Date__c != null && finObj.Goods_Received_Date__c == null){
                                    finObj.Goods_Received_Date__c = DCONs.Goods_Received_Date__c;
                                }
                        finListToUpdate.add(finObj);             
                } 
            } 
        }

        if(!finListToUpdate.isEmpty()){
            Database.update(finListToUpdate, false);
        }               
   }

    global void finish(Database.BatchableContext BC){
        BatchUpdateDCONForDeletion bd = new BatchUpdateDCONForDeletion();
        Database.executeBatch(bd, 200);
   }    
}

<apex:page standardController="Project__c" extensions="CreateNewProRecord" action="{!newRecord}"/>

public with sharing class PDF_EmailController {
    
    @auraEnabled

    public static void SendAttachment(String recordId){
           
        for(Purchase_Order_Request__c por : [SELECT Id, Email_Address__c FROM Purchase_Order__c
        WHERE Id =: recordId]){
            Messaging.SingleEmailMessage semail = new Messaging.SingleEmailMessage();
            Messaging.EmailFileAttachment attach = new Messaging.EmailFileAttachment();

            PageReference pref = page.POPDF;
            pref.getParameters().put('Id',por.Id);
            pref.setRedirect(true);
            Blob b = pref.getContent();
            attach.setFileName('POR.pdf');
            attach.setBody(b);
            semail.setSubject('Purchase Order Request Details');
            semail.setToAddresses(new String[] { por.Email_Address__c });
            semail.setPlainTextBody('Please find the attached POR details');
            semail.setFileAttachments(new Messaging.EmailFileAttachment[]{attach});
            Messaging.sendEmail(new Messaging.SingleEmailMessage[]{semail});

        }

        for(Purchase_Order_Request__c por : [SELECT Id, Email_Address__c,Version__c FROM Purchase_Order__c
                                             WHERE Id =: recordId]){
            PageReference PDf =  Page.PORequestPDF;
            PDf.getParameters().put('Id',por.Id);
            PDf.setRedirect(true);
            Attachment attach = new Attachment();
            Blob b ;
            b = PDf.getContent();
            attach.Body = b;
            attach.Name = 'Purchase Order Confirmation ' + System.today();
            attach.IsPrivate = false;
            attach.ParentId = por.Id;
            insert attach;

        }
    }
 }



Visualforce Page

<apex:page controller="PDF_EmailController" standardStylesheets="false" showHeader="false">    
    <center>
        <P style="font-size:22px;"><u>Send Purchase Order Request</u></P>
        <input type="text" value="" id="txtEmailAddress"/><br/><br/>
        <input type="button" onclick="SendEmailAttachment();" value="Send"/>
    </center>
    <script>
    function SendEmailAttachment(){
        var PORId = '{!$CurrentPage.parameters.Id}';
        var emailAddress=document.getElementById('txtEmailAddress').value;
        if(emailAddress!=null && emailAddress!=''){
            TestHandler.SendAttachment(emailAddress,porId,function(result,event){
                if(event.status){
                    if(result=='SUCCESS'){
                        alert('Email sent successfully.');
                    }
                    else{
                        alert(result);
                    }
                }
            })
        }
        else{
            alert('Please provide email address!');
        }
    }
    </script>
 </apex:page>

public with sharing class RequestPDF_EmailController {
    
    @RemoteAction
    public static string SendAttachment(String sEmailAddress, String tempId){
        String sMessage='';
        try{            
            Messaging.SingleEmailMessage semail = new Messaging.SingleEmailMessage();
            Messaging.EmailFileAttachment attach = new Messaging.EmailFileAttachment();

            PageReference pref = page.RequestPDF;
            pref.getParameters().put('id',tempId);
            pref.setRedirect(true);
            Blob b = pref.getContent();
            attach.setFileName('AttachedInV.pdf');
            attach.setBody(b);
            semail.setSubject('Inv Details');
            semail.setToAddresses(new List<String>{sEmailAddress});
            semail.setPlainTextBody('Please find the attached INV details');
            semail.setFileAttachments(new Messaging.EmailFileAttachment[]{attach});
            Messaging.sendEmail(new Messaging.SingleEmailMessage[]{semail});
            sMessage='SUCCESS';
        }
        catch(Exception ex){
            sMessage=ex.getMessage()+'\n'+ex.getLineNumber()+'\n'+ex.getCause();
        }
        return sMessage;
    }
 }

Hello All,
I have a test class where I am updating a checkbox.  In the Apex Class this would create 2 new records.  The tets class fails when I perform the update.  The record I am updating exist since I checked in an assertion so not sure why I am getting an error:
 Attempt to de-reference a null object.
Would that tyupe of error message be due to information missing in my test data or the creation of the neww records?
Cheers,

P

public with sharing class ApplicationServices {

    public static final String APPLICATION_STATUS_DRAFT = 'Draft';
    public string coloTemplateName;

    public static List<ApplicationProjectTemplateConfig__mdt> templateConfigs = [SELECT Id,ApplicationCriteria__c,ProjectTemplateName__c from ApplicationProjectTemplateConfig__mdt];
     
    public static Map<String, SObject> templatesByNameMap {
        get{
            if(templatesByNameMap == null){
                list<Project_Template__c> templates = [Select Id, Name FROM Project_Template__c WHERE 
Active__c =: true];
                templatesByNameMap = PGE_EDSUtils.createMapByStringFieldSingleObject(templates, 'Name');
            }

            return templatesByNameMap;
        }
        private set;
    }

    public static void handleSubmit(Map<Id, Application__c> applications) {
        // Only before update
        if( !Trigger.isBefore || !Trigger.isUpdate ) {
            return;
        }
      
