Micro Service Architecture Is the Test Pyramid relevant in Microservices? How to guarantee communication in microservices? Test environment in microservices Tests in production, blue green, etc. The 4 key metrics

1. Software Quality
Micro Services

2. Today’s Topics
• Micro Service Architecture
• Is the Test Pyramid relevant in Microservices?
• How to guarantee communication in microservices?
• Test environment in microservices
• Tests in production, blue green, etc.
• The 4 key metrics

3. Rafael Lima
Who am I?
• Since 2003 working in tech.

4. Rafael Lima
Who am I?
• Since 2003 working in tech.
• Dev → QA → QA Team Leader → Dev → QA → Dev Team Leader → QA/Dev

5. Rafael Lima
Who am I?
• Since 2003 working in tech.
• Dev → QA → QA Team Leader → Dev → QA → Dev Team Leader → SDET
• Bachelor of Computer Science

6. Rafael Lima
Who am I?
• Since 2003 working in tech.
• Dev → QA → QA Team Leader → Dev → QA → Dev Team Leader → SDET
• Bachelor of Computer Science
• Since 2010 working with test automation

7. Rafael Lima
Who am I?
• Since 2003 working in tech.
• Dev → QA → QA Team Leader → Dev → QA → Dev Team Leader → SDET
• Bachelor of Computer Science
• Since 2010 working with test automation
• 7 years at ThoughtWorks Brazil (Senior Consultant and Lead)

8. Rafael Lima
Who am I?
• Since 2003 working in tech.
• Dev → QA → QA Team Leader → Dev → QA → Dev Team Leader → SDET
• Bachelor of Computer Science
• Since 2010 working with test automation
• 7 years at ThoughtWorks Brazil (Senior Consultant and Lead)
• 4 years working for a client in Silicon Valley
• 1 year as the lead of a training program for junior consultants

9. Rafael Lima
Who am I?
• Since 2003 working in tech.
• Dev → QA → QA Team Leader → Dev → QA → Dev Team Leader → SDET
• Bachelor of Computer Science
• Since 2010 working with test automation
• 7 years at ThoughtWorks Brazil (Senior Consultant and Lead)
• 4 years working for a client in Silicon Valley
• 1 year as the lead of a training program for junior consultants
• 2 years at Wise in London as a Software Developer in Test
• MicroServices
• Self-employed teams with devops culture
• Average of 100+ deploys for production per day

10. Rafael Lima
Contact
https://github.com/rafalima/
https://github.com/qa-ops
https://linkedin.com/in/rafaelplima
https://youtube.com/c/QaOps
https://social.qa-ops.com/telegram-en

11. MicroServices

12. Monolith
Services
DB DB DB
REST API

13. Service
DB
REST API
Services
REST API
MicroServices

14. Service
DB
REST API
Services
REST API
Service
REST API
DB
MicroServices

15. Service
DB
REST API
Service
REST API
Services
REST API
Service
REST API
DB
DB
MicroServices

16. Service
DB
REST API
Service
REST API
Services
REST API
Service
REST API
DB
DB
MicroServices
Queue
Service
REST API
Service

17. MicroServices

18. MicroServices

19. MicroServices
https://martinfowler.com/bliki/MicroservicePrerequisites.html
• Fast provisioning

20. MicroServices
https://martinfowler.com/bliki/MicroservicePrerequisites.html
• Fast provisioning
• Monitoring and Observation

21. MicroServices
https://martinfowler.com/bliki/MicroservicePrerequisites.html
• Fast provisioning
• Monitoring and Observation
• Fast Installations (Deploys)

