Test class:

/*
 * @description - This class is the test class for WOD_ProjectTriggerHandler,WOD_BusinessRules_ACK_DOC_Helper and WOD_ProjectDataService
 */
@isTest
public with sharing class WOD_ProjectTriggerHandlerTest {
    public WOD_ProjectTriggerHandlerTest() {
    }
    @testSetup
    public static void runTestSetup(){
        Test.startTest();
        WOD_DataFactoryTest.createAckBusinessRule();
        WOD_DataFactoryTest.createDocumentBusinessRule();
        twod_bm__Project__c project =  WOD_DataFactoryTest.createProject();
        project.twod_bm__Project_Status__c = 'Submitted';
        project.twod_bm__Is_Migrated_Data__c = true;
       // update project;
        
        // Adding Strategic Account also
        Account acc = WOD_DataFactoryTest.createAccount();
        acc.twod_bm__Strategic_Account__c = true;
        update acc;
        
        WOD_2__Inventory__c inventory =  WOD_DataFactoryTest.createInventory(project.Id);
        inventory.twod_bm__Inventory_Status__c = 'Pending Review';
        inventory.twod_bm__Guarantee_Issued__c = false;
        inventory.twod_bm__Strategic_Building__c = true;
        inventory.twod_bm__Strategic_AccountName__c = acc.id;
        inventory.twod_bm__Strategic_Price_Available__c = true;
        update inventory;
        
        WOD_2__Inventory__c inv = WOD_DataFactoryTest.createInventory(project.Id);
        inv.twod_bm__Guarantee_Issued__c = true;
        inv.twod_bm__Admin_Review__c = true;
        inv.twod_bm__Specification_Check__c = true;
        inv.twod_bm__Is_Building_Approved__c = true;
        
        update inv;
        
        twod_bm__Inspection__c ins = WOD_DataFactoryTest.createInspection(inv.id);
        ins.twod_bm__Type__c = 'Final Inspection';
        ins.twod_bm__Status__c = 'Pending Inspection';
        ins.twod_bm__Inspection_Rating__c = 'Conditionally accepted with Punchlist';
        update ins;
        
        twod_bm__Customer_Communication__c custComm = new twod_bm__Customer_Communication__c();
        custComm.twod_bm__Building__c = inventory.id;
        custComm.twod_bm__Status__c = 'Awaiting Response';
        //insert custComm;
        
        WOD_2__Warranty_Registration__c objwarranty= WOD_DataFactoryTest.createWarrantyRegistration(inventory.id);
        
        Test.stopTest();
    }
    @IsTest
    static void handlerMethods(){
        test.startTest();
        Account acc = new Account();
        acc.Name = 'Test Property Owner';
       // insert acc;

        twod_bm__Project__c proj = WOD_DataFactoryTest.createProject();
        WOD_2__Inventory__c inv = WOD_DataFactoryTest.createInventory(proj.Id);
        
        WOD_2__Warranty_Registration__c objwarranty= WOD_DataFactoryTest.createWarrantyRegistration(inv.id);
        Assembly__c ass = WOD_DataFactoryTest.createAssembly(inv.Id);
        WOD_DataFactoryTest.createAssemblydetail(ass.Id);

        proj.twod_bm__Property_Owner__c = acc.Id;
        proj.twod_bm__Submitted_Internally__c = true;
        proj.twod_bm__Project_Status__c = 'Submitted';
       // update proj;
        
        proj.twod_bm__General_Contractor__c = acc.Id;
       // update proj;
        WOD_ProjectTriggerHandler.createOpenItems(new List<twod_bm__Project__c>{proj});
        test.stopTest();
    }
    
    @IsTest
    static void handlerMethodsForDelete(){
        test.startTest();
        Account acc = new Account();
        acc.Name = 'Test Property Owner';
        //insert acc;

        twod_bm__Project__c proj = WOD_DataFactoryTest.createProject();
        WOD_2__Inventory__c inv = WOD_DataFactoryTest.createInventory(proj.Id);
        
        WOD_2__Warranty_Registration__c objwarranty= WOD_DataFactoryTest.createWarrantyRegistration(inv.id);
        Assembly__c ass = WOD_DataFactoryTest.createAssembly(inv.Id);
        WOD_DataFactoryTest.createAssemblydetail(ass.Id);
        proj.twod_bm__Property_Owner__c = acc.Id;
        proj.twod_bm__Submitted_Internally__c = true;
        proj.twod_bm__Project_Status__c = 'Submitted';
        //update proj;
        
        proj.twod_bm__General_Contractor__c = acc.Id;
       // update proj;
        delete proj;
        test.stopTest();
    }
}