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1. Essential TDD
Bala Paranj
www.rubyplus.com

2. Objective

3. Problem Solving

6. Four Phases
• Understand the Problem
• Devise a Plan
• Carry Out the Plan
• Look Back

7. Understand the Problem
• Read the verbal statement of the problem
• Draw a figure
• Introduce a suitable notation
• Draw a table

8. Devise a Plan
• We know what needs to be done to solve the problem
• Conceive the idea of the solution
• The plan gives a general outline

9. Carry out the Plan
• The details fit into the outline

10. Look Back
• Reconsider and reexamine the completed solution
• We can improve any solution
• We can improve understanding of the solution

11. Four Phases
• Understand the Problem : Problem Domain Analysis
• Devise a Plan : Solution Domain Analysis
• Execute the Plan : Write the test
• Look Back : Refactor

13. Sub-skills
• Problem Domain Analysis
• Solution Domain Analysis
• Designing Test Cases
• Writing Tests First
• Refactoring

14. Problem Domain Analysis

15. Solution Domain Analysis

16. Carry Out the Plan

17. Look Back

18. When

19. How much?

20. Summary