red, green, ... what now?!

1. Red, green, what now?! @kevinrutherford @jjeffries1

2. Primitive Obsession Feature Envy Sim ulated Polym orphism Lazy Class Temporary Field Inappropriate Intimacy ShotgunSurgery Data Clump Long M ethod Large Class ??? ??? ??? ??? ??? ??? ??? RefusedBequest

3. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Connascence of ...

13. Scanning a single item

14. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Test: Code:

15. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Test: Code:CoEO scan()scan()

16. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Test: Code: CoV CoEO scan()scan() 5050

17. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Test: Code:CoEO CoM scan()scan() int int int

18. Checkout with an empty basket

19. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Test: Code: CoM int int int unitPrice = 50 unitPrice = 50 int CoA

20. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Test: Code: CoM int int int

22. Different items have different prices

23. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Test: Code: string string CoM

24. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Test: Code: string string balance.add() balance.add() CoM CoA

25. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Test: Code: AA string string balance.add() balance.add() CoV CoM CoA

26. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Test: Code: CoV AA 3030 string string balance.add() balance.add() CoV CoM CoA

27. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Test: Code: AA string string balance.add() balance.add() CoV CoM CoA Money, MoneyMoney, Money CoP

28. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Test: Code: string string balance.add() balance.add() CoM CoA Money, MoneyMoney, Money CoP

29. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Test: Code: string string CoM Map Map CoM

31. Recap

32. Scanning a single item

33. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Scanning has no effect on the balance Both classes know the price = 50

34. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Introduce Parameter{

35. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Scanning has no effect on the balance Everyone knows we use an int to represent money

36. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Write a test{

37. Checkout with an empty basket

38. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Everyone knows we use an int to represent money Common test setup

39. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Introduce @Before block{

40. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Everyone knows we use an int to represent money

41. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Introduce Money class{

42. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9

43. Different items have different prices

44. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 balance.add() called twice Strings used to represent product codes Everyone depends on A Everyone knows the price of B

46. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 balance.add() called twice Strings used to represent product codes Everyone depends on A Constructor parameters are indistinguishable

48. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 balance.add() called twice Strings used to represent product codes Constructor parameters are indistinguishable

49. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Introduce a Map of names to prices{

50. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Strings used to represent product codes Map used to represent the price list

51. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Introduce PriceList{

52. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9 Introduce ProductCode{

53. Name Type Meaning Algorithm Position Execution Order Timing Value Identity 1 2 3 4 5 6 7 8 9

54. Red, green, what now?! @kevinrutherford @jjeffries1

red, green, ... what now?!

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