Test Driven Development

Question 1

Describe testing

Answer 1

Executing a program with the intention of finding errors in the code

Question 2

State the steps in the traditional waterfall model

Answer 2

Analysis
Design
Implementation
Testing 
Documentation
Evaluation
Maintenance

Question 3

What are the problems with the waterfall model?

Answer 3

Testing happens late, if at all
Requirements decoupled from code during development
Hard work to test, so problems are not always detected

Question 4

Describe the idea between TDD

Answer 4

Identify a small feature to be implemented
Write and run a unit test for it
Write smallest bit of code that will pass the test
Run test
Repeat

Question 5

Describe the approach of TDD

Answer 5

Make small improvements frequently
Always have a working system
Incremental design

Question 6

What does YAGNI stand for

Answer 6

You ain’t going to need it

Question 7

What should unit tests be?

Answer 7

Focused, testing one thing at a time
Fast to run
Independent (of each other, the environment, run order)
Automatic

Question 8

What features of JUnit make it suited to test driven development?

Answer 8

• Framework facilitating writing and running tests
• Method to check conditions (assertEquals, assertTrue, assertThrows etc)
• Annotations to declare methods as tests, setup, teardown
• Parameterized tests