        // Determine the projects to create, if any
        Map<Application__c, Project__c> projectsToCreate = new Map<Application__c, Project__c>();
        for(Application__c application : applications.values()) {
            boolean docreate = shouldCreateColoProject(application);
            if( docreate ) {
                Project__c project = createColoProject(application);
                   if(project != null){
                        projectsToCreate.put(application, project);
                    }
            }
        }


///no code coverage
        if(projectsToCreate.size() > 0) {
            insert projectsToCreate.values();
            for(Application__c application : projectsToCreate.keySet()) {
                Project__c project = projectsToCreate.get(application);
                application.Project__c = project.Id;
                application.Date_Submitted__c = application.Date_Submitted__c == null
                                                ? System.today()
                                                : application.Date_Submitted__c ;
            }
        }
    }

///no code coverage
     public static String coloTemplateName {
        get {
            if(coloTemplateName == null) {
                coloTemplateName = AppConfig.getAppConfigValue('COL_PROJECT_TEMPLATE');
            }
            return coloTemplateName;
        }
        private set;
    }

///no code coverage
    public static Id coloTemplateId {
        get {
            if(coloTemplateId == null) {
                if(String.isNotEmpty(coloTemplateName)) {
                    Project_Template__c template = [SELECT Id 
                                                                 FROM Project_Template__c
                                                                 WHERE Name =: coloTemplateName LIMIT 1];
                    coloTemplateId = template.Id;
                }
            }
            return coloTemplateId;
        }
        private set;
    }


    public static Boolean shouldCreateColoProject(Application__c application) {
        return !isDraft(application) && !hasProject(application);
    }

    private static Boolean isDraft(Application__c application) {
        return application.Application_Status__c == APPLICATION_STATUS_DRAFT;
    }

    private static Boolean hasProject(Application__c application) {
        return application.Project__c != null;
    }

  
    public static Project__c createColoProject(Application__c application) {
        Project__c project = null;
        string projectTemplate;
   
        for( ApplicationProjectTemplateConfig__mdt  config :templateConfigs){
            boolean templatematch = BooleanLogicEvaluation.evaluate(application , config.ApplicationCriteria__c);
     
            if(templatematch){
                projectTemplate = config.ProjectTemplateName__c;
                break;
            }
         } 
      
         if (projectTemplate!=null && templatesByNameMap.containsKey(projectTemplate)){
           // no code coverage
            project = new Project__c(
                AccountSite__c =  application.AccountSite__c 
                OwnerId = application.ownerId,
                application__c = application.Id,
                ProjectTemplate__c = templatesByNameMap.get(projectTemplate).id,
                Project_Start_Date_A__c = System.today()
            );
         }

        return project;
    }

}

static testMethod void testApplicationBasicCRUD() {
    	AccountSite__c  as = [SELECT Id FROM AccountSite__c LIMIT 1];
        Test.startTest();

        Application__c application = new Application__c(
            Application_Type__c = 'NewAgreement',
            Scope_of_Work__c = 'Test Setup',
            AccountSite__c = as.Id
        );
        insert application;
        System.assert(application.Id != null, 'Successfully created application');

        // Update
        application.Tenant_AccountSite_Name__c = ' Mountain';
        application.Tenant_AccountSite_Number__c = '123';
        update application;
        System.assert(application.Id != null, 'Successfully updates application');

        // Delete
        delete application;
        System.assert(true, 'Successfully deleted application');

        Test.stopTest();
    }

    static testMethod void testAutomaticProjectCreation() {
    	AccountSite__c  as= [SELECT Id FROM AccountSite__c  LIMIT 1];

        Test.startTest();
        Application__c application = new Application__c(
            Application_Type__c = 'NewAgreement',
            Scope_of_Work__c = 'Test Setup',
            Date_Submitted__c = System.today(),
            AccountSite__c = as.Id
        );
        insert application;

        application.Application_Status__c = 'Feasibility';
        application.Approval_Status__c = 'Pending';
        update application;
        
        application = [SELECT id, Project__c,  Date_Submitted__c FROM Application__c where id=: application.Id];
        System.assertEquals(System.today(), application.Date_Submitted__c, 'Date Submitted Set');
     
        Test.stopTest();
    }


    @testSetup
    private static void createTestData() {

       
        AccountSite__c as = new AccountSite__c (
            Name = 'Casterly Rock'
        );
        insert as;

      
        Project_Template__c template = new Project_Template__c (
            Name = 'Collocation',
            Active__c = true,
            Object__c  = 'Project__c',
            Project_Extension_Objects__c = 'Coll_Project__c'
        );
        insert template;

        Collocation__c collocation = new Collocation__c (
            Name = '100ft',
            AccountSite__c = as.Id
        );
        insert collocation;

        Application__c application = new Application__c (
            Application_Type__c = 'NewAgreement',
            Scope_of_Work__c = 'Test Setup',
            AccountSite__c = as.Id
        );
        insert application;

