Presentation about TDD and how it helps developer to build solutions with higher quality

1. CODE QUALITY
AND
TESTABILITY
WITH TDD

2. TDD - A
SMALL
BACKGROU
ND
 It was created rediscovered by Kent
Beck in 2003, also the creator of
Extreme Programming
 It was one of the first programming
techniques introduced to XP
 Values of XP:
 Simplicity
 Communication
 Feedback
 Respect
 Courage

4. THREE
RULES OF
TDD
You are not allowed to write any
production code unless it is to
make a failing unit test pass.
You are not allowed to write any
more of a unit test than is
sufficient to fail; and compilation
failures are failures.
You are not allowed to write any
more production code than is
sufficient to pass the one failing
unit test.

5. HOW CAN TDD
HELP TO
IMPROVE OUR
CODE?

6. TESTS
WRITTEN
UPFRONT
Better planned solution No more code than
actually needed
Less code complexity Promotes SE principles
such as YAGNI, KISS and
SOLID

7.  Every TDD cycle includes refactoring
 Safety net for code refactoring
 Fast feedback

8. HOW CAN TDD
HELP TO
IMPROVE
TESTABILITY?

10. UNIT TESTS
SHOULD…
Test behaviour, not methods
Be Small and fast
Have good naming
Be well grained
Predictable

12. Every single method and module in the code base is
testable by default
Tests become granular and easy to read
Each test fail for one reason and one reason

16. TDD IS
ABOUT
PROBLEM
SOLVING
"Problem solving is the process of
breaking problems down into smaller and
more manageable parts. As the large
problem is broken down into smaller
parts, each part becomes more specific.
These individual solutions to smaller
problems are then combined to solve the
bigger problem. Problem solving is also
referred to as analysing the problem to be
solved."

17. TDD
IMPROVES
THE
PRODUCT
QUALITY
Tests are
present since
the beginning
Test are driven
by requirements
Test suite
becomes a living
documentation