Hi All,

Please see below Task Trigger (1st) and Test Class (2nd):
 

Trigger EPS_LeadStatusOppStageToTask on Task (before insert, before update) {
    
    String lead_prefix = Schema.SObjectType.Lead.getKeyPrefix();
    String opportunity_prefix = Schema.SObjectType.Opportunity.getKeyPrefix();
    
    Map<Id, List<Task>> whoWhatIds = new Map<Id, List<Task>>{};

    For (Task t : trigger.new) {
        
        If (Trigger.isUpdate) {
        
        Task oldTask=Trigger.oldMap.get(t.Id);
    
        Boolean oldTaskIsCompleted=oldTask.Status.equals('Completed');
        Boolean newTaskIsCompleted=t.Status.equals('Completed');
        
        If (t.WhatId == null && t.WhoId != null && ((String)t.WhoId).startsWith(lead_prefix) && (!oldTaskIsCompleted && newTaskIsCompleted)) {
            List<Task> tasks = whoWhatIds.get(t.WhoId);
            If (tasks == null) {
                tasks = new List<Task>{};
                whoWhatIds.put(t.WhoId, tasks);
                tasks.add(t);
            }
        } Else If (t.WhatId != null && ((String)t.WhatId).startsWith(opportunity_prefix) && (!oldTaskIsCompleted && newTaskIsCompleted)) {
            List<Task> tasks1 = whoWhatIds.get(t.WhatId);
            If (tasks1 == null) {
                tasks1 = new List<Task>{};
                whoWhatIds.put(t.WhatId, tasks1);
                tasks1.add(t);
            }
        }
        }
        
        If(Trigger.isInsert) {
        
        If (t.WhatId == null && t.WhoId != null && ((String)t.WhoId).startsWith(lead_prefix) && t.Status == 'Completed') {
            List<Task> tasks = whoWhatIds.get(t.WhoId);
            If (tasks == null) {
                tasks = new List<Task>{};
                whoWhatIds.put(t.WhoId, tasks);
                tasks.add(t);
            }
        } Else If (t.WhatId != null && ((String)t.WhatId).startsWith(opportunity_prefix) && t.Status == 'Completed') {
            List<Task> tasks1 = whoWhatIds.get(t.WhatId);
            If (tasks1 == null) {
                tasks1 = new List<Task>{};
                whoWhatIds.put(t.WhatId, tasks1);
                tasks1.add(t);
            }
        }
        }
    }

    For (Lead ld : [Select Id, Name, Status from lead where Id in :whoWhatIds.keySet()]) {
        For(Task t2 : whoWhatIds.get(ld.id)) {
            t2.Lead_Opp_Status_Stage__c = ld.Status;
        }
    }

    For(Opportunity opp : [Select Id, Name, StageName from Opportunity where Id in :whoWhatIds.keySet()]) {
        For(Task t3 : whoWhatIds.get(opp.id)) {
            t3.Lead_Opp_Status_Stage__c = opp.StageName;
        }
    }
}

 

@isTest
Public class EPS_Test_LeadStatusOppStageToTask {

    private static testMethod void myUnitTest() {
        
        Lead newLead = new Lead (
                       LastName = 'Test',
                       Company = 'Test Company',
                       Phone = '3759275838',
                       Industry = 'Arts',
                       Status = 'New'
                       );
        insert newLead;
        
        Account newAcct = new Account (
                          Name = 'Test Company'
                          );
        insert newAcct;
        
        Opportunity newOpp = new Opportunity (
                             Name = 'Test Company',
                             AccountId = newAcct.Id,
                             CloseDate = System.today(),
                             StageName = 'Demo Held'
                             );
        insert newOpp;
                             
        Task newTask = new Task (
                       WhatId = newOpp.Id,
                       Type = 'Call',
                       Status = 'Completed',
                       ActivityDate = date.today()
                       );
                       
        Task newTask1 = new Task (
                        WhoId = newLead.Id,
                        Type = 'Call',
                        Status = 'Completed',
                        ActivityDate = date.today()
                        );
                        
        Task newTask2 = new Task (
                        WhatId = newOpp.Id,
                        Type = 'Call',
                        Status = 'Not Started',
                        ActivityDate = date.today().addDays(5)
                        );
                       
        Task newTask3 = new Task (
                        WhoId = newLead.Id,
                        Type = 'Call',
                        Status = 'Not Started',
                        ActivityDate = date.today().addDays(5)
                        );
                       
        Test.startTest();
        
            insert newTask;
            System.assert(newTask.Lead_Opp_Status_Stage__c == 'New');
            
            insert newTask1;
            System.assert(newTask1.Lead_Opp_Status_Stage__c == 'Demo Held');
            
            insert newTask2;
            newTask2.Status = 'Completed';
            System.assert(newTask2.Lead_Opp_Status_Stage__c == 'New');
            
            insert newTask3;
            newTask3.Status = 'Completed';
            System.assert(newTask3.Lead_Opp_Status_Stage__c == 'Demo Held');
            
        Test.stopTest();
    }
}

The trigger works well enough for my purposes, but I cannot seem to get the code coverage above 56%. Also, when I run the Test, my Method does not Pass!

My question is this: Are there any resources available to help one identify where the test class is lacking in coverage on a particular trigger? ie Where in my trigger is the code not covered?

In addition, are there any particular recommendations for me here to improve coverage? I am a novice Apex developer so this is still a learning experience for me. If you would like to take the time on recommendations for me to improve my code as well, that would be appreciated; the trigger does in fact work, but I am sure there are more succinct ways to accomplish the same thing.

Thanks!
Elliot