    }


}

cdl.ShareType = 'I';
cdl.Visibility = 'InternalUsers';

//Get attachment
Attachment attach = [SELECT Id, Name, Body, ContentType, ParentId From Attachment LIMIT 1];
 
//Insert ContentVersion
ContentVersion cVersion = new ContentVersion();
cVersion.ContentLocation = 'S';
cVersion.PathOnClient = attach.Name;
cVersion.Origin = 'H';
cVersion.OwnerId = attach.OwnerId;
cVersion.Title = attach.Name;
cVersion.VersionData = attach.Body;
Insert cVersion;
 
//After saved the Content Verison, get the ContentDocumentId
Id conDocument = [SELECT ContentDocumentId FROM ContentVersion WHERE Id =:cVersion.Id].ContentDocumentId;
 
//Insert ContentDocumentLink
ContentDocumentLink cDocLink = new ContentDocumentLink();
cDocLink.ContentDocumentId = conDocument;//Add ContentDocumentId
cDocLink.LinkedEntityId = attach.ParentId;//Add attachment parentId
cDocLink.ShareType = 'I';
cDocLink.Visibility = 'InternalUsers';
Insert cDocLink;

global class AttachmentTriggerHandler r{
    
    Map<Id, List<ContentDocumentLink>> linkMap = new Map<Id, List<ContentDocumentLink>>();
    Map<String, Directory__c> directoryMap = new Map<String, Directory__c>();
    List<ContentDocumentLink> cdl_List = new List<ContentDocumentLink>();
    public ContentDocumentLink cdl = New ContentDocumentLink();
    List<Attachment__c> categoryvals = new List<Attachment__c>();
    public String parentId;
    public String catvalue;
    public String folderparentId;
    public string parentObjectType;
    public Map<Id,Programme__c> ProgrammeMap = new Map<Id,Programme__c>();
    public Map<Id,Permit__c>  PermitMap  = new Map<Id,Permit__c>();

    global override void bulkBeforeExtended() {
        if( Trigger.isUpdate ){
            List<Id> docIds = new List<Id>();
            List<String> parentIds = new List<String>();
            List<Id> progRecordIds = new List<Id>();
            List<Id> perRecordIds = new List<Id>();
                   
            for( Attachment__c attrecord : ( List<Attachment__c> ) Trigger.new ){
                Id recId = Id.valueOf(attrecord.Parent_ID__c ); 
                parentObjectType = String.valueOf( recId.getSObjectType());

                if(parentObjectType == 'Programme__c' ){
                    progRecordIds.add(attrecord.Parent_ID__c);
                }
                if(parentObjectType == 'Permit__c' ){
                    perRecordIds.add(attrecord.Parent_ID__c);
                }
            }
            if (!progRecordIds.isEmpty()) {
                programmeMap.putall([Select Project__c from Programme__c WHERE Id =: ProgRecordIds]);  
            }
            if (!perRecordIds.isEmpty()) {
                permitMap.putall([Select Project__c from Permit__c WHERE Id =: perRecordIds]); 
            }
            if (!jobRecordIds.isEmpty()) {
                jobMap.putall([Select Project__c from Job__c WHERE Id =: JobRecordIds]);
            }
          
            for( Attachment__c record : ( List<Attachment__c> ) Trigger.new ){
                Id docId = record.ContentDocumentId__c;
                    parentId = record.Parent_ID__c ;
                    Id recId = Id.valueOf(record.Parent_ID__c ); 
                    parentObjectType = String.valueOf( recId.getSObjectType() );
       
                    if( ProgrammeMap.containsKey(record.Parent_ID__c)){ 
                        for(Programme__c prog :ProgrammeMap.values()){
                            parentId = prog.Project__c;
                        }
                    }
                    if( PermitMap.containsKey(record.Parent_ID__c)){ 
                        parentId = record.Proj__c;
                        record.sobject__c ='Project';
                    }
                    }
                 
                    if( docId != null ){    
                        docIds.add( docId );
                    }
                  
                    if( parentId != null ){    
                        parentIds.add( parentId );
                    } 
                  
                    if( record.sobject__c != null ){    
                        categoryvals.add( record );
                    }       
            }

            list<Directory__c> dirs = [
                SELECT id,Directory_Template__c,Name,ParentId__c,Sobject__c,
                    (Select Id,Name, Directory__c, Folder_Template__c,Parent_File_Folder__c FROM File_Folders__r ORDER BY Name)
                FROM Directory__c 
                WHERE ParentId__c IN: parentIds
            ];
           
            if( !dirs.isEmpty() ){
                for( Directory__c dir : dirs ){
                    this.directoryMap.put( dir.ParentId__c, dir );
                }
            }

