test class for handler trigger is not covered - unit-testing

Question

I did a trigger on content version ,but my handler class is not covered ,can you please explain to me why ?
please find below the code and screenshots for non covered lines
in my test class ,i created all data needed for the handler class i call the method with content version input
Trigger:
trigger contentversiontrigger on ContentVersion (before insert, before update, before delete, after insert, after update, after delete, after undelete) {
if(trigger.isAfter && trigger.isInsert) {
Bytel_ContentVersionTriggerHandler.AlignAttachementsWithOpportunity(Trigger.New);
}
}
Trigger Handler
public with sharing class Bytel_ContentVersionTriggerHandler extends TriggerHandler {
public static void AlignAttachementsWithOpportunity(List<ContentVersion> contentVersion) {
Set<Id> contentDocumentIdSet = new Set<Id>();
String Contractid;
String Opportunityid;
for (ContentVersion cv : contentVersion) {
if(cv.ContentDocumentId != null)
{
contentDocumentIdSet.add(cv.ContentDocumentId);
}
}
list<ContentDocumentLink> cdl = [SELECT ContentDocumentId, LinkedEntityId FROM ContentDocumentLink WHERE ContentDocumentId IN:contentDocumentIdSet];
id LinkedEntityId =cdl[0].LinkedEntityId ;
// List<Contract> contractList = [SELECT Id, name FROM Contract where Id =:cdl.LinkedEntityId];
list<contract> Contracts = [SELECT Id, name FROM Contract where Id =:LinkedEntityId ];
if (!Contracts.isEmpty())
{
Contractid=Contracts[0].Id;
}
// Id Contractid = [SELECT Id, name FROM Contract where Id ='8005t0000001UQFAA2' limit 1].Id;
system.debug('test trigger' +Contractid) ;
// String Contractid= String.valueof(contractList[0].Id);
system.debug('ContractId' +Contractid) ;
list<Contract> contractssecond=[SELECT id ,vlocity_cmt__OpportunityId__c FROM Contract WHERE id =:Contractid limit 1];
if (!contractssecond.isEmpty())
{
Opportunityid=contractssecond[0].vlocity_cmt__OpportunityId__c;
}
system.debug('Opportunityid' +Opportunityid) ;
Id conDoc = cdl[0].ContentDocumentId;
//if (Opportunityid!=Null & conDoc!=Null) {
if (Opportunityid!=Null ) {
//create ContentDocumentLink record
ContentDocumentLink conDocLink = New ContentDocumentLink();
conDocLink.LinkedEntityId = Opportunityid;
conDocLink.ContentDocumentId = conDoc; //ContentDocumentId Id from ContentVersion
conDocLink.shareType = 'V';
insert conDocLink;
}
}
}
Test class of handler
#isTest
public class Bytel_ContentVersionTriggerHandlerTest {
static testMethod void createattachememtns() {
insert Bytel_TestDataFactory.createByPassSettings(false); // Custom setting bypass profile
insert Bytel_TestDataFactory.createGlobalVariableSettings(); // Custom setting globalVaribale, parameter callout end-point
insert Bytel_TestDataFactory.createOpportunityRaisonEchecSettings();
insert Bytel_TestDataFactory.createOpportunityStatusSettings();
Account acc = new Account(
Name = 'Test Account',
TypeIdentifiant__c = 'SIREN',
SIREN__c = '123765982',
Statut__c = 'Prospect'
);
insert acc;
Opportunity opp = Bytel_TestDataFactory.createOpportunity(
'FILL AUTO',
'Etape10',
acc.Id,
null
);
opp.Tech_AccountIdToDelete__c = acc.id;
opp.ScoringFinancier__c = 'Vert';
opp.siren__c = '123765981';
insert opp;
Quote quote = new Quote(Name = 'devis1', OpportunityId = opp.Id);
insert quote;
Contract contract1 = new Contract(
vlocity_cmt__QuoteId__c = quote.Id,
vlocity_cmt__OpportunityId__c=opp.id,
AccountId = acc.id
);
insert contract1;
Contract contract2 = new Contract(
vlocity_cmt__QuoteId__c = quote.Id,
AccountId = acc.id,
vlocity_cmt__OpportunityId__c=opp.id
);
insert contract2;
Blob bodyBlob=Blob.valueOf('Unit Test ContentVersion Body to be insert in test class for testing the');
ContentVersion contentVersion_1 = new ContentVersion(
Title='SampleTitle',
PathOnClient ='SampleTitle.txt',
Type_de_Fichier__c='RIB',
VersionData = bodyBlob,
origin = 'H'
);
insert contentVersion_1;
Contract contra = [SELECT Id
FROM Contract WHERE Id = :contract1.Id LIMIT 1];
List<ContentVersion> contentVersion_2 = [SELECT Id, Title, ContentDocumentId
FROM ContentVersion WHERE Id = :contentVersion_1.Id ];
// ContentDocumentLink contentlink = new ContentDocumentLink();
// contentlink.LinkedEntityId = contra.id;
// contentlink.contentdocumentid = contentVersion_2.contentdocumentid;
// contentlink.ShareType = 'V';
// insert contentlink;
Bytel_ContentVersionTriggerHandler.AlignAttachementsWithOpportunity(contentVersion_2);
}
}

Answer 1

After a first look, I guess you forgot to add #isTest to your test method.
#isTest
static testMethod void createattachememtns() {
//Your Code
}