TDD is the elengant way of designing software. People scares from it so much, because software design is hard and it requires discipline. In this talk, I tried to describe what TDD is from software design perspective.
LEMi ORHAN ERGiN
agile software craftsman @ acm
/lemiorhan
lemiorhanergin.com
@lemiorhan
managing partner at acm
developing since 2001
worked at Sony and eBay/GittiGidiyor
consultant, architect, trainer, developer
founder of Software Craftsmanship Turkey
ex product owner of Agile Turkey Summit
meetup.scturkey.org
summit.agileturkey.org
Jack W. Reeves
The C++ JournalVol. 2, No. 2. 1992
http://user.it.uu.se/~carle/softcraft/notes/Reeve_SourceCodeIsTheDesign.pdf
What is So!ware Design?
Source code is the real
so!ware design
Designing so!ware is an exercise in managing complexity
Jack W. Reeves
What is Software Design? The C++ JournalVol. 2, No. 2. 1992
http://user.it.uu.se/~carle/softcraft/notes/Reeve_SourceCodeIsTheDesign.pdf
The so!ware design is
not complete until it has
been coded and tested
Testing is part of the process of refining the design
Jack W. Reeves
What is Software Design? The C++ JournalVol. 2, No. 2. 1992
http://user.it.uu.se/~carle/softcraft/notes/Reeve_SourceCodeIsTheDesign.pdf
The very first value of
so!ware is…
Robert C. Martin
Author of Clean Code and Clean Coder
Owner of cleancoders.com training site
The very first value of
so!ware is to tolerate and
facilitate on-going changes
Robert C. Martin
Author of Clean Code and Clean Coder
Owner of cleancoders.com training site
Each city has to be renewed in order to
meet the needs of its populace.
So!ware-intensive systems are like that.
Grady Booch
Developed UML
Wrote foreword to
“Design Patterns” and
“Technical Debt” books
Istanbul, TurkeyCredit: European Space Imaging
Everything is part of the
design process
Jack W. Reeves
What is Software Design? The C++ JournalVol. 2, No. 2. 1992
http://user.it.uu.se/~carle/softcraft/notes/Reeve_SourceCodeIsTheDesign.pdf
red super giant
huge classes, tons of workarounds,
no new features, maintenance mode rules,
basic implementations take weeks,
no one knows how overall system works,
rollbacks a!er deployments,
architect saves the company
Two elements are loosely
coupled if they are not
shown in the same diff
Kent Beck
The creator of extreme programming
One of the signatories of the Agile Manifesto
Pioneered software design patterns and TDD
COHESION
Do you search a lot where to change?
It shows how easy to find the places we need to change
How many files at any
one time is still open for
edit shows the level of
cohesion
Nat Pryce
Co-Author of Growing Object-Oriented Software Guided by Tests
Early adopter of XP