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SpectoLabs Xebia TestWorks Conf October 2016
- 1. Automated Testing in a World of Interdependence: Service Virtualisation for the Modern Age TestWorksConf Workshop, 7th October Benji Hooper, Daniel Bryant, John Davenport, Tom Cunliffe
- 2. About Specto Workshops • This slide deck is an excerpt from a workshop delivered as part of the test automation TestWorksConf • http://testworksconf.com/talk/automated-testing-in-a-world-of-interdependence • The Specto team run public and private workshops (contact@specto.io) • All aspects of test automation • Microservice testing and service virtualisation with Hoverfly • Incorporating FR / NFR testing into a build pipeline
- 3. Testing is kind of important.
- 4. Knight Capital, 2012 $440m loss Neiman Marcus, Black Friday 2015 IPO cancelled Stock trading disruption 12 hour outage Royal Bank of Scotland, 2012 Transactions disrupted worldwide £500m in fines and compensation
- 5. OK - very important.
- 6. In any complex distributed system… … testing an individual component in isolation is difficult…. … and test automation is sometimes impossible
- 7. Agenda • Group flip-chart sessions (30 minutes) • Introduction to service virtualization (20 minutes) • Hands-on session (50 minutes) • Wrap up
- 8. Group flip-chart session • Equal-sized groups: • 1 facilitator - Edze, Tom, Daniel, Benji and John • 1 scribe • 1 presenter • 30 minutes • 10-15 minutes: read the scenario & discuss issues • 4 presentations of 4 minutes - your main issues and solutions
- 9. The busy QA / developer’s guide to service virtualisation
- 10. credit to @mogronalol 10 Resources shopfront stockmanager productcatalogue Payments Fraud Cost
- 11. credit to @mogronalol 11
- 12. credit to @mogronalol 12 Licensing Consumer Producer Consumer Producer Third party Cost
- 13. credit to @mogronalol 13 Dependency Constraints Consumer Producer Consumer Producer
- 14. credit to @mogronalol 14 Flakey Dependencies Consumer Producer Consumer Producer
- 15. credit to @mogronalol 15 Doesn't exist Consumer ?
- 16. credit to @mogronalol 16 Non Deterministic assertThat(booking.getDate()) .isEqualTo(LocalDate.of(2013,1,8)); Consumer Booking Service Consumer Booking Service Consumer Booking Service { “date” : “2013-01-08”, … } { “date” : “2016-02-07”, … }
- 17. credit to @mogronalol 17 Fault Injection Consumer Producer Consumer Producer 4xx, 5xx, timeouts Operationally challenging to trigger faults
- 18. credit to @mogronalol 18 Service Virtualisation • Emulation of real service • Non-intrusive • Lightweight - or should be
- 19. credit to @mogronalol 19 Service Virtualisation Consumer Producer Virtual Producer
- 20. credit to @mogronalol 20 Creating Data Consumer Producer Service Virtualisation Tool
- 21. credit to @mogronalol 21 Creating Data https://github.com/tomakehurst/wiremock
- 22. credit to @mogronalol 22 Proxy Mode Consumer Producer Service Virtualisation Tool
- 23. credit to @mogronalol 23 Webserver / Facade Mode Consumer Producer Service Virtualisation Tool
- 24. credit to @mogronalol 24 Not Mocking Service Under Test Mocking Dependant Service Http Virtual Service Mocks bleed into the architectural boundary of your application
- 25. credit to @mogronalol 25 Open Source Tooling
- 26. credit to @mogronalol 26 Record and replay Consumer External Producer Service Virtualisati on Tool
- 27. credit to @mogronalol 27 JUnit Example @Rule public HoverflyRule hoverflyRule = HoverflyRule.inCaptureMode(“src/test/ resources/external.json").build(); @Test public void shouldBeAbleToRetrieveABooking() throws URISyntaxException { // Given final int bookingId = 1; // When final Booking booking = bookingServiceGateway.getBooking(bookingId); // Then assertThat(booking.getCustomer()).isEqualTo(“Andrew Morgan”); assertThat(booking.getDate()).isEqualTo(LocalDate.of(2016,3,1)); }
- 28. credit to @mogronalol 28 JUnit Example { "data": [ { "request": { "path": "/api/bookings/1", "method": "GET", "destination": "www.my-test.com", "query": null, "body": "" }, "response": { "status": 200, "body": “{”customer”:”Andrew Morgan", ”date”: ”2016-03-01”}}}”, "headers": { "Content-Type": [ "application/json" ] } } } ] }
- 29. credit to @mogronalol 29 JUnit Example @Test public void shouldBeAbleToRetrieveABooking() throws URISyntaxException { // Given final int bookingId = 1; // When final Booking booking = bookingServiceGateway.getBooking(bookingId); // Then assertThat(booking.getCustomer()).isEqualTo(“Andrew Morgan”); assertThat(booking.getDate()).isEqualTo(LocalDate.of(2016,3,1)); } @Rule public HoverflyRule hoverflyRule = HoverflyRule.buildFromClassPathResource(“external.json").build();
- 30. credit to @mogronalol 30 Advantages • Isolation • Flaky dependencies • Rate limiting • Deterministic • Licensing
- 31. credit to @mogronalol 31 Deployment and Infrastructure Consumer External Producer Virtual Service Internal Producer Internal Producer Internal Producer Virtual Service Virtual Service Virtual Service
- 32. credit to @mogronalol 32 CLI Example $ hoverctl start —proxy-port 8080 $ hoverctl import accounts-service-simulation.json $ hoverctl start —proxy-port 8081 $ hoverctl import payments-service-simulation.json $ curl http://www.account-service.com/api/v1/accounts/1 —proxy http:// localhost:8080 [{"name":"foo"}] $ curl http://www.payment-service.com/api/v1/payments/1 -proxy http:// localhost:8081 [{“amount":"£23.27"}]
- 33. Hands-on session • Exercise 1: Explore an application that needs testing and create the simulations required to test it independently • Exercise 2: Test the circuit breakers in an application using Hoverfly • Code available: • https://github.com/benjih/oreilly-docker-java-shopping • Edze, Tom, Daniel, Benji and John will be around for help if needed (and feel free to work with others!)
- 34. Let’s wrap this up…
- 35. If you create simulations of components… … then individual components can be tested in isolation.
- 36. A simulation of a component behaves like the real thing… … it misbehaves like the real thing… So you can create a realistic, repeatable test environment… … and automate all the things.
- 37. github.com/SpectoLabs/hoverfly specto.io/blog We run public and private training workshops: contact@specto.io