Path to code Episode 5 - Writing unit tests in Salesforce

1. Path to Code
Begin Your Salesforce Coding Adventure

2. Episode 5
Writing Unit Tests in Apex

3. Enterprise Solutions Architect
Follow me @JigarShah189
Jigar Shah

4. Agenda
• Why write Unit Tests in Apex?
• Understanding Test Code Coverage
• Blueprint of a Test Class
• Executing Unit Tests
• Best Practices for Unit Testing
• Trailhead Modules
• Q&A

5. Some Housekeeping Rules…
• Mute your mic
• Keep adding questions in Zoom Q&A Window
• No questions are silly!
• Questions will be answered in the last 15 mins of this session

6. Why write Apex Unit Tests?
Validate desired behavior
Reliable & consistent
Reduce the bug fix cost
Perform Bulk tests
Introduce changes effectively

7. Understanding Test Code Coverage
“Unit tests must cover minimum 75%
of Apex code on your org & all tests
must complete successfully”

8. What to Test?
Single Action
Bulk Actions ( >200 records)
Positive Behavior (Expected Behavior)
Negative Behavior (Unexpected Behavior)
Restricted User Access

9. Anatomy of a Test Class
1
2
3
4

10. Demo 1

11. Executing Unit Tests
• Run executions
o All unit tests
o Some or all methods of specific class
o Some or all methods of a set of classes
o Predefined suite of classes – Test Suite
• How to run?
o Salesforce user interface
o Force.com IDE
o Lightning Platform Dev Console
o API

12. Demo 2

13. Becoming a Pro at Unit Tests
• Accessing Private Data Members in a Test Class
• @Testvisible
• Running Test Code within Limits
• Test.startTest()
• Test.stopTest()
• Creating Test Data without Code
• Test.loadData()
• Impersonating Users in Unit Tests
• System.runAs()

14. Best Practices for Testing
 Test for Use case & not Code Coverage
 Check for all scenarios – valid, invalid, bulk and restricted User
 Use System.assert to prove the code behaves properly
 Create your Test Data
 Create test data before Test.startTest
 State the assumptions the tester made about the data, the
expected outcome etc. in code comments
 Never test your entire application in a single test.
•

15. Resources
 Testing Apex
 Running Unit Test Methods
 Building a Mock Framework with Stub API

16. Trailhead Modules
Apex Testing Unit Testing on Lightning Platform

17. Q & A

18. Thank You

19. Subscribe