Hur kommer det sig att vissa problem »bara» uppstår i produktion? Är det slarviga utvecklare eller lata testare som är roten till det onda? Så kan det vara men vi tror inte det. Istället anser vi att det är ett generellt feltänk kring hur testare och utvecklare arbetar som är problemet. I den här sessionen kommer vi därför att utmana den klassiska modellen och visa hur vi anser testare och utvecklare bör samarbeta för att bygga högkvalitativ mjukvara. Talare: Daniel Deogun & Bobby Sanghera

1. 1 + 1 = 1
Test + Development = The Omegapoint Way
Bobby Sanghera & Daniel Deogun
Twitter: @DanielDeogun
LinkedIn: linkedin.com/in/bobbysinghsanghera

2. About Us…
Daniel Deogun Bobby Sanghera
Omegapoint
Stockholm - Gothenburg - Malmoe - Umea - New York

3. Equity Fund Account
Case
• A bank offers its customers the service of investing in stock through equity
accounts
• Each account may target specific types of stock, e.g. only fair trade
companies in Africa
• An account may only include stock satisfying the account limitations
• A customer may have multiple accounts
• Each account may have different risks
• Assignment: Write an application service allowing customers to trade stocks
[1] http://upload.wikimedia.org/wikipedia/commons/4/4c/Emblem-money.png
By Spider death (Own work) [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
[1]

4. Equity Fund Account
Case
• Test data
• Account 1 may only include stock A, B, C, D, E
• Account 2 may only include stock D, F, G
• Account 3 may only include stock A, C, D, E
[1] http://upload.wikimedia.org/wikipedia/commons/4/4c/Emblem-money.png
By Spider death (Own work) [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
[1]

5. Build Pipeline
Compile Unit tests
Component
tests
Manual
System
tests
Compile Unit tests
Component
tests
Manual
System
tests
Build Failed!

6. Test
Interpretation
• Pre-condition
Select customer X with equity account 1 & 3
Select account 3
• Testcase
Step 1: Select stock A
Step 2: Choose TRADE 50%
Step 3: Confirm
• Expected Result
50% of the value of stock A in account 3 is traded
Account 1 is untouched.

7. Developer
Interpretation
• Accounts
Each account is a portfolio of risk
Each stock should be distributed among the accounts according to the risk
chosen by the customer
• Assumptions
Customer X has 100 stock of type A
30% of stock A is placed in account 1
70% of stock A is placed in account 3
• Test
Execute Trade 50% of stock A => 50 stock A should be traded
Expected Result 30% of stock A resides in account 1 => 15 stock A
Expected Result 70% of stock A resides in account 3 => 35 stock A

8. Analysis
https://flic.kr/p/5aghr9

9. Equity Fund Account
Case
• A bank offers its customers the service of investing in stock through equity
accounts
• Each account may target specific types of stock, e.g. only fair trade
companies in Africa
• An account may only include stock satisfying the account limitations
• A customer may have multiple accounts
• Each account may have different risks
• Assignment: Write an application service allowing customers to trade stocks
[1] http://upload.wikimedia.org/wikipedia/commons/4/4c/Emblem-money.png
By Spider death (Own work) [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
[1]

10. Analysis
No common understanding
Focus on independence
Ambiguous requirements
Parallel work to ensure time efficiency

11. Stop Fumbling in the
Dark…
https://flic.kr/p/9J6ZYG

12. The old problem we
always try to solve
Cost for
solving bugs
Time elapsed
HO
W
?

13. Our savior?
http://martinfowler.com/books/continuousDelivery.html

14. bugs are still expensive
Cost for
solving bugs
Time elapsed

15. apple inc. stock chart
www.nasdaq.com

16. observation -
collaboration
DDD modeling
Pair programming
Pen test collaboration

17. The Omegapoint Way
https://flic.kr/p/68hEqK

18. Biggest Bang for the
Buck
[2]
[2] https://www.flickr.com/photos/teddylambec/3581134792/
Time
Cost
Quality

19. Different Roles
• Developers still need to develop code
• Testers still need to develop tests
• However, we both want to develop software that is quality
assured!

20. Strategic Development
Continuously analyze risks
Tactical testing
See the whole map
Logic review

21. Bugs
[3] https://www.flickr.com/photos/joealterio/3154810970/

22. our new savior!
Cost for
solving bugs
Time elapsed
+

23. Why isn’t the Omegapoint
way the standard way?
Culture
Not objective
Overall cost

24. overall effects?
Team constellations
Productivity
Quality
Overall cost

25. Q & A
https://flic.kr/p/9ksxQa