1. Unit test your *LocalServiceImpl
classes
Professional Service Manager Brazil
Thiago Moreira

2. Content
●
Why test LocalServiceImpl classes?
●
Past attempts to test
●
Easy things to test
●
What is EasyMock and PowerMock?
●
Complex things to test
●
Mocking static methods

3. Why unit test *LocalServiceImpl classes?

4. Past attempts to test *LSImpl
We didn't automate tests at all

5. Past attempts to test *LSImpl
Integrated tests

6. Past attempts to test *LSImpl
●
Implemented all interfaces that were dependencies in a
given LocalServiceImpl
●
MockUserLocalService, MockPortal, MockIndexerRegistry
●
Created a project called portal-test

7. Sample application
●
Project based on Maven
●
One entity called BeerDrinker (name and alcoholLevel fields)
●
Workflow enabled
●
Class in test BeerDrinkerLocalServiceImpl referenced as just
impl.
●
Test class BeerDrinkerLocalServiceImplTest
●
Code available in
github.com/tmoreira2020/liferay-service-builder-unit-testable

8. Easy things to test first

9. Easy things to test first

10. Easy things to test first

11. Refactoring

12. Next step
●
Increment complexity
●
EasyMock/PowerMock

13. What is EasyMock?
“EasyMock provides Mock Objects for interfaces (and objects
through the class extension) by generating them on the fly
using Java's proxy mechanism. Due to EasyMock's unique
style of recording expectations, most refactorings will not
affect the Mock Objects. So EasyMock is a perfect fit for Test-
Driven Development.”

14. What is PowerMock?
“PowerMock is a framework that extend other mock libraries
such as EasyMock with more powerful capabilities.
PowerMock uses a custom classloader and bytecode
manipulation to enable mocking of static methods,
constructors, final classes and methods, private methods,
removal of static initializers and more.”

15. What is EasyMock/PowerMock?
My opinion: EasyMock and PowerMock are the swiss army
knife for unit testing.

16. What is EasyMock/PowerMock?
Set
expectations
Create Mock VerifyTest
Set ready
(replay)

17. Complex things to test

18. Complex things to test

19. CounterLocalService

20. Create the mock
CounterLocalService counterLocalService =
createNiceMock(CounterLocalService.class);

21. Set expectations
String className = BeerDrinker.class.getName();
expect(counterLocalService.increment(className)).andRe
turn(beerDrinkerId);

22. Switch to replay mode
replay(counterLocalService);

23. Set the mock object in impl class
impl.setCounterLocalService(counterLocalService);

24. Verify
verify(counterLocalService);

25. Mocking static methods

26. Enabling workflow

27. Adding annotations

28. Testing workflow

29. Challenges
●
Culture
●
Lack of documentation/articles
●
Verbosity

30. thiago.moreira@liferay.com
@tmoreira2020
thiago.moreira@liferay.com
@tmoreira2020
Thank you