22. The 4 key metrics
https://cloud.google.com/devops/state-of-devops

23. 1. Deployment Frequency

24. 2. Lead Time for Changes

25. 3. Change Failure Rate

26. 4. Time to Restore Service

29. Test Pyramid

30. Test Pyramid
Ideal Pyramid
- Mesma imagem do primeiro slide da Pirâmide Ideal

31. Test Pyramid
Ideal Pyramid
+int
+iso
$$$
¢
- Mesma imagem do primeiro slide da Pirâmide Ideal

32. Is the test pyramid still relevant
in microservices?

33. What is the purpose of the test
pyramid?

34. Fast feedback

35. Do I need to worry about which layer of
the test pyramid to write my tests in
microservices?

36. Write the test you think is necessary, regardless of
the pyramid.
Only care about the total time of the suite.

37. Communication between
MicroServices

38. Contract Testing
{
"id": 10,
"name": "Lela",
"category": {
"id": 1,
"name": "Dog"
},
"photoUrls": [
“www.photo.com“
],
"state": "available"
}

39. Contract Testing
public class Animal {
private int id;
private String name;
private Category category;
private String state;
private List<String> photoUrls;
public class Category {
private int id;
private String name;
}
}
{
"id": 10,
"name": "Lela",
"category": {
"id": 1,
"name": "Dog"
},
"photoUrls": [
“www.photo.com“
],
"state": "available"
}

40. Contract Testing
A
Contract Testing
C
Contract Testing
Contract Testing Contract Testing
B
D

41. Consumer based contract testing

42. Consumer based contract testing
Provider
Repo

43. Consumer based contract testing
Provider
Repo
Consumer 1

44. Consumer based contract testing
Provider
Repo
Consumer 1 Consumer 2

45. Consumer based contract testing
Provider
Repo
Consumer 1 Consumer 2 Provider

46. Consumer based contract testing
Provider
Repo
Consumer 1 Consumer 2 Provider
Consumer 100

47. What is the problem with this
approach?

48. What other forms of
communication can I use?

49. gRPC

50. Library

51. Library
List<Animal> animals = animalStore.getAnimals(‘available')

52. Library
List<Animal> animals = animalStore.getAnimals(‘available')
public enum AnimalState {
AVAILABLE,
DELETED,
WAITING;
}
public enum AnimalState {
AVAILABLE,
DELETED,
WAITING,
SHIPPED;
}
V2 V3

53. How to guarantee versions of
the parse library or class?

54. Test environment in
microservices

55. How many environments does a
team need?

56. Tests Environment
DEV

57. Tests Environment
DEV QA

58. Tests Environment
DEV QA ShowCase

59. Tests Environment
DEV QA ShowCase Pre-Prod

60. Tests Environment
DEV QA ShowCase Pre-Prod Prod

61. Are all these environments
sustainable?

62. And what about when you have 400+
microservices and 500+ engineers?

63. Old Solution
Staging
Service A

64. Old Solution
Staging
Service A
Service B

65. Old Solution
Staging
Service A
Service B Service C

66. Old Solution
Staging
Service A
Service B Service C
Service A

67. Staging was always broken

68. We created our own solution,
called Custom Environment

69. Staging is still used today

70. Tests in Production

71. Should we run tests on Prod?

72. Smoke Tests with real money

73. We also do Canary Releases

74. Canary Release
100%

75. Canary Release
75%
25%

76. Canary Release
100%

77. What is the difference between
Canary Release and Blue Green?

78. Blue Green

79. Blue Green

80. Minimum 25% is too high already

81. Improving our Canary Release

82. And the toggle feature?

83. Feature Toggle (Switch features)
IF (EasternPromotion.ON)
Price = GBP 5
ELSE
Price = GBP 15

84. A/B Testing
IF (City == London)
Test new UI
ELSE
Keep old UI

85. Thank you
• Youtube: https://www.youtube.com/c/qaops
• Linkedin: https://www.linkedin.com/in/rafaelplima/
• Telegram: https://social.qa-ops.com/telegram-en

86. References
• http://martinfowler.com/bliki/MicroservicePrerequisites.html
• https://cloud.google.com/devops/state-of-devops
• https://www.oreilly.com/library/view/accelerate/9781457191435/
• https://learning.oreilly.com/library/view/continuous-delivery-reliable/9780321670250/
• https://samnewman.io/books/building_microservices/