Scalability and Hardware at Nomanini

Scaling TDD, CI and CD for Hardware, Firmware and Software, presented at Scaleconf 2013

Transcript

1. © Nomanini, 2013 Scalability and Hardware
2. © Nomanini, 2013 @dalehumby nomanini.com
3. © Nomanini, 2013 million 700 pa 85 $ bn 60 $ Mobile subscribers in Africa Ave spend by mobile subscribers Total market Source: Pyramid Forecast for AME, McKinsey Global Institute, Lions on the move, Jan 2010
4. © Nomanini, 2013 Fast Transactions Easy to use Trusted method • Fast printing • Trusted proof of transaction • Reliable • Simple interface 1 2 3 Scratch cards Nomanini terminal
5. © Nomanini, 2013
6. © Nomanini, 2013 Pick n Pay MTN Vodacom Server on GAE Cash Airtime Credit Redemption Printed voucher Seller Mobile subscriber Cash
7. © Nomanini, 2013
8. © Nomanini, 2013
9. © Nomanini, 2013 Please add a Lock button
10. © Nomanini, 2013
11. © Nomanini, 2013 Planned Dev Test Demo UAT Package Released Ready Monitor
12. © Nomanini, 2013
13. © Nomanini, 2013 Cross-functional people
14. © Nomanini, 2013
15. © Nomanini, 2013
16. © Nomanini, 2013
17. © Nomanini, 2013
18. © Nomanini, 2013 8-bit CPU 16 kB Flash 2 kB RAM
19. © Nomanini, 2013 Keyboard LED Driver State Machine Logic Hardware Vd d
20. © Nomanini, 2013 Keyboard LED Driver RAM State Machine Logic Proxy for hardware
21. © Nomanini, 2013 KeyBoard Helper LED Helper Driver Mocks RAM State Machine Logic Proxy for hardware
22. © Nomanini, 2013 bool TestStateManager_LockLEDOnWhenLockPressed(void) { // GIVEN Lock LED is off LED_TurnLockLEDOff(); // WHEN Lock button is pressed KeyBoardHelper_PressLockButton(); // AND scan keyboard StateMachine_Update(); // THEN Lock LED should be on ASSERT_TRUE_MESSAGE(LED_IsRedLockLEDOn(), “Red Lock LED should be on”); }
23. © Nomanini, 2013 KeyBoard Helper LED Helper Driver Mocks RAM FALSE State Machine Logic Test // GIVEN Lock LED is off LED_TurnLockLEDOff();
24. © Nomanini, 2013 KeyBoard Helper LED Helper RAM TRUE FALSE State Machine Logic Test Press button // WHEN Lock button is pressed KeyBoardHelper_PressLockButton(); Driver Mocks
25. © Nomanini, 2013 KeyBoard Helper LED Helper RAM TRUE TRUE State Machine Logic Test Press button Update // AND scan keyboard StateMachine_Update(); Driver Mocks
26. © Nomanini, 2013 KeyBoard Helper LED Helper RAM TRUE TRUE State Machine Logic Test Press button Update Assert // THEN Lock LED should be on ASSERT_TRUE_MESSAGE(LED_IsRedLockLEDOn(), “Red Lock LED should be on”); Driver Mocks
27. © Nomanini, 2013
28. © Nomanini, 2013 Running All Tests... Hardware Rev 6, rel 2 Firmware 2623-0d8ab4be2f02 Running Test Fixture: State Manager Tests (Part A) --------------------- TestStateManager_ButtonPressTimesOut:PASS TestStateManager_LockLEDOnWhenLockPressed:PASS ... TestStateManager_StaysLockedWhileCharging:FAIL 11 Tests 1 Failures 1 Ignored Test Run FAILED. 10/11 tests passed. Terminal output
29. © Nomanini, 2013 Jenkins CI
30. © Nomanini, 2013 Started by upstream project "Slave-Build" build #361 run_functional_tests.py -c ci.ini tests(INFO): TEST_BLOCK_1.s19 ... ok tests(INFO): TEST_BLOCK_2.s19 ... ok tests(INFO): TEST_BLOCK_3.s19 ... ok tests(INFO): TEST_BLOCK_4.s19 ... ok tests(INFO): TEST_BLOCK_5.s19 ... ok ... tests(INFO): TEST_BLOCK_23.s19 ... ok tests(INFO): Test run passed Triggering a new build of Upload_to_FTP_for_CI #245 Notifying upstream projects of job completion Finished: SUCCESS Console Output
31. © Nomanini, 2013
32. © Nomanini, 2013 Done is used by customers
33. © Nomanini, 2013
34. © Nomanini, 2013
35. © Nomanini, 2013 Feature flags
36. © Nomanini, 2013
37. © Nomanini, 2013 Monitoring
38. © Nomanini, 2013
39. © Nomanini, 2013 Measure everything Find the bottlenecks Fix them methodically Start today
40. © Nomanini, 2013 Dale Humby dale@nomanini.com @dalehumby