            List<ContentDocumentLink> linkList = [ SELECT Id, ContentDocumentId, LinkedEntityId FROM ContentDocumentLink WHERE ContentDocumentId IN: docIds ];
            if( !linkList.isEmpty() ){
                for( ContentDocumentLink link : linkList ){
                    List<ContentDocumentLink> links = this.linkMap.containsKey( link.ContentDocumentId )
                        ? this.linkMap.get( link.ContentDocumentId ) : new List<ContentDocumentLink>();
                    links.add( link );
                    this.linkMap.put( link.ContentDocumentId, links );
                }
            }
        }
    }
    global override void bulkAfterExtended() {
    }

    global override void beforeInsertExtended(SObject so) {
        Attachment__c newAttachment = ( Attachment__c ) so;
        this.getObjectType(newAttachment);
    }
    global override void beforeUpdateExtended(SObject oldso, SObject newso) {
      	Attachment__c newAttachment = ( Attachment__c ) newSo;
        folderparentId = newAttachment.Parent_Id__c;
        Id recId = Id.valueOf(newAttachment.Parent_ID__c );
        parentObjectType = String.valueOf( recId.getSObjectType() );
        this.getParentObjectType(parentObjectType,newAttachment);      

        if( directoryMap.containsKey( folderparentId)){           
            Directory__c dir = this.directoryMap.get( folderparentId );
            List<File_Folder__c> folders = dir.File_Folders__r;
            system.debug('dir.File_Folders__r '+ dir.File_Folders__r);
            List<ContentDocumentLink> links = this.linkMap.get( newAttachment.ContentDocumentId__c );

            for (ContentDocumentLink cont : links ){
                for (File_Folder__c folder: folders ){
                    if(newattachment.Document_Type__c == folder.name ){
                        ContentDocumentLink cdl = new ContentDocumentLink();
                        cdl.LinkedEntityId = folder.Id;
                        cdl.ContentDocumentId = cont.ContentDocumentId;
                        cdl.ShareType = 'V';
                        cdl.Visibility = 'AllUsers';
                        newAttachment.File_Folder__c = folder.Id;
                        cdl_List.add(cdl);
                        break;
                    }
                }
            }
        }
    }
    global override void afterUpdateExtended(SObject oldso, SObject newso) {}
    global override void afterInsertExtended(SObject newso) {} 
    global override void andFinallyExtended() {
    
      if (!Trigger.isDelete) {
            if (Trigger.isUpdate) {
                try {
                    if (cdl_List.size() > 0) {
                        insert cdl_List;
                    }
                } catch (Exception e) {
                    System.debug('Error: ' + e.getMessage());
                }
            }
        }

        if (!Trigger.isDelete) {
            if (Trigger.isInsert) {
                try {
                    if (categoryvals.size() > 0) {
                        update categoryvals;
                    }
                } catch (Exception e) {
                    System.debug('Error: ' + e.getMessage());
                }
            }
        }

    }

    private void getParentObjectType(String tempParentObjectType,Attachment__c newAttachment){
   
        if( tempParentObjectType == 'Programme__c'  ){
            folderparentId = parentId;
            newAttachment.sobject__c='Programme';
        }
        else{
            folderparentId = parentId;
            newAttachment.sobject__c='Project';
        }
    }

    private void getObjectType(Attachment__c newAttachment){
        if( this.linkMap.containsKey( newAttachment.ContentDocumentId__c ) ){
            List<ContentDocumentLink> links = this.linkMap.get( newAttachment.ContentDocumentId__c );
            if( !links.isEmpty() ){
                for( ContentDocumentLink link : links ){
                    String objectType = String.valueOf( link.LinkedEntityId.getSObjectType() );
                    Directory__c dir = this.directoryMap.containsKey( link.LinkedEntityId )
                        ? this.directoryMap.get( link.LinkedEntityId ) : null;
                    if( dir != null ){
                        switch on ( objectType ){
                            when 'Programme__c' {
                                newAttachment.Programme__c = link.LinkedEntityId;
                            }
         
                            when 'Permit__c' {
                               newAttachment.Permit__c = link.LinkedEntityId;
                            }
                            
                        }
                    }
                }
            }
        }
    }
}

@IsTest
private class AttachmentTriggerHandlerTest {
    @TestSetup
    static void setupTestData() {
        Directory_Template__c dirTemplate = new Directory_Template__c(
            Name = 'Directory Template Test',
            Sobject__c = 'Project',
            Active__c = true
        );
        insert dirTemplate;
    }

    @isTest
    private static void TestTriggerFunctions(){

        List<Directory_Template__c> dirTemplates = [
            SELECT Id
            FROM Directory_Template__c
        ];
        
        System.assertEquals( 1, dirTemplates.size(), '1 template found' );

        Programme__c prog = new Programme__c(
                Name = 'Test Program',
                Operator__c = 'MBNL',
                Directory_Template__c = dirTemplates[ 0 ].Id
        );
        insert prog;

        Attachment attach = new Attachment();       
        attach.Name='Test Attachment';
        Blob bodyBlob=Blob.valueOf('Test Attachment Body');
        attach.body=bodyBlob;
        attach.parentId=prog.id;
        insert attach;
        
        List<Attachment> attachments=[select id, name from Attachment where parent.id=:prog.id];
        System.assertEquals(1, attachments.size());

        Blob contentData = Blob.valueOf( 'Test File' );
        String documentName = 'testfile.txt';

        ContentVersion newDocument = new ContentVersion(
            Title = documentName,
            VersionData = contentData,
            PathOnClient = documentName
        );

        insert newDocument;

        List<ContentVersion> versionVerify = [
            SELECT Id, ContentDocumentId
            FROM ContentVersion
            WHERE Id =: newDocument.Id
        ];
        System.assertEquals( 1, versionVerify.size() );

