Hi, kindly assists me to fix my coverage code. My scenario is once users submit a record(parent record), they cannot delete/edit the child record as well. Only the admin can edit or delete. 

trigger preventDelete on ChildRecord__c (before delete) {
    
    Id profileId=userinfo.getProfileId();
    String profileName=[Select Name from Profile where Id=:profileId].Name;
    
    Set < ID > testentry = New Set < ID > ();
    
    for (ChildRecord__c tst: trigger.old) {
        testentry.add(tst.ParentRecord__c );
    }
    
    set<id> mdrRecord = new map<id,ParentRecord__c>([Select Id From ParentRecord__c Where (Approval_Status__c= 'pending' OR Approval_Status__c LIKE '%Approved by%') and Id IN: testentry]).keyset();
    
    for (ChildRecord__c record : trigger.old){
        if (!FeatureManagement.checkPermission('Admin_Can_Delete')){
            
            If(mdrRecord.contains(record.ParentRecord__c)){
                record.addError('This record is locked. If you need to delete it, contact your admin.');
            } 
        }
    }
}

Here is my code coverage. I am not sure why it gives me 0% coverage. 

@isTest (SeeAllData=false)
public class preventDeleteTest {
    
    @isTest
    public static void DeletetestPositive(){
        try {            
            Test.startTest();            
            Profile prof = [SELECT Id FROM Profile WHERE Name = 'Marketer']; //get a profile Id
            User testUser = new User(Alias = 'SLYEODDNG', Email = 'slyeoddng@ve.com.invalid', EmailEncodingKey = 'UTF-8', FirstName = 'YEODDNG', LanguageLocaleKey = 'en_US', LastName = 'SUET LESEDSS', LocaleSidKey = 'en_MY', ProfileId = prof.Id, TimeZoneSidKey = 'Asia/Kuala_Lumpur', Username = 'slyeong@ve.com.devcr'); 
            insert testUser;
            System.runAs(testUser) {
                
                ChildRecord__c MDRLineItem = new ChildRecord__c();
                MDRLineItem.Option__c = 'OEerfrMi';
                MDRLineItem.Product__c = 'Nitrilffee PF Polymer';
                MDRLineItem.Packing_Style__c = '4ff3';
                MDRLineItem.Brand_Name__c = 'gggkkjhk';
                MDRLineItem.Brand_Name_OBM__c= '- N/A -';
                MDRLineItem.Weight_Code__c = 'ENW035';
                MDRLineItem.Colour__c = 'BRN frefBlue';
                MDRLineItem.Flavour__c= 'Leerfmon';
                MDRLineItem.Length__c= '270mm';
                MDRLineItem.Surface__c= 'Double Embossed';
                MDRLineItem.Size__c= 'XrefS';
                MDRLineItem.Manufacturer_OEMi_OBM__c= 'Senterfienxerferfe Sdn.Bhd.';
                MDRLineItem.CE_Cert_Number_OEMi_OBM__c= '- N/A -';
                MDRLineItem.Notify_Body_OEMi_OBM__c= '- N/A -';

                insert MDRLineItem;
                Delete MDRLineItem;
                
                
                //Opportunity createOpp = new Opportunity();
                
                
                //Apex Trigger addError Checking
                ChildRecord__c testResult = [SELECT Id, IsDeleted FROM ChildRecord__c WHERE Id =: MDRLineItem.Id];
                system.debug('testResult.IsDeleted:::'+testResult.IsDeleted);
                system.assertEquals(true, testResult.IsDeleted);
            }
            Test.stopTest();
            
        } catch(Exception e) {
            system.debug('error::'+e);
        }
        
    }
}