Bugs - What are they good for

Transcript

1. 1 Bugs What are they good for?

2. None

3. What is a bug?

4. “First actual case of bug being found” Grace Hopper -

   1947

5. “I did find a bug in my apparatus” Thomas Edison

   - 1878

6. The Crash <> Request Scale Crash Change Request ⚠

7. Let’s ship some products

8. Numbers only?

9. Nope

10. “You didn’t say you wanted to ship stuff to the

    Queen”

11. “Well you should know how addresses work”

12. The Crash <> Request Scale Crash Change Request ⚠

13. Record Investigate Fix

14. None

15. Reproduce It Fix It Ship It

16. Find a reproducible scenario

17. Speeds up fixing process

18. accepted Closed Won

19. paid Closed Lost

20. context 'accepted order' do let(:order) { build(:order, status: 'accepted') }

    it 'returns "closed won"' do expect(deal_stage(order)).to eq('closed won') end end context 'paid order' do let(:order) { build(:order, status: 'paid') } it 'returns "closed won"' do expect(deal_stage(order)).to eq('closed won') end end

21. def deal_stage(order) return 'enquired' if order.nil? return 'quoted' if order.open?

    return 'closed won' if order.accepted? 'closed lost' end

22. Lets you try out different solutions

23. Makes it clear what to fix

24. NoMethodError: undefined method `date’ for nil:NilClass

25. def render(order) { id: order.id, delivery_date: order.delivery.date } end

26. def render(order) { id: order.id, delivery_date: order.delivery&.date } end

27. GET /api/v1/orders?status=delivered • Order 01 • Order 02 • Order

    03

28. Confidence that bug has been fixed

29. Continuous Integration Heroku Review Apps Create App Precompile Assets Create/Migrate

    Database Launch App Code

30. But what about actually fixing the bugs?

31. def deal_stage(order) puts "What's happening?: #{order.inspect}" return 'enquired' if order.nil?

    puts "What's happening?: #{order.inspect}" return 'quoted' if order.open? puts "What's happening?: #{order.inspect}" return 'closed won' if order.accepted? puts "What's happening?: #{order.inspect}" 'closed lost' end Puts Debugging

32. github.com/pry/pry def deal_stage(order) binding.pry return 'enquired' if order.nil? return 'quoted'

    if order.open? return 'closed won' if order.accepted? 'closed lost' end

33. Is it really the culprit? Caching Third Party Libraries Recent

    Changes User

34. Push Continuous Integration Deploy Revert Continuous Integration

35. Record Investigate Fix Now Depends on Urgency/Impact

36. My Latest Bug

37. None
38. None
39. None
40. None

41. Reproduce It Don’t jump to conclusions