        List<ContentDocument> documents = [
            SELECT Id
            FROM ContentDocument
            WHERE Id =: versionVerify[ 0 ].ContentDocumentId
        ];

        System.assertEquals( 1, documents.size() );

        ContentDocumentLink newLink = new ContentDocumentLink(
            LinkedEntityId = projects[ 0 ].Id,
            ContentDocumentId = documents[ 0 ].Id,
            ShareType = 'V',
            Visibility = 'AllUsers'
        );
        insert newLink;
    }
}

Attachment__c newAttachment = (Attachment__c ) so;
        String objectType;
        List<Plan__c > palnId = new List<Plan__c>();
        Map<String,String> planMap = new Map<String,String>();
        
        if( this.linkMap.containsKey( newAttachment.ContentDocumentId__c ) ){
            List<ContentDocumentLink> links = this.linkMap.get( newAttachment.ContentDocumentId__c );
            if( !links.isEmpty() ){
                for( ContentDocumentLink link : links ){
                    objectType = String.valueOf( link.LinkedEntityId.getSObjectType() );
                    switch on ( objectType ){
                        when 'Activity__c' {
                            newAttachment.Activity__c= link.LinkedEntityId;
                        }
                        when 'Project__c' {
                            newAttachment.Proj__c= link.LinkedEntityId;
                        }
                    }
                }
            }
    
            List<Plan__c> plans= new List<Plan__c>();

            for (ContentDocumentLink cont : links ){                    
                if(newAttachment.Activity__c != null || newAttachment.Proj__c != null){
                    ContentDocumentLink cdl = new ContentDocumentLink();
                    cdl.LinkedEntityId = parentId;
                    cdl.ContentDocumentId = cont.ContentDocumentId;
                    cdl.ShareType = 'V';
                    cdl.Visibility = 'AllUsers';
                    cdl_List.add(cdl);
                    break;
                }
            }
        }

if (!CustVal.isEmpty()) {
                CUSTOMERTEMP = new Map<Id,Customer_c>([SELECT Id, Name,Status__c FROM Customer__c);
                }

Map<Id, Sector__c> m_Sectors;
Map<Id, List<Sector__c>> m_sitesToSectors = new Map<Id, List<Sector__c>>();
List<Sector__c> sectorsToUpdate = new List<Sector__c>();

 public void bulkAfter(){{
 if (Trigger.IsUpdate && Trigger.isAfter) {
            for (SObject so : Trigger.New) {
                Candidate__c newCandidate = (Candidate__c) so;
               Candidate__c oldCandidate = (Candidate__c) Trigger.oldMap.get(newCandidate.Id);

if ((newCandidate.Primary_Candidate__c != oldCandidate.Primary_Candidate__c) && 
                     newCandidate.Primary_Candidate__c == true && newCandidate.Site__c != null) {                    candidateIdsPrimary.add(newCandidate.Id);                }

 if (!candidateIds.isEmpty()) {
                m_Sectors = new Map<Id, Sector__c>([SELECT Id,Candidate__c,Site__c FROM Sector__c WHERE Site__c = null AND Candidate__c IN: candidateIdsPrimary]);
            }

if (m_Sectors != null && !m_Sectors.isEmpty()){
                for (Sector__c sect : m_Sectors.values()) {
                    if (!m_sitesToSectors.containsKey(sect.Candidate__c)) {
                        m_sitesToSectors.put(sect.Candidate__c, new List<Sector__c>{sect});
                    }
                    else {
                        m_sitesToSectors.get(sect.Candidate__c).add(sect);
                    }
                }
            }

}

public void afterUpdate( SObject oldSo, SObject newSo ){

Candidate__c newCandidate = (Candidate__c) newSo;
Candidate__c oldCandidate = (Candidate__c) oldSo;

if (m_sitesToSectors.get(newCandidate.Id) != null && !m_sitesToSectors.get(newCandidate.Id).isEmpty()) {
            for (Sector__c sector: m_sitesToSectors.get(newCandidate.Id)) {
                sector.Site__c = m_sitesToSectors.get(newCandidate.Site__c); ---error here
                sectorsToUpdate.add(sector);
            }
        }

}

List<Directory_Template__c> directorytemplate =
            ([select id,Name from Directory_Template__c where Sobject__c = 'Project' AND Active__c = true limit 1]);
                for (Permit__c proj : (List<Permit__c >) trigger.New){
                    for (Directory_Template__c dir : directorytemplate)
                    {
                        if (dir.Id != null) { 
                            proj.Directory_Template__c = dir.Id; 
                        }
                    }
                }

global class ViewUtils {
    
    public static String getDirectory(String objectType){
     
        List<Directory_Template__c> directorytemplate = new List<Directory_Template__c>();
        system.debug('objectType '+ objectType);
            if(objectType  == 'Programme__c'){
                directorytemplate =
                ([select id,Name from Directory_Template__c where Sobject__c = 'Programme' AND Active__c = true limit 1]);
                    for (Programme__c prog : (List<Programme__c >) trigger.New){
                        for (Directory_Template__c dir : directorytemplate)
                        {
                            if (dir.Id != null) { 
                                return prog.Directory_Template__c = dir.Id; 
                            }
                        }
                    }
            } 
            else{
                directorytemplate =
                ([select id,Name from Directory_Template__c where Sobject__c = 'Project' AND Active__c = true limit 1]);
                    for (objectType proj : (List<objectType >) trigger.New){
                        for (Directory_Template__c dir : directorytemplate)
                        {
                            if (dir.Id != null) { 
                                return proj.Directory_Template__c = dir.Id; 
                            }
                        }
                    } 
            }   
        }
    }

