Painless network tests for Android using MockWebServer

How to create repeatable and reliable HTTP tests without talking to an external server. A journey from happy paths to awkward scenarios: expected requests, slow-loading responses, errors, etc.

https://github.com/VitorNoVictor/MockWebServerDemo

Transcript

1. Painless network tests using MockWebServer Vitor Nunes
2. 1. Very useful app
3. GitHub ID Finder (happy path)
4. GitHub ID Finder (errors)
5. 2. Network tests
6. Network tests are painful ▣ External resources ▣ Control over resources ▣ Clean slate
7. 3. What is MockWebServer?
8. MockWebServer ▣ Scriptable web server for testing HTTP clients ▣ Part of OkHttp library by Square ▣ Exercises the full HTTP stack ▣ It can be used to test any HTTP client
9. Basic usage Instantiate Server Share Base URL Start Server Provide Mocks Shutdown Server Test Requests
10. Basic usage
11. Response Queue The first request is served by the first response. Providing responses Dispatcher Handles requests and provides responses using custom logic.
12. Response queue
13. Dispatcher Extend Dispatcher (abstract class) Provide instance to MockWebServer
14. 4. What can you test with MockWebServer?
15. Test scenarios Server errors Valid responses Timeouts Requests
16. Don’t worry if you aren’t familiar with Espresso
17. Valid responses
18. Server errors
19. Server errors
20. Timeouts
21. Timeouts
22. Requests
23. 5. Setup
24. Instrumentation test Test Runner Test Application Tests Test Rules Idling Resources
25. Test structure
26. MockWebServerRule
27. OkHttpIdlingResourceRule
28. Connecting your app to MockWebServer
29. Providing the URL Application Server URL Network client Test Runner Test Application Activities etc MockWebServer URL
30. Application
31. Test Runner
32. Test Runner
33. Test Runner
34. 6. Bonus: RESTMock
35. RESTMock
36. Thanks! Any questions? @VitorNoVictor VitorNoVictor@gmail.com Code: https://github.com/VitorNoVictor/MockWebServerDemo