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[walters954]

Hi Irene! 👋

Great work on this Testing & Debugging module! You clearly put serious thought into both debugging the LeadTriggerHandler class and writing a comprehensive test suite. The fact that you identified multiple intentional bugs and fixed them — and wrote both positive and negative test scenarios — is impressive work.

What You Did Well ✅

Strong Debugging Skills

• You correctly identified and fixed the null-pointer issue in handleTitleNormalization by pre-filtering leads with non-null titles before the loop — great defensive coding!
• In handleAutoLeadScoring, you caught two real bugs: initializing score to 10 instead of 0 (which would allow scores to exceed 18), and using = assignment instead of += (which meant only the last condition counted). Both fixes are exactly right.
• In handleLeadAutoConvert, you identified the recursion risk and correctly added isNewLead/hasEmailChanged guards, along with the IsConverted check to prevent re-processing.

Thorough Test Coverage

• You wrote both positive and negative test cases for handleTitleNormalization and handleAutoLeadScoring — this is exactly the right approach.
• Your handleLeadAutoConvertOneMatchUnitTest and handleLeadAutoConvertTwoMatcheshUnitTest tests cover the two critical scenarios well.
• You're using Assert.areEqual with descriptive messages, which makes test failures much easier to diagnose.

Proper @isTest Annotation

• The test class is correctly annotated with @isTest, and each test method has @isTest as well.

Proper Trigger Structure

• The LeadTrigger correctly separates before/after logic and passes Trigger.oldMap to handleLeadAutoConvert — a clean, well-structured trigger.

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Areas for Improvement 🚀

1. Use Test.startTest() / Test.stopTest() (Currently Commented Out)

I noticed Test.startTest() and Test.stopTest() are commented out in most of your tests. These are important for a few reasons:

• They reset governor limits for the code under test, giving you a fresh set of DML/query limits.
• They ensure async processes (like future methods, queueable jobs) complete before your assertions.
• They make it clear to other developers exactly which code is being tested.

For example, in handleTitleNormalizationCorrectionUnitTest:

// Recommended pattern:
insert leads;

Test.startTest();
LeadTriggerHandler.handleTitleNormalization(leads);
Test.stopTest();

// Then assert...

2. Submission Format — Use .cls Files Instead of a Single Text File

Your code was submitted in a single week11 file rather than as proper Apex .cls files in the force-app/main/default/classes/ directory. For real-world Salesforce development and for your future modules, always structure your code as individual files:

• force-app/main/default/classes/LeadTriggerHandler.cls
• force-app/main/default/classes/LeadTriggerHandlerTest.cls
• force-app/main/default/triggers/LeadTrigger.trigger

This ensures Salesforce CLI (sf deploy) and version control tooling work correctly.

3. Minor: Assertion Argument Order

In Apex, Assert.areEqual(expected, actual, message) — the expected value comes first. In a couple of your lead auto-convert tests the arguments appear reversed (e.g., Assert.areEqual(nonConvertedLead.IsConverted, false, ...)). While this works, reversing them means error messages say "Expected: false, Actual: false" which is confusing. Swap to Assert.areEqual(false, nonConvertedLead.IsConverted, ...) for clarity.

4. Consider Test Data Isolation with @testSetup

Right now each test method inserts its own data. As test suites grow, this can get repetitive and slow. Consider using a @testSetup method to create shared test data that is rolled back after the class runs:

@testSetup
static void setupData() {
    // Insert shared leads, contacts, accounts here
}

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Your Next Challenge 🎯

You did a solid job with both positive and negative test paths. For your next step, try thinking about edge cases:

• What happens if handleTitleNormalization receives an empty list? Does it still work gracefully?
• What if a lead has a title of "vp manager" — which normalization wins? Write a test that proves your understanding of the behavior.
• What if two leads in the same batch have the same email as two different contacts? Add a test to prove handleLeadAutoConvert handles that correctly.

Thinking through edge cases like these is what separates good developers from great ones — keep it up!

• Wally