1. Mockito
JUG Latvia
Denis Udod

2. Mochito vs Mockito
Mochito Recipe:
1/12 liter Dark Rum
3 cl Lemon Juice
1/2 handful Mint
1/12 liter Club Soda
8 drops Angostura Bitters

3. Mochito vs Mockito
Mochito Recipe:
1/12 liter Dark Rum
3 cl Lemon Juice
1/2 handful Mint
1/12 liter Club Soda
8 drops Angostura Bitters
Mockito Recipe:
Java
Unit testing
Mock object

4. Mochito vs. Mockito
Mochito Recipe:
1/12 liter Dark Rum
3 cl Lemon Juice
1/2 handful Mint
1/12 liter Club Soda
8 drops Angostura Bitters
Mockito Recipe:
Java
Unit testing
Mock object
What is the difference?

5. Mockito: Why drink it?
Q: What is unit testing?
Q: What is a mock-objects?
Q: Why do we mock-objects?

6. Unit testing - What's the point?
Write simple test for each class method.

7. Unit testing - What's the point?
Write simple test for each class method.

8. Unit testing - What's the point?
Write simple test for each class method.

9. Unit testing - What's the point?
Write simple test for each class method.
• simple
• fast
• independent from "any" (database, network, filesystem)

10. Mock object - What's the point?
Simulate the behavior of complex, real(non-mock) objects.
• Useful when a real object is impractical or impossible to
incorporate into a unit test.

11. Mock object - What's the point?
Example - service object supplies non-deterministic results:

12. Mock object - What's the point?
Example - service object supplies non-deterministic results:

13. Mockito: Why drink it?
• Mockito is a mocking framework that tastes really well.
• It lets you write beautiful tests with clean & simple API.
• Mockito doesn't give you hangover.

14. Mockito: Why drink it?
Syntax
• Let’s keep it simple
• No Strings for methods.
• No anonymous inner classes.
• Painless refactoring. Renaming a method should not break
my tests.

15. Mockito: How to drink it?
1. Download from http://mockito.org
2. Add to project.
3. And have fun

16. Mockito: How to drink it?
Create mock object:

17. Mockito: How to drink it?
Create mock object:

18. Mockito: How to drink it?
Create mock object:

19. Mockito: How to drink it?
How about returned values?

20. Mockito: How to drink it?
How about returned values?

21. Mockito: How to drink it?
Check method invocations

22. Mockito: How to drink it?
Check method invocations

23. Mockito: How to drink it?
Check method invocations

24. Mockito: How to drink it?
Check method invocations

25. Mockito: How to drink it?
Check method invocations

26. Mockito: How to drink it?
Spying on real object:

27. Mockito: Hangover?
Limitation:
• needs java 1.5+
• Cannot mock final class
• Cannot mock static, final methods
• Cannot mock equals(),hashCode() metods
• Cannot mock private metods
• Cannot verify toString()

28. Mockito
Who is your bartender?
Mockito is served to you by Szczepan Faber and friends.
www.mockito.org