Developers Border Line: Unit Testing

1. Developers Border Line:
Unit Testing
Muhammad Usman Shafqat
SQA Engineer
Confiz Solutions

2. What do you guys think about Unit Testing?

3. What Is Unit Testing?
 Testing
done by developers during and after
code construction.
 Could be of type:
1- White Box
2- Black Box

4. More Explanation:
 Unit testing is a development procedure where
programmers create tests as they develop software.
 The tests are simple short tests that test functionality of a
particular unit or module of their code, such as a
“class” or “function”.
 Using open source libraries like cunit, cppunit and nunit
(for C, C++ and C#) these tests can be automatically run
and any problems found quickly.
 As the tests are developed in parallel with the source
code, when the particular unit is completed, a successful
unit test demonstrates it's correctness.

5. Why Unit Test?
 Reveals bugs that may escape “black box”
testing
 Simplifies Integration
 Facilitates Change
 Documentation
 Encourages good design, such as separation
of interface from implementation

6. Take a Better Approach

7. Value of Unit Testing

8. The Why, The What, The How
It has to do with Quality!
 Your software has to meet customer
requirements
 functional and non-functional requirements
 How do you ensure that your software does
what it should?

9. The Why, The What, The How
It has to do with Safety!
 You often have to change your existing code
because of new
requirements, improvements, and bug fixes
 How do you ensure, that your changed
software still does what it did before?

10. The Why, The What, The How
It has to do with Sustainability!
 You still have to fix bugs
 How do you ensure, that a fixed bug never
shows up again?

11. The Why, The What, The How
You have to show that
 The product works as expected
 But also its individual parts, like
 services
 components
 classes
 methods

12. The Why, The What, The How
 You can do this manually
 Writing test specifications and protocols
 Or (much better) automated
 Let the system do it for you (at least part of it)

13. Best Practices:
Have a Process and Stick to It!
 Have a process
 Any process is better than none
 Make sure it is not “shelfware”
 ALL processes say you should unit test
 (they’re just not that specific about how)
 Developers should feel the process is
helping, not hindering them
 Managers should support the team and the
process

14. Best Practices:
Test Early and Test Often
 Consider writing the tests first (Test-Driven
Development)
 Start testing as soon as you start writing the
code (if not before)
 Make sure the tests are run frequently
 The earlier you know about a problem the
earlier you can fix it

15. Best Practices:
Refactor, Refactor, Refactor
 Avoid complexity
 Break large classes into smaller ones
 Break large methods into smaller ones
 Simplifying
the code makes it easier to
understand.

16. Best Practices:
Use “Extreme Feedback”
 Try to fix bugs as soon as they are identified
 If not possible, make a plan for when to fix
 “Don’t live with Broken Windows”
 If you can’t measure you can’t manage it
 If you can’t manage it, you can’t improve it

17. Web UI issue - screen 1
Issue: Menu’s are Not displayed in single line and Text is displayed out of
Banner.
Mockup Screen is at Next Slide…

18. Mockup - screen 1

19. Web UI issue - screen 2
Issue: Text missing from highlighted area.
Mockup Screen is at Next Slide…

20. Mockup - screen 2

21. Web UI issue – screen 3
Issue: Twitter icon and Footer links are Not displayed.
Mockup Screen is at Next Slide…

22. Mockup - screen 3

23. Cross Browser Issue:
TinyMCE Editor is Not displayed correctly in IE, working fine in others.

24. Mobile App UI issue 1
Issue:
First Alphabet is Not
capital in “Cancel”
button text.

25. Mobile App UI issue 2
Issue:
Text alignment is Not
correct with screen.

26. Mobile App UI issue 3
Issue:
Buttons are Not
Centrally aligned with
Screen.

27. Enhancement Unit Testing Issue
Enhancement: Display company introduction video at Job Board.
Issue: Video is displayed but other sections that were visible before this change are Not visible now.
See the Job Board screen before this change on Next Slide…

28. Job Board Screen before Change

29. Unit Testing Checklists
(Mobile App & Website)

30. Unit Testing Checklist - Mobile Application
(I-Phone/I-Pod Devices, Android Device, Windows Phone, Blackberry, Symbian OS)
Generic Testing: Yes No N/A
Does the page layout consistent from page to page according to the mockups/PSDs?
Functional Testing:
Does App Installation & Un-installation working correctly?
GUI & Usability Testing:
Navigation to Screens working fine?
Page Scrolling working fine?
Compliance/Compatibility Testing:
Verify the Behavior of Mobile App in Low resources (Memory/Space)?
Web Services/Backend Testing:
Connection with DB is made successfully through web service?
Data successfully Posted through web services?
See the full checklist available at below Engineering Wiki link:
https://sites.google.com/a/confiz.com/software-engineering/guides/unit-test-check-list?pli=1

31. Unit Testing Checklist - Website
Generic Testing: Yes No N/A
Does the page layout consistent from page to page according to the mockups/PSDs?
Functional Testing:
Check that all the links under Main Menu’s are working properly?
Check that all the Header or Footer links are working properly?
GUI & Usability Testing:
Does all text properly aligned?
Does all graphics properly aligned?
Compliance/Compatibility Testing:
Does all supported browsers been tested?
Does the HTML version being used compatible with appropriate browser versions?
Web Services/Backend Testing:
Connection with DB is made successfully through web service?
See the full checklist available at below Engineering Wiki link:
https://sites.google.com/a/confiz.com/software-engineering/guides/unit-test-check-list?pli=1

32. References:
 http://rollerjm.free.fr/pro/junit/3.htm
 http://en.wikipedia.org/wiki/Unit_testing
 http://www.developertesting.com/
 http://cplus.about.com/od/glossar1/g/unittesting.htm
 http://www.scribd.com/doc/84614135/05-unittesting
 http://ebookbrowse.com/unit-testing-nz-jug-presentation-pdf-d274895477