Ho to use Groovy and Spock framework for testing Java projects. Examples of using Storm testing facility.

1. TESTING STORM COMPONENTS
WITH GROOVY AND SPOCK

2. About Me
Architect @WebMD
Java Developer
Big Data and NoSQL enthusiast
NYC Storm meetup organizer
@edvorkin

3. "It works on my
machine"
Testing is annoying to the
typical programmer.
Programmers are driven to
create things, build products,
add features, and make
things work.
Testing is just the opposite.
It's about finding
weaknesses, exploiting edge
cases and making it breaks.

4. "It works on my
machine"
How to make testing Java
applications easy and fast?

5. Groovy - more productive
Java
Compiles to byte code
Easy to pick up by Java
developers
Reuse of Java semantics
and API

6. Concise syntax

7. Concise syntax

8. Differences from Java
Optional typing
Optional Exception handling
Optional parentheses
meta programming

9. Lambdas -> Closures
• Closures are blocks of code that can be treated as first-class
objects: passed around as references, stored, executed at
arbitrary times, and so on.

10. Groovy Collections
A lot of syntax sugar and convenience methods on collections

11. JsonSlupper and XmlSlupper
Builders - Xml, Json, HTTP

12. Easy to work with SQL

13. IDE Support

14. How to get started?

15. How to get started?
Write tests!
Not a production code,
easy to get approval.

16. WHICH TESTING FRAMEWORK CAN I USE WITH GROOVY?
SPOCK - BEHAVIOR-DRIVEN TESTING FRAMEWORK

17. Spock Testing
Framework
Expressive testing language
Easy to Learn
Reduce the line of test code
Leverage Groovy
Productivity
Structural blocks - BDD style -context, stimulus,
expectation

18. BDD Style

19. BDD Style

20. Mock and Interaction
verification

21. Stubbing
Stubbing is the act of making collaborators
respond to method calls in a certain way.

22. Testing Storm
components

23. Testing Storm
components

24. Bolt under the test

25. Demo

26. Test Code

27. Test Code

28. Some ideas
Treat Storm components as regular functions
Use backtype.storm.Testing
Use Spock Mocks, Stubs and Interactions
https://github.com/xumingming/storm-lib/blob/master/sr

29. Resources

30. Resources
http://docs.spockframework.org/en/latest/
http://groovy.codehaus.org/
http://vimeo.com/43808772 - Venkat
Subramaniam - Caring about Code Quality
Storm Real-time Processing Cookbook by Quinton
Anderson

31. THANKS.