testing the legacy: making existing applications testable without epic efforts
TRANSCRIPT
testing theLegacy
making existing applications testablewithout epic efforts
Alex [email protected]
@alexanderleonov
Why is it not done yet?• no people• no time• no money
Why is it not done yet?• no people• no time• no money
doesn’t hurt enough
How to eat an elephant?• piece• by• piece
How to make it testable?• bug• by• bug
if they say it’s Impossible
remember that it’simpossible for them
you need to get
The Commitment
Automated Tests
Old Application New Application
Old Application
Old Code
Automated Tests
Bubble WrapOld Application
Old CodeLogic
Automated Tests
Bubble WrapOld Application
Old CodeProxy
New Application
Services
Automated Tests
Old Application
Old Interfaces
New ApplicationInterfaces
Services
Automated Tests
Old Application New Application
Automated Tests
New Application
The Easy Wayor
The Good Way
The Easy Way• make code with bugfix testable• write down gherkins• hope someone updates them
The Good Way• make bugfix testable• make “feature” testable• make executable gherkins• add this to the Definition of Done
Things to Remember• view features as services• stateless is better than stateful• don’t test the whole all the time• don’t let it slip
Recap• get commitment• don’t compromise on quality• automate everything you touch• bubble-wrap old stuff• start small and grow over time
