Achieving Zero Defect with Agile Methods BugDay Bangkok 2012 โดย Varokas Panusuwan (Agile66)

1. Achieving Zero Defect
with Agile Methods
Varokas Panusuwan (Agile66)
- Bug Day Bangkok 2012 -

2. Agenda
● Context
● TDD
● QA Role in Agile
● Continuous Delivery
● Q&A

3. About My Team

5. My Team
● 10 Devs (5+5)
● 2 Product Owner
● 3 QAs
● Agile !! -- 2 Years from 0
● Inherited Legacy code
● Web Application
● Release Weekly
● Zero Defect*
PMs Love Us !!
* in TDDed code

6. Zero Defect

7. Test Driven Development

8. Test Driven Development (TDD)
#1 #2
<Test 1>
<Test 2>
<Test 3>
<Test 1>
<Test 2>
<Test 3> Test Failed !!
Le Write Test
#3 #4
Writing Code
<Test 1> Like a Sir
<Test 2>
<Test 3>
[Code 1] Code
[Code 2] Always
[Code 3] Test Passed!! Tested
Le Write Code

9. TDD == Testable Specification

10. Story
TDD
Create Login
Page
(1) Email has testEmailFormat()
correct format
(2) Password testPasswordRequired()
required
...
Acceptance
Criteria
Le Spec Le Test
Automate
Tested
#2 fail.
Oh...
setup
wrong
B****
PLEASE !!
QA DEV

11. [Code 1]
[Code 2]
[Code 3]
Req? Code?
Interface
● Specific
● Measurable
● Actionable
T ● Realistic
EN
R EM ● Time-bound
UI
RE
Q ●
Test
https://github.com/varokas/tdd-examples/blob/master/src/test/java/com/huskycode/stack/StackImplTest.java

12. Bug
TDD
? ??
F***
YEAH!! Mismatch Not in Spec
Spec

13. TDD == Better Modular Design
== Easier to Test

14. QA... U MAD ??
public billing() {
date = new Date(); //Get Today
if(date == endOfMonth)
sendBillToCustomer();
}
QA

15. 1. Let todayService.getToday == 30
2. runTest --> billing(todayService)
3. SUCCESS !!
Le Test Code
MO K
CK EA
TW Le QA
Le Dev
public billing(dateService) {
date = dateService.getToday();
if(date == endOfMonth)
sendBillToCustomer();
}

16. QA Role in Agile Team?

17. Bug
???
Exploratory
Testing
Spec Not in Spec
Mismatch

18. Story (Spec) Writing
SPEC
PM #2 Conflict with ...
(1) HAPPY PATH
(2) HAPPY PATH
(3) SAD PATH
DEV (4) EDGE CASE
(5) EXCEPTION
What about ...
QA

19. QA Like a Sir
Agile All The Way
Quality
Up Front
1. PM & Dev & QA Write Story
2. QA Review Acceptance Criteria [ TESTs !!! ]
3. Dev implement Story
4. QA Exploratory Test
DONE !!!
Regression
Test

20. QA >> Testing

21. Continuous Delivery

22. "Responding to Change
over Following a Plan"
- Agile Manifesto #4 -
http://agilemanifesto.org/

23. Following Big Plan...
week 1 Bug in legacy
code found !! H
ANC
week 2 Need fix in 1 BR MER
GE
week
Order Management
ION
System ESS
R EGR G
TIN HOT
TES FIX
RELEASE SCHEDULED
[Release 1] PLANNING DOWNTIME
REPLAN !!!
User Management
System
LL
RE-ESTIMATE S TA H
TE NC
A
[Release 2] BR
Big Gigantic Module
System Thingie
..
..
..

24. Responding to Change Weekly
Releases
week 1 View All Orders
week 2
Add Order
Deliver
Value
week 3
Cancel Order Over
Time
P1 Bug ... Have
to fix in 1 week !!
PM
Fix Shuffle priorities
Bug like a sir
DEV QA
week 4
Cancel Order
week 5
Edit Order
...
...

25. One Thing At A Time

26. Work 1
Work 2
PM
Work 3
QAs
Devs

27. Work 1
Work 2
PM
Work 3
QAs
Devs

28. Code Review / Pair
Programming

29. "given enough eyeballs,
all bugs are shallow"
- Linus' Law -

30. Pair Programming == Real time code review
Does not have to be all the time !!

31. Better Quality
● Test Harder?
● Test More?
● Don't Change Anything?

32. Agile == Simplify
● No spec mismatch
● 100% code coverage
● Document always match code
● Automated regression test
● Less bug inducing activities/useless tasks,
More delivering good quality code.
● "Do the right thing, at the right time"

33. "The only way to go fast
is to go well."
Uncle Bob

34. Thank you !!
n s?
s tio
ue
Q
Agile66:
www.facebook.com/groups/agile66
Me:
www.facebook.com/varokas

35. Please:
Feel free to view and distribute
Use/Modify this slide only under permission
from the author

36. Additional Topics

37. More About Agile ??
Agile Thailand 2012
(17/06/2012)
http://agilethailand2k12.eventbrite.com/

38. TDD == 100% Coverage

39. Code 1
Test 1
Code 2
.....
Test 2
..... YU
(Le Wild Code appears) NO TEST?
....
....
Test 3
Code 3
Le Code

40. Incremental Design

44. Trunk development?

45. You Ain't Gonna Need It

46. TDD == Safety Net

47. Whole Team == reduced bug