The document introduces test-driven development (TDD) and provides examples of using it with Ruby and JavaScript. It explains that testing is not the same as TDD, and that test-first is a form of TDD where the tests are written before the code. Examples are given for building a FizzBuzz program and converting numbers to Roman numerals using TDD in a test-first approach with Ruby and JavaScript libraries. The document encourages thinking about the desired outcomes before implementing solutions in a straightforward way and making the solutions simpler.

1. TDD
...or how to develop software in style!

2. Some basics

3. Testing is not TDD

4. Test first is kind of TDD

5. TDD is software design

6. Familiar with TDD in ruby?

7. require "minitest/autorun"
!
class Foo
def great?
true
end
end
!
describe Foo do
it "is great" do
Foo.new.great?.must_equal true
end
end

8. Done any JavaScript testing?

9. Ok let’s build the simplest thing possible!
!
FizzBuzz

10. What is important here?

11. Think what the outcome should be

12. Implement in the most straightforward way

13. Make it simpler!

14. Ok your turn!

15. Roman Numerals!
1 -> I, 2 -> II
4 -> IV 5 -> V
9 -> IX 10 -> X
40 -> XL 3999 -> MMMCMXCVIV
!
npm install jasmine-node -g
!
jasmine-node roman.spec.js

16. How did it go?

17. Ok those are the basics!