ViewUtils.getDirectory('Permit__c');

Map<Id,Checklist__c> m_cl = new Map<Id, Checklist__c>();
Set<Id> checkListIds = new Set<Id>();
        Set<Id> prjIds = new Set<Id>();
        Set<Id> prjNcIds = new Set<Id>();
        Set<Id> checkListNcIds = new Set<Id>();

        if(Trigger.isUpdate) {            
            for (SObject so : Trigger.New) {
              Checklist__c newCL = (Checklist__c) so;
              Checklist__c oldCL = Trigger.oldMap != null && Trigger.oldMap.containsKey(newCL.Id)
                ? (Checklist__c) Trigger.oldMap.get(newCL.Id)
                : null;

                    if(newCL.Status__c != oldCL.Status__c && (newCL.Status__c == 'Complete' || oldCL.Status__c == 'In Progress')){
                        m_cl.put(newCL.Activity__c, newCL);
                        checkListIds.add(newCL.Id);
                        prjIds.add(newCL.Project__c);
                    }

            }

            if(checkListIds.size()> 0){
                act = [Select id,Name,Project__c, Project__r.RC_Completed__c, Project__r.M5_Completed__c,Checklist__r.Status__c,Checklist__r.Name,Checklist__c,Form_Complete__c
                      FROM Activity__c 
                      WHERE Form_Complete__c = false 
                      AND Checklist__c IN : checkListIds
                      ];

                prj = [Select id, Name, RC_Completed__c ,M5_Completed__c 
                       FROM Project__c 
                       WHERE Id IN : prjIds];
              
                if( act.size() > 0){
                    for(Activity__c acts : act){
                        formName = acts.Checklist__r.Name.split(':');    
                        if(formName[1] == 'Pre-M5 Check List Form' && m_cl.get('Status__c') == 'Complete'){
                            acts.M5_Completed__c = true;
                            actToUpdate.add(acts);
                        }
                        else {
                            acts.RC_Completed__c = true;
                            actToUpdate.add(acts);
                        }
                    }
                }

public  class UpdateLeaseQueueable implements Queueable {
    
    List<Lease__c> updateLeases = new List<Lease__c>();

    public UpdateLeaseQueueable( Map<Id, Lease__c> leases) {
        updateLeases.addAll(leases.Values());
    }

    public void execute(QueueableContext qc) {  

        if (!updateLeases.isEmpty()) { 
           //pass leases to Batch class
        }
    }
}

global class UpdateLeaseQueueableBatch implements Database.Batchable <sObject>, Database.Stateful{
   
    global Database.QueryLocator start(Database.BatchableContext bc){
        
    }
    
    global void execute(Database.BatchableContext bc, List<> listLease){
       
    }
    
    global void finish(Database.BatchableContext bc){
    }
}

public with sharing class PDF_EmailController {
    
    @auraEnabled

    public static void SendAttachment(String recordId){
           
        for(Purchase_Order_Request__c por : [SELECT Id, Email_Address__c FROM Purchase_Order__c
        WHERE Id =: recordId]){
            Messaging.SingleEmailMessage semail = new Messaging.SingleEmailMessage();
            Messaging.EmailFileAttachment attach = new Messaging.EmailFileAttachment();

            PageReference pref = page.POPDF;
            pref.getParameters().put('Id',por.Id);
            pref.setRedirect(true);
            Blob b = pref.getContent();
            attach.setFileName('POR.pdf');
            attach.setBody(b);
            semail.setSubject('Purchase Order Request Details');
            semail.setToAddresses(new String[] { por.Email_Address__c });
            semail.setPlainTextBody('Please find the attached POR details');
            semail.setFileAttachments(new Messaging.EmailFileAttachment[]{attach});
            Messaging.sendEmail(new Messaging.SingleEmailMessage[]{semail});

        }

        for(Purchase_Order_Request__c por : [SELECT Id, Email_Address__c,Version__c FROM Purchase_Order__c
                                             WHERE Id =: recordId]){
            PageReference PDf =  Page.PORequestPDF;
            PDf.getParameters().put('Id',por.Id);
            PDf.setRedirect(true);
            Attachment attach = new Attachment();
            Blob b ;
            b = PDf.getContent();
            attach.Body = b;
            attach.Name = 'Purchase Order Confirmation ' + System.today();
            attach.IsPrivate = false;
            attach.ParentId = por.Id;
            insert attach;

