Unit Testing Java using Groovy and Mock Objects

1. Unit Testing Java using Groovy and Mock Objects Walker Hale Human Genome Sequencing Center Baylor College of Medicine

2. The Plan Groovy makes testing Java better. Motivation Introduce Groovy Apply Groovy to Testing Mock Objects TestNG Grand Demo

3. The Setting Java shop Subversion � for version control Maven 2 � for most builds Groovy � for various tasks Many apps running against a common database and set of libraries

4. An Ideal Deliverable in Our Shop Code checked into version control Builds with maven 2 Passes all unit tests

5. The Plot The Motivation More unit testing! The Insight Small changes in the difficulty or unpleasantness of a task produce disproportionately large changes in how much that task is performed. Enter Groovy

6. Groovy in 15 Minutes Almost all Java code is Groovy code no inner classes http://groovy.codehaus.org/Differences+from+Java Groovy adds: Fun syntactic sugar Lazy method dispatch Methods to the standard Java library classes Closures Groovy-specific classes Interactive shell

7. Syntax Sugar

8. Syntax Sugar

9. Lazy Dispatch & Expanding JDK

10. Closures 1

11. Closures 2

12. Closures 3

13. Testing in Groovy Compiled (not limited) with JUnit 3.8.2 Adds GroovyTestCase New assertions, such as shouldFail GroovyTestSuite Simple command line operation URLs http://groovy.codehaus.org/Testing+Guide http://groovy.codehaus.org/Unit+Testing

14. Demo Time!

15. Resources http://groovy.codehaus.org/ Documentation Differences+from+Java Testing+Guide http://searchgroovy.org/