This document discusses test encapsulation and describes features of the Arjuna test engine. It begins with a story told from the perspective of an automated test describing its creation and identity. It then discusses key concepts of Arjuna including that it is written from the test's perspective, has layers of test objects, and supports test steps as a built-in feature. In closing, it thanks the listener and provides information about the author and links to learn more.

1. Test Encapsulation
Let Automated Tests Think for Themselves
Rahul Verma
Testing Researcher. Teacher. Technologist.
www.rahulverma.net

2. Hello
Test Automators,
I am your creation.
This is my story…

3. I was an
Idea in your
mind…
And you coded
me…

4. You created
many of us…

5. We were different.
We were beautiful.

6. We had identities.

7. We still are…
Different
Beautiful
We still have…
Identities

8. BUT
Not in your opinion any
more…

9. This is who we are to
you.
All Alike.
Ready for your
command.

10. Categorized.
Caged.
Our only purpose.
Lay ‘green’ eggs.
(Ever thought about
me?)

11. Wasn’t I your
primary love?
Why do you
think I am
dumb?

12. Wow!
That was
deep! I’m the
water in the
water.

13. I often
wonder…

14. Why Do You
Ask Me If I
am a Cat?
Just Ask About
Me.
I would tell you
honestly.
Better yet.
Let me handle
myself.

15. Who
Am
I?
What
Do
I Do?
What Drives
Me?

16. Who are my
parents?
What is my
type?
Should I
Surrender?

17. Which
universe I
am in?
What are
my steps?
Do I depend on
others?
How are they doing?

18. Am I Buggy?
What are
my
properties?
Am I a
Dummy?

19. Let Me
Show You
What I Can
Do…
…If You Just
Let Me Be.

20. Over to
Rahul

21. Now that you have heard story
of an Automated test…
Let’s look at some features of Arjuna, a free, open
sourced, pure Python test engine that I’ve
developed.
It’s written from the test’s perspective. In
technical terms, I call the concept under discussion
as Test Encapsulation.
I published the paper a decade ago. I’ve spent
many years developing various engines in Java/
Python to get it into a shape.
Arjuna is my most complete implementation of
the concept so far.
www.testmile.com/arjuna

22. Meaning of the Word ‘Test Object’
• Arjuna has 8 layers of Test Objects.
• Keeping time in mind, I’d focus just on test function.

23. In

26. A Shy Test

27. An Expressive Test

29. Who Am I

30. Who Am I

32. Should I Surrender?

34. Do What You Want To Do
With All Info a Test Can Access, imagine the flexibility
The test function is a template which can create tests in any
number of surrounding universes and behave differently
Support for Test Steps is a built-in feature in Arjuna unlike
other engines
The my object is an extremely powerful concept readily
available to all Arjuna tests.
Keeping time in mind, I haven’t touched on test fixtures,
creation of modules, groups, stages, sessions and so on.

36. Pythonic Simple Assertions

37. Arjuna Simple Assertions

38. Arjuna Fluent Assertions

39. Arjuna Soft Assertions

40. Arjuna Lazy Assertions

42. Test Object Reports Itself

44. Thanks for Listening.
Just forgot to tell you that I am…
Founder of Test Mile
CTO at Verity
Community Connect at STeP-IN Forum
Let’s connect:
https://www.linkedin.com/in/rahul-verma-india/
https://twitter.com/rahul_verma
www.rahulverma.net
www.testmile.com/arjuna

45. Picuture Credits for Free Pics:
https://en.wikipedia.org/wiki/Brahman#/media/File:Wassertropfen.jpg
: Picture By Sven Hoppe - www.camera-colonia.de, CC BY-SA 3.0,
https://commons.wikimedia.org/w/index.php?curid=287934
https://www.kisspng.com/png-donkey-12203/download-png.html
http://agritech.tnau.ac.in/animal_husbandry/ani_chik_poultry%20rearing.html