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1. Essential TDD
Bala Paranj
www.rubyplus.com

2. Objective

3. Outline
1. What?
2. Why?
3. Where do we begin?
4. What is the focus?
5. What are the artifacts?
6. When do you stop?
7. Tips

4. Problem Domain Analysis

5. Why?

6. Where do we begin?

7. Problem Statement

8. Sum a list of numbers

9. Understanding

11. Artifacts

12. • Create a diagram
• Equation
• Table

13. When do you stop?

14. Understanding

15. Tips
• Is there any assumptions
• What are the assumptions

16. Tips
• Do not solve the problem
• Do not describe steps needed to get there

17. Tips
• Draw diagrams
• Use your own notation
• Express the problem statement as an equation

18. Problem Domain Analysis
1. What?
2. Why?
3. Where do we begin?
4. What is the focus?
5. What are the artifacts?
6. When do you stop?
7. Tips

19. Solution Domain Analysis

20. Why?

21. Previous Phase

22. Understanding

24. Artifacts

26. 1. Create a list of all foods
2. Create CSV header
3. Create a row for each food item
4. Save CSV file.

27. Retrieve list of all foods
Create the csv file
Create the csv header
for each food in the list
: create a row
save the csv file

28. Algorithm

29. foods = Food.all
csv = Csv.new(file_name)
csv.header(header_values)
for each food in foods
csv.row(food)
end
csv.save

30. When do you stop?

31. Tips
• Solve the problem
• Describe steps needed to get there

32. Solution Domain Analysis
1. What?
2. Why?
3. Where do we begin?
4. What is the focus?
5. When do you stop?
6. What are the artifacts?
7. Tips

33. Summary