        }
    }
 }



Visualforce Page

<apex:page controller="PDF_EmailController" standardStylesheets="false" showHeader="false">    
    <center>
        <P style="font-size:22px;"><u>Send Purchase Order Request</u></P>
        <input type="text" value="" id="txtEmailAddress"/><br/><br/>
        <input type="button" onclick="SendEmailAttachment();" value="Send"/>
    </center>
    <script>
    function SendEmailAttachment(){
        var PORId = '{!$CurrentPage.parameters.Id}';
        var emailAddress=document.getElementById('txtEmailAddress').value;
        if(emailAddress!=null && emailAddress!=''){
            TestHandler.SendAttachment(emailAddress,porId,function(result,event){
                if(event.status){
                    if(result=='SUCCESS'){
                        alert('Email sent successfully.');
                    }
                    else{
                        alert(result);
                    }
                }
            })
        }
        else{
            alert('Please provide email address!');
        }
    }
    </script>
 </apex:page>

public with sharing class RequestPDF_EmailController {
    
    @RemoteAction
    public static string SendAttachment(String sEmailAddress, String tempId){
        String sMessage='';
        try{            
            Messaging.SingleEmailMessage semail = new Messaging.SingleEmailMessage();
            Messaging.EmailFileAttachment attach = new Messaging.EmailFileAttachment();

            PageReference pref = page.RequestPDF;
            pref.getParameters().put('id',tempId);
            pref.setRedirect(true);
            Blob b = pref.getContent();
            attach.setFileName('AttachedInV.pdf');
            attach.setBody(b);
            semail.setSubject('Inv Details');
            semail.setToAddresses(new List<String>{sEmailAddress});
            semail.setPlainTextBody('Please find the attached INV details');
            semail.setFileAttachments(new Messaging.EmailFileAttachment[]{attach});
            Messaging.sendEmail(new Messaging.SingleEmailMessage[]{semail});
            sMessage='SUCCESS';
        }
        catch(Exception ex){
            sMessage=ex.getMessage()+'\n'+ex.getLineNumber()+'\n'+ex.getCause();
        }
        return sMessage;
    }
 }

public with sharing class ApplicationServices {

    public static final String APPLICATION_STATUS_DRAFT = 'Draft';
    public string coloTemplateName;

    public static List<ApplicationProjectTemplateConfig__mdt> templateConfigs = [SELECT Id,ApplicationCriteria__c,ProjectTemplateName__c from ApplicationProjectTemplateConfig__mdt];
     
    public static Map<String, SObject> templatesByNameMap {
        get{
            if(templatesByNameMap == null){
                list<Project_Template__c> templates = [Select Id, Name FROM Project_Template__c WHERE 
Active__c =: true];
                templatesByNameMap = PGE_EDSUtils.createMapByStringFieldSingleObject(templates, 'Name');
            }

            return templatesByNameMap;
        }
        private set;
    }

    public static void handleSubmit(Map<Id, Application__c> applications) {
        // Only before update
        if( !Trigger.isBefore || !Trigger.isUpdate ) {
            return;
        }
      
        // Determine the projects to create, if any
        Map<Application__c, Project__c> projectsToCreate = new Map<Application__c, Project__c>();
        for(Application__c application : applications.values()) {
            boolean docreate = shouldCreateColoProject(application);
            if( docreate ) {
                Project__c project = createColoProject(application);
                   if(project != null){
                        projectsToCreate.put(application, project);
                    }
            }
        }


///no code coverage
        if(projectsToCreate.size() > 0) {
            insert projectsToCreate.values();
            for(Application__c application : projectsToCreate.keySet()) {
                Project__c project = projectsToCreate.get(application);
                application.Project__c = project.Id;
                application.Date_Submitted__c = application.Date_Submitted__c == null
                                                ? System.today()
                                                : application.Date_Submitted__c ;
            }
        }
    }

///no code coverage
     public static String coloTemplateName {
        get {
            if(coloTemplateName == null) {
                coloTemplateName = AppConfig.getAppConfigValue('COL_PROJECT_TEMPLATE');
            }
            return coloTemplateName;
        }
        private set;
    }

///no code coverage
    public static Id coloTemplateId {
        get {
            if(coloTemplateId == null) {
                if(String.isNotEmpty(coloTemplateName)) {
                    Project_Template__c template = [SELECT Id 
                                                                 FROM Project_Template__c
                                                                 WHERE Name =: coloTemplateName LIMIT 1];
                    coloTemplateId = template.Id;
                }
            }
            return coloTemplateId;
        }
        private set;
    }


    public static Boolean shouldCreateColoProject(Application__c application) {
        return !isDraft(application) && !hasProject(application);
    }

    private static Boolean isDraft(Application__c application) {
        return application.Application_Status__c == APPLICATION_STATUS_DRAFT;
    }

    private static Boolean hasProject(Application__c application) {
        return application.Project__c != null;
    }

  
    public static Project__c createColoProject(Application__c application) {
        Project__c project = null;
        string projectTemplate;
   
        for( ApplicationProjectTemplateConfig__mdt  config :templateConfigs){
            boolean templatematch = BooleanLogicEvaluation.evaluate(application , config.ApplicationCriteria__c);
     
            if(templatematch){
                projectTemplate = config.ProjectTemplateName__c;
                break;
            }
         } 
      
         if (projectTemplate!=null && templatesByNameMap.containsKey(projectTemplate)){
           // no code coverage
            project = new Project__c(
                AccountSite__c =  application.AccountSite__c 
                OwnerId = application.ownerId,
                application__c = application.Id,
                ProjectTemplate__c = templatesByNameMap.get(projectTemplate).id,
                Project_Start_Date_A__c = System.today()
            );
         }

        return project;
    }

}

static testMethod void testApplicationBasicCRUD() {
    	AccountSite__c  as = [SELECT Id FROM AccountSite__c LIMIT 1];
        Test.startTest();

