1. By: Taylor Helsper

2.  Introduction  Test Driven Development  JUnit  Testing Private Methods  TDD Example  Conclusion

3.  What is this lecture? ◦ Part of a CSE 4000 Independent Study Course ◦ “Practical Issues in Software Engineering”  What’s the point? ◦ To provide practical information to students in Software Engineering topics Note: The products discussed in this presentation are examples used for teaching purposes and are not endorsements of the products.

4.  Introduction  Test Driven Development  JUnit  Testing Private Methods  TDD Example  Conclusion

5.  What is it? ◦ Development/Testing process where tests are generated before the development ◦ Development is completed based on the tests

6.  Why is it useful? ◦ Distinct Steps ◦ Good Metrics ◦ Ensures Completion Based on Requirements/Design

7.  Why is it useful? ◦ Only necessary features are implemented ◦ Short Development Lifecycle ◦ Easy to Accommodate Changes

8.  Steps ◦ Write tests based on design / requirements ◦ Write code ◦ Run tests ◦ Repeat until all tests pass

9. http://en.wikipedia.org/wiki/Test-driven_development

10.  Introduction  Test Driven Development  JUnit  Testing Private Methods  TDD Example  Conclusion

11.  What is it? ◦ JUnit is a testing framework for Java ◦ It allows programmers to write test cases for Java classes

12.  Why use it? ◦ Repeatability ◦ Metrics / Measurement ◦ Easy Integration

13.  A JUnit Test Case

14.  JUnit Before/ After

15.  Introduction  Test Driven Development  JUnit  Testing Private Methods  TDD Example  Conclusion

16.  Why? ◦ Better Tests ◦ Higher Probability Errors are Found ◦ Meet Regulations  Testing Standards  Code Coverage

17.  How? ◦ Use Reflection ◦ Java classes know info about themselves  Functions  Variables

18.  Java Example ◦ Get Private Access

19.  Java Example ◦ Test Private Method

20.  Introduction  Test Driven Development  JUnit  TDD Example  Conclusion

21.  Math Class for a Calculator Program  Steps ◦ Generate Tests ◦ Code ◦ Run Tests ◦ Repeat

22.  Test Driven Development is important to understand  TDD is useful in many circumstances  TDD ◦ Saves Money ◦ Is Agile ◦ Offers Good Metrics

23.  Junit - http://www.junit.org/http://www.junit.org/  Netbeans – http://netbeans.org/http://netbeans.org/  JUnit Examples - http://junit.sourceforge.net/doc/cookbook/cookbook.htm http://junit.sourceforge.net/doc/cookbook/cookbook.htm  MSU Classes and work experience  Stack Overflow for Reflection Code - http://stackoverflow.com/questions/34571/whats-the-best-way-of- unit-testing-private-methods http://stackoverflow.com/questions/34571/whats-the-best-way-of- unit-testing-private-methods  Real’s How To for Reflection Code - http://www.rgagnon.com/javadetails/java-0031.html http://www.rgagnon.com/javadetails/java-0031.html  “Subverting Java Access Protection for Unit Testing” by Ross Burton. 11/12/2003. onjava.com.onjava.com