        Application__c application = new Application__c(
            Application_Type__c = 'NewAgreement',
            Scope_of_Work__c = 'Test Setup',
            AccountSite__c = as.Id
        );
        insert application;
        System.assert(application.Id != null, 'Successfully created application');

        // Update
        application.Tenant_AccountSite_Name__c = ' Mountain';
        application.Tenant_AccountSite_Number__c = '123';
        update application;
        System.assert(application.Id != null, 'Successfully updates application');

        // Delete
        delete application;
        System.assert(true, 'Successfully deleted application');

        Test.stopTest();
    }

    static testMethod void testAutomaticProjectCreation() {
    	AccountSite__c  as= [SELECT Id FROM AccountSite__c  LIMIT 1];

        Test.startTest();
        Application__c application = new Application__c(
            Application_Type__c = 'NewAgreement',
            Scope_of_Work__c = 'Test Setup',
            Date_Submitted__c = System.today(),
            AccountSite__c = as.Id
        );
        insert application;

        application.Application_Status__c = 'Feasibility';
        application.Approval_Status__c = 'Pending';
        update application;
        
        application = [SELECT id, Project__c,  Date_Submitted__c FROM Application__c where id=: application.Id];
        System.assertEquals(System.today(), application.Date_Submitted__c, 'Date Submitted Set');
     
        Test.stopTest();
    }


    @testSetup
    private static void createTestData() {

       
        AccountSite__c as = new AccountSite__c (
            Name = 'Casterly Rock'
        );
        insert as;

      
        Project_Template__c template = new Project_Template__c (
            Name = 'Collocation',
            Active__c = true,
            Object__c  = 'Project__c',
            Project_Extension_Objects__c = 'Coll_Project__c'
        );
        insert template;

        Collocation__c collocation = new Collocation__c (
            Name = '100ft',
            AccountSite__c = as.Id
        );
        insert collocation;

        Application__c application = new Application__c (
            Application_Type__c = 'NewAgreement',
            Scope_of_Work__c = 'Test Setup',
            AccountSite__c = as.Id
        );
        insert application;

    }


}

//Get attachment
Attachment attach = [SELECT Id, Name, Body, ContentType, ParentId From Attachment LIMIT 1];
 
//Insert ContentVersion
ContentVersion cVersion = new ContentVersion();
cVersion.ContentLocation = 'S';
cVersion.PathOnClient = attach.Name;
cVersion.Origin = 'H';
cVersion.OwnerId = attach.OwnerId;
cVersion.Title = attach.Name;
cVersion.VersionData = attach.Body;
Insert cVersion;
 
//After saved the Content Verison, get the ContentDocumentId
Id conDocument = [SELECT ContentDocumentId FROM ContentVersion WHERE Id =:cVersion.Id].ContentDocumentId;
 
//Insert ContentDocumentLink
ContentDocumentLink cDocLink = new ContentDocumentLink();
cDocLink.ContentDocumentId = conDocument;//Add ContentDocumentId
cDocLink.LinkedEntityId = attach.ParentId;//Add attachment parentId
cDocLink.ShareType = 'I';
cDocLink.Visibility = 'InternalUsers';
Insert cDocLink;

Map<Id, Sector__c> m_Sectors;
Map<Id, List<Sector__c>> m_sitesToSectors = new Map<Id, List<Sector__c>>();
List<Sector__c> sectorsToUpdate = new List<Sector__c>();

 public void bulkAfter(){{
 if (Trigger.IsUpdate && Trigger.isAfter) {
            for (SObject so : Trigger.New) {
                Candidate__c newCandidate = (Candidate__c) so;
               Candidate__c oldCandidate = (Candidate__c) Trigger.oldMap.get(newCandidate.Id);

if ((newCandidate.Primary_Candidate__c != oldCandidate.Primary_Candidate__c) && 
                     newCandidate.Primary_Candidate__c == true && newCandidate.Site__c != null) {                    candidateIdsPrimary.add(newCandidate.Id);                }

 if (!candidateIds.isEmpty()) {
                m_Sectors = new Map<Id, Sector__c>([SELECT Id,Candidate__c,Site__c FROM Sector__c WHERE Site__c = null AND Candidate__c IN: candidateIdsPrimary]);
            }

if (m_Sectors != null && !m_Sectors.isEmpty()){
                for (Sector__c sect : m_Sectors.values()) {
                    if (!m_sitesToSectors.containsKey(sect.Candidate__c)) {
                        m_sitesToSectors.put(sect.Candidate__c, new List<Sector__c>{sect});
                    }
                    else {
                        m_sitesToSectors.get(sect.Candidate__c).add(sect);
                    }
                }
            }

}

public void afterUpdate( SObject oldSo, SObject newSo ){

Candidate__c newCandidate = (Candidate__c) newSo;
Candidate__c oldCandidate = (Candidate__c) oldSo;

if (m_sitesToSectors.get(newCandidate.Id) != null && !m_sitesToSectors.get(newCandidate.Id).isEmpty()) {
            for (Sector__c sector: m_sitesToSectors.get(newCandidate.Id)) {
                sector.Site__c = m_sitesToSectors.get(newCandidate.Site__c); ---error here
                sectorsToUpdate.add(sector);